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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `GroupingMap` struct in crate `itertools`."><meta name="keywords" content="rust, rustlang, rust-lang, GroupingMap"><title>itertools::structs::GroupingMap - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc struct"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><a href='../../itertools/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a><p class="location">Struct GroupingMap</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#implementations">Methods</a><div class="sidebar-links"><a href="#method.aggregate">aggregate</a><a href="#method.collect">collect</a><a href="#method.fold">fold</a><a href="#method.fold_first">fold_first</a><a href="#method.max">max</a><a href="#method.max_by">max_by</a><a href="#method.max_by_key">max_by_key</a><a href="#method.min">min</a><a href="#method.min_by">min_by</a><a href="#method.min_by_key">min_by_key</a><a href="#method.minmax">minmax</a><a href="#method.minmax_by">minmax_by</a><a href="#method.minmax_by_key">minmax_by_key</a><a href="#method.product">product</a><a href="#method.sum">sum</a></div><a class="sidebar-title" href="#trait-implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Clone">Clone</a><a href="#impl-Debug">Debug</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-RefUnwindSafe">RefUnwindSafe</a><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a><a href="#impl-Unpin">Unpin</a><a href="#impl-UnwindSafe">UnwindSafe</a></div><a class="sidebar-title" href="#blanket-implementations">Blanket Implementations</a><div class="sidebar-links"><a href="#impl-Any">Any</a><a href="#impl-Borrow%3CT%3E">Borrow&lt;T&gt;</a><a href="#impl-BorrowMut%3CT%3E">BorrowMut&lt;T&gt;</a><a href="#impl-From%3CT%3E">From&lt;T&gt;</a><a href="#impl-Into%3CU%3E">Into&lt;U&gt;</a><a href="#impl-ToOwned">ToOwned</a><a href="#impl-TryFrom%3CU%3E">TryFrom&lt;U&gt;</a><a href="#impl-TryInto%3CU%3E">TryInto&lt;U&gt;</a></div></div><p class="location"><a href="../index.html">itertools</a>::<wbr><a href="index.html">structs</a></p><div id="sidebar-vars" data-name="GroupingMap" data-ty="struct" data-relpath=""></div><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Struct <a href="../index.html">itertools</a>::<wbr><a href="index.html">structs</a>::<wbr><a class="struct" href="">GroupingMap</a></span><span class="out-of-band"><span id="render-detail"><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">&#x2212;</span>]</a></span><a class="srclink" href="../../src/itertools/grouping_map.rs.html#52-54" title="goto source code">[src]</a></span></h1><div class="docblock type-decl hidden-by-usual-hider"><pre class="rust struct"><span class="docblock attributes top-attr">#[must_use = "GroupingMap is lazy and do nothing unless consumed"]</span>pub struct GroupingMap&lt;I&gt; { /* fields omitted */ }</pre></div><div class="docblock"><p><code>GroupingMap</code> is an intermediate struct for efficient group-and-fold operations.
It groups elements by their key and at the same time fold each group
using some aggregating operation.</p>
<p>No method on this struct performs temporary allocations.</p>
</div><h2 id="implementations" class="small-section-header">Implementations<a href="#implementations" class="anchor"></a></h2><h3 id="impl" class="impl"><code class="in-band">impl&lt;I, K, V&gt; <a class="struct" href="../../itertools/structs/struct.GroupingMap.html" title="struct itertools::structs::GroupingMap">GroupingMap</a>&lt;I&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/iterator/trait.Iterator.html" title="trait core::iter::traits::iterator::Iterator">Iterator</a>&lt;Item = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a>K, V<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a>&gt;,<br>&nbsp;&nbsp;&nbsp;&nbsp;K: <a class="trait" href="https://doc.rust-lang.org/nightly/core/hash/trait.Hash.html" title="trait core::hash::Hash">Hash</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Eq.html" title="trait core::cmp::Eq">Eq</a>,&nbsp;</span></code><a href="#impl" class="anchor"></a><a class="srclink" href="../../src/itertools/grouping_map.rs.html#56-536" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.aggregate" class="method"><code>pub fn <a href="#method.aggregate" class="fnname">aggregate</a>&lt;FO, R&gt;(self, operation: FO) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;FO: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;R&gt;, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>K, V) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;R&gt;,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#100-113" title="goto source code">[src]</a></h4><div class="docblock"><p>This is the generic way to perform any operation on a <code>GroupingMap</code>.
It's suggested to use this method only to implement custom operations
when the already provided ones are not enough.</p>
<p>Groups elements from the <code>GroupingMap</code> source by key and applies <code>operation</code> to the elements
of each group sequentially, passing the previously accumulated value, a reference to the key
and the current element as arguments, and stores the results in an <code>HashMap</code>.</p>
<p>The <code>operation</code> function is invoked on each element with the following parameters:</p>
<ul>
<li>the current value of the accumulator of the group if there is currently one;</li>
<li>a reference to the key of the group this element belongs to;</li>
<li>the element from the source being aggregated;</li>
</ul>
<p>If <code>operation</code> returns <code>Some(element)</code> then the accumulator is updated with <code>element</code>,
otherwise the previous accumulation is discarded.</p>
<p>Return a <code>HashMap</code> associating the key of each group with the result of aggregation of
that group's elements. If the aggregation of the last element of a group discards the
accumulator then there won't be an entry associated to that group's key.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">data</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">2</span>, <span class="number">8</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">9</span>, <span class="number">0</span>, <span class="number">4</span>, <span class="number">10</span>];
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="ident">data</span>.<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">4</span>)
.<span class="ident">aggregate</span>(<span class="op">|</span><span class="ident">acc</span>, <span class="ident">_key</span>, <span class="ident">val</span><span class="op">|</span> {
<span class="kw">if</span> <span class="ident">val</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> <span class="op">|</span><span class="op">|</span> <span class="ident">val</span> <span class="op">=</span><span class="op">=</span> <span class="number">10</span> {
<span class="prelude-val">None</span>
} <span class="kw">else</span> {
<span class="prelude-val">Some</span>(<span class="ident">acc</span>.<span class="ident">unwrap_or</span>(<span class="number">0</span>) <span class="op">+</span> <span class="ident">val</span>)
}
});
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">4</span>); <span class="comment">// 0 resets the accumulator so only 4 is summed</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">5</span> <span class="op">+</span> <span class="number">9</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">get</span>(<span class="kw-2">&amp;</span><span class="number">2</span>), <span class="prelude-val">None</span>); <span class="comment">// 10 resets the accumulator and nothing is summed afterward</span>
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">3</span>], <span class="number">7</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>); <span class="comment">// The final keys are only 0, 1 and 2</span></pre></div>
</div><h4 id="method.fold" class="method"><code>pub fn <a href="#method.fold" class="fnname">fold</a>&lt;FO, R&gt;(self, init: R, operation: FO) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, R&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;R: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;FO: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(R, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>K, V) -&gt; R,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#140-148" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and applies <code>operation</code> to the elements
of each group sequentially, passing the previously accumulated value, a reference to the key
and the current element as arguments, and stores the results in a new map.</p>
<p><code>init</code> is the value from which will be cloned the initial value of each accumulator.</p>
<p><code>operation</code> is a function that is invoked on each element with the following parameters:</p>
<ul>
<li>the current value of the accumulator of the group;</li>
<li>a reference to the key of the group this element belongs to;</li>
<li>the element from the source being accumulated.</li>
</ul>
<p>Return a <code>HashMap</code> associating the key of each group with the result of folding that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> (<span class="number">1</span>..<span class="op">=</span><span class="number">7</span>)
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">fold</span>(<span class="number">0</span>, <span class="op">|</span><span class="ident">acc</span>, <span class="ident">_key</span>, <span class="ident">val</span><span class="op">|</span> <span class="ident">acc</span> <span class="op">+</span> <span class="ident">val</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">3</span> <span class="op">+</span> <span class="number">6</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">1</span> <span class="op">+</span> <span class="number">4</span> <span class="op">+</span> <span class="number">7</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="number">2</span> <span class="op">+</span> <span class="number">5</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.fold_first" class="method"><code>pub fn <a href="#method.fold_first" class="fnname">fold_first</a>&lt;FO&gt;(self, operation: FO) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, V&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;FO: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(V, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>K, V) -&gt; V,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#177-186" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and applies <code>operation</code> to the elements
of each group sequentially, passing the previously accumulated value, a reference to the key
and the current element as arguments, and stores the results in a new map.</p>
<p>This is similar to <a href="#tymethod.fold"><code>fold</code></a> but the initial value of the accumulator is the first element of the group.</p>
<p><code>operation</code> is a function that is invoked on each element with the following parameters:</p>
<ul>
<li>the current value of the accumulator of the group;</li>
<li>a reference to the key of the group this element belongs to;</li>
<li>the element from the source being accumulated.</li>
</ul>
<p>Return a <code>HashMap</code> associating the key of each group with the result of folding that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> (<span class="number">1</span>..<span class="op">=</span><span class="number">7</span>)
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">fold_first</span>(<span class="op">|</span><span class="ident">acc</span>, <span class="ident">_key</span>, <span class="ident">val</span><span class="op">|</span> <span class="ident">acc</span> <span class="op">+</span> <span class="ident">val</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">3</span> <span class="op">+</span> <span class="number">6</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">1</span> <span class="op">+</span> <span class="number">4</span> <span class="op">+</span> <span class="number">7</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="number">2</span> <span class="op">+</span> <span class="number">5</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.collect" class="method"><code>pub fn <a href="#method.collect" class="fnname">collect</a>&lt;C&gt;(self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, C&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;C: <a class="trait" href="https://doc.rust-lang.org/nightly/core/default/trait.Default.html" title="trait core::default::Default">Default</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.Extend.html" title="trait core::iter::traits::collect::Extend">Extend</a>&lt;V&gt;,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#206-216" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and collects the elements of each group in
an instance of <code>C</code>. The iteration order is preserved when inserting elements. </p>
<p>Return a <code>HashMap</code> associating the key of each group with the collection containing that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashSet</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">6</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">HashSet</span><span class="op">&lt;</span><span class="kw">_</span><span class="op">&gt;</span><span class="op">&gt;</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="macro">vec</span><span class="macro">!</span>[<span class="number">0</span>, <span class="number">3</span>, <span class="number">6</span>].<span class="ident">into_iter</span>().<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">HashSet</span><span class="op">&lt;</span><span class="kw">_</span><span class="op">&gt;</span><span class="op">&gt;</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">4</span>].<span class="ident">into_iter</span>().<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">HashSet</span><span class="op">&lt;</span><span class="kw">_</span><span class="op">&gt;</span><span class="op">&gt;</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="macro">vec</span><span class="macro">!</span>[<span class="number">2</span>, <span class="number">5</span>].<span class="ident">into_iter</span>().<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">HashSet</span><span class="op">&lt;</span><span class="kw">_</span><span class="op">&gt;</span><span class="op">&gt;</span>());
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.max" class="method"><code>pub fn <a href="#method.max" class="fnname">max</a>(self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, V&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;V: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#236-240" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and finds the maximum of each group.</p>
<p>If several elements are equally maximum, the last element is picked.</p>
<p>Returns a <code>HashMap</code> associating the key of each group with the maximum of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">max</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">12</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">7</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="number">8</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.max_by" class="method"><code>pub fn <a href="#method.max_by" class="fnname">max_by</a>&lt;F&gt;(self, compare: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, V&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>K, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>V, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>V) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering">Ordering</a>,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#261-268" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and finds the maximum of each group
with respect to the specified comparison function.</p>
<p>If several elements are equally maximum, the last element is picked.</p>
<p>Returns a <code>HashMap</code> associating the key of each group with the maximum of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">max_by</span>(<span class="op">|</span><span class="ident">_key</span>, <span class="ident">x</span>, <span class="ident">y</span><span class="op">|</span> <span class="ident">y</span>.<span class="ident">cmp</span>(<span class="ident">x</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">3</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">1</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="number">5</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.max_by_key" class="method"><code>pub fn <a href="#method.max_by_key" class="fnname">max_by_key</a>&lt;F, CK&gt;(self, f: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, V&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>K, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>V) -&gt; CK,<br>&nbsp;&nbsp;&nbsp;&nbsp;CK: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#289-294" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and finds the element of each group
that gives the maximum from the specified function.</p>
<p>If several elements are equally maximum, the last element is picked.</p>
<p>Returns a <code>HashMap</code> associating the key of each group with the maximum of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">max_by_key</span>(<span class="op">|</span><span class="ident">_key</span>, <span class="kw-2">&amp;</span><span class="ident">val</span><span class="op">|</span> <span class="ident">val</span> <span class="op">%</span> <span class="number">4</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">3</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">7</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="number">5</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.min" class="method"><code>pub fn <a href="#method.min" class="fnname">min</a>(self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, V&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;V: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#314-318" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and finds the minimum of each group.</p>
<p>If several elements are equally minimum, the first element is picked.</p>
<p>Returns a <code>HashMap</code> associating the key of each group with the minimum of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">min</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">3</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">1</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="number">5</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.min_by" class="method"><code>pub fn <a href="#method.min_by" class="fnname">min_by</a>&lt;F&gt;(self, compare: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, V&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>K, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>V, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>V) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering">Ordering</a>,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#339-346" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and finds the minimum of each group
with respect to the specified comparison function.</p>
<p>If several elements are equally minimum, the first element is picked.</p>
<p>Returns a <code>HashMap</code> associating the key of each group with the minimum of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">min_by</span>(<span class="op">|</span><span class="ident">_key</span>, <span class="ident">x</span>, <span class="ident">y</span><span class="op">|</span> <span class="ident">y</span>.<span class="ident">cmp</span>(<span class="ident">x</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">12</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">7</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="number">8</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.min_by_key" class="method"><code>pub fn <a href="#method.min_by_key" class="fnname">min_by_key</a>&lt;F, CK&gt;(self, f: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, V&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>K, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>V) -&gt; CK,<br>&nbsp;&nbsp;&nbsp;&nbsp;CK: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#367-372" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and finds the element of each group
that gives the minimum from the specified function.</p>
<p>If several elements are equally minimum, the first element is picked.</p>
<p>Returns a <code>HashMap</code> associating the key of each group with the minimum of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">min_by_key</span>(<span class="op">|</span><span class="ident">_key</span>, <span class="kw-2">&amp;</span><span class="ident">val</span><span class="op">|</span> <span class="ident">val</span> <span class="op">%</span> <span class="number">4</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">12</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">4</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="number">8</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.minmax" class="method"><code>pub fn <a href="#method.minmax" class="fnname">minmax</a>(self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, <a class="enum" href="../../itertools/enum.MinMaxResult.html" title="enum itertools::MinMaxResult">MinMaxResult</a>&lt;V&gt;&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;V: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#401-405" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and find the maximum and minimum of
each group.</p>
<p>If several elements are equally maximum, the last element is picked.
If several elements are equally minimum, the first element is picked.</p>
<p>See <a href="../trait.Itertools.html#method.minmax">.minmax()</a> for the non-grouping version.</p>
<p>Differences from the non grouping version:</p>
<ul>
<li>It never produces a <code>MinMaxResult::NoElements</code></li>
<li>It doesn't have any speedup</li>
</ul>
<p>Returns a <code>HashMap</code> associating the key of each group with the minimum and maximum of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">MinMaxResult</span>::{<span class="ident">OneElement</span>, <span class="ident">MinMax</span>};
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">minmax</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="ident">MinMax</span>(<span class="number">3</span>, <span class="number">12</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="ident">MinMax</span>(<span class="number">1</span>, <span class="number">7</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="ident">OneElement</span>(<span class="number">5</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.minmax_by" class="method"><code>pub fn <a href="#method.minmax_by" class="fnname">minmax_by</a>&lt;F&gt;(self, compare: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, <a class="enum" href="../../itertools/enum.MinMaxResult.html" title="enum itertools::MinMaxResult">MinMaxResult</a>&lt;V&gt;&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>K, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>V, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>V) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/cmp/enum.Ordering.html" title="enum core::cmp::Ordering">Ordering</a>,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#430-455" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and find the maximum and minimum of
each group with respect to the specified comparison function.</p>
<p>If several elements are equally maximum, the last element is picked.
If several elements are equally minimum, the first element is picked.</p>
<p>It has the same differences from the non-grouping version as <code>minmax</code>.</p>
<p>Returns a <code>HashMap</code> associating the key of each group with the minimum and maximum of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">MinMaxResult</span>::{<span class="ident">OneElement</span>, <span class="ident">MinMax</span>};
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">minmax_by</span>(<span class="op">|</span><span class="ident">_key</span>, <span class="ident">x</span>, <span class="ident">y</span><span class="op">|</span> <span class="ident">y</span>.<span class="ident">cmp</span>(<span class="ident">x</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="ident">MinMax</span>(<span class="number">12</span>, <span class="number">3</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="ident">MinMax</span>(<span class="number">7</span>, <span class="number">1</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="ident">OneElement</span>(<span class="number">5</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.minmax_by_key" class="method"><code>pub fn <a href="#method.minmax_by_key" class="fnname">minmax_by_key</a>&lt;F, CK&gt;(self, f: F) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, <a class="enum" href="../../itertools/enum.MinMaxResult.html" title="enum itertools::MinMaxResult">MinMaxResult</a>&lt;V&gt;&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>K, <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>V) -&gt; CK,<br>&nbsp;&nbsp;&nbsp;&nbsp;CK: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.Ord.html" title="trait core::cmp::Ord">Ord</a>,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#480-485" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and find the elements of each group
that gives the minimum and maximum from the specified function.</p>
<p>If several elements are equally maximum, the last element is picked.
If several elements are equally minimum, the first element is picked.</p>
<p>It has the same differences from the non-grouping version as <code>minmax</code>.</p>
<p>Returns a <code>HashMap</code> associating the key of each group with the minimum and maximum of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">MinMaxResult</span>::{<span class="ident">OneElement</span>, <span class="ident">MinMax</span>};
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">minmax_by_key</span>(<span class="op">|</span><span class="ident">_key</span>, <span class="kw-2">&amp;</span><span class="ident">val</span><span class="op">|</span> <span class="ident">val</span> <span class="op">%</span> <span class="number">4</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="ident">MinMax</span>(<span class="number">12</span>, <span class="number">3</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="ident">MinMax</span>(<span class="number">4</span>, <span class="number">7</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="ident">OneElement</span>(<span class="number">5</span>));
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.sum" class="method"><code>pub fn <a href="#method.sum" class="fnname">sum</a>(self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, V&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;V: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Add.html" title="trait core::ops::arith::Add">Add</a>&lt;V, Output = V&gt;,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#506-510" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and sums them.</p>
<p>This is just a shorthand for <code>self.fold_first(|acc, _, val| acc + val)</code>.
It is more limited than <code>Iterator::sum</code> since it doesn't use the <code>Sum</code> trait.</p>
<p>Returns a <code>HashMap</code> associating the key of each group with the sum of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">sum</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">3</span> <span class="op">+</span> <span class="number">9</span> <span class="op">+</span> <span class="number">12</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">1</span> <span class="op">+</span> <span class="number">4</span> <span class="op">+</span> <span class="number">7</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="number">5</span> <span class="op">+</span> <span class="number">8</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div><h4 id="method.product" class="method"><code>pub fn <a href="#method.product" class="fnname">product</a>(self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/std/collections/hash/map/struct.HashMap.html" title="struct std::collections::hash::map::HashMap">HashMap</a>&lt;K, V&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;V: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/arith/trait.Mul.html" title="trait core::ops::arith::Mul">Mul</a>&lt;V, Output = V&gt;,&nbsp;</span></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#531-535" title="goto source code">[src]</a></h4><div class="docblock"><p>Groups elements from the <code>GroupingMap</code> source by key and multiply them.</p>
<p>This is just a shorthand for <code>self.fold_first(|acc, _, val| acc * val)</code>.
It is more limited than <code>Iterator::product</code> since it doesn't use the <code>Product</code> trait.</p>
<p>Returns a <code>HashMap</code> associating the key of each group with the product of that group's elements.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">Itertools</span>;
<span class="kw">let</span> <span class="ident">lookup</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>, <span class="number">12</span>].<span class="ident">into_iter</span>()
.<span class="ident">into_grouping_map_by</span>(<span class="op">|</span><span class="kw-2">&amp;</span><span class="ident">n</span><span class="op">|</span> <span class="ident">n</span> <span class="op">%</span> <span class="number">3</span>)
.<span class="ident">product</span>();
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">0</span>], <span class="number">3</span> <span class="op">*</span> <span class="number">9</span> <span class="op">*</span> <span class="number">12</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">1</span>], <span class="number">1</span> <span class="op">*</span> <span class="number">4</span> <span class="op">*</span> <span class="number">7</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>[<span class="kw-2">&amp;</span><span class="number">2</span>], <span class="number">5</span> <span class="op">*</span> <span class="number">8</span>);
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">lookup</span>.<span class="ident">len</span>(), <span class="number">3</span>);</pre></div>
</div></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><h3 id="impl-Clone" class="impl"><code class="in-band">impl&lt;I:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a> for <a class="struct" href="../../itertools/structs/struct.GroupingMap.html" title="struct itertools::structs::GroupingMap">GroupingMap</a>&lt;I&gt;</code><a href="#impl-Clone" class="anchor"></a><a class="srclink" href="../../src/itertools/grouping_map.rs.html#50" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.clone" class="method hidden"><code>fn <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone" class="fnname">clone</a>(&amp;self) -&gt; <a class="struct" href="../../itertools/structs/struct.GroupingMap.html" title="struct itertools::structs::GroupingMap">GroupingMap</a>&lt;I&gt;</code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#50" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Returns a copy of the value. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#tymethod.clone">Read more</a></p>
</div><h4 id="method.clone_from" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from" class="fnname">clone_from</a>(&amp;mut self, source: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>Self)</code><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/clone.rs.html#128" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs copy-assignment from <code>source</code>. <a href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html#method.clone_from">Read more</a></p>
</div></div><h3 id="impl-Debug" class="impl"><code class="in-band">impl&lt;I:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="../../itertools/structs/struct.GroupingMap.html" title="struct itertools::structs::GroupingMap">GroupingMap</a>&lt;I&gt;</code><a href="#impl-Debug" class="anchor"></a><a class="srclink" href="../../src/itertools/grouping_map.rs.html#50" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.fmt" class="method hidden"><code>fn <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt" class="fnname">fmt</a>(&amp;self, f: &amp;mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>&lt;'_&gt;) -&gt; <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code><a class="srclink" href="../../src/itertools/grouping_map.rs.html#50" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
</div></div></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><h3 id="impl-RefUnwindSafe" class="impl"><code class="in-band">impl&lt;I&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.RefUnwindSafe.html" title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="../../itertools/structs/struct.GroupingMap.html" title="struct itertools::structs::GroupingMap">GroupingMap</a>&lt;I&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.RefUnwindSafe.html" title="trait std::panic::RefUnwindSafe">RefUnwindSafe</a>,&nbsp;</span></code><a href="#impl-RefUnwindSafe" class="anchor"></a><a class="srclink" href="../../src/itertools/lib.rs.html#1" title="goto source code">[src]</a></h3><div class="impl-items"></div><h3 id="impl-Send" class="impl"><code class="in-band">impl&lt;I&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../../itertools/structs/struct.GroupingMap.html" title="struct itertools::structs::GroupingMap">GroupingMap</a>&lt;I&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,&nbsp;</span></code><a href="#impl-Send" class="anchor"></a><a class="srclink" href="../../src/itertools/lib.rs.html#1" title="goto source code">[src]</a></h3><div class="impl-items"></div><h3 id="impl-Sync" class="impl"><code class="in-band">impl&lt;I&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../../itertools/structs/struct.GroupingMap.html" title="struct itertools::structs::GroupingMap">GroupingMap</a>&lt;I&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a>,&nbsp;</span></code><a href="#impl-Sync" class="anchor"></a><a class="srclink" href="../../src/itertools/lib.rs.html#1" title="goto source code">[src]</a></h3><div class="impl-items"></div><h3 id="impl-Unpin" class="impl"><code class="in-band">impl&lt;I&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="../../itertools/structs/struct.GroupingMap.html" title="struct itertools::structs::GroupingMap">GroupingMap</a>&lt;I&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a>,&nbsp;</span></code><a href="#impl-Unpin" class="anchor"></a><a class="srclink" href="../../src/itertools/lib.rs.html#1" title="goto source code">[src]</a></h3><div class="impl-items"></div><h3 id="impl-UnwindSafe" class="impl"><code class="in-band">impl&lt;I&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a> for <a class="struct" href="../../itertools/structs/struct.GroupingMap.html" title="struct itertools::structs::GroupingMap">GroupingMap</a>&lt;I&gt; <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/std/panic/trait.UnwindSafe.html" title="trait std::panic::UnwindSafe">UnwindSafe</a>,&nbsp;</span></code><a href="#impl-UnwindSafe" class="anchor"></a><a class="srclink" href="../../src/itertools/lib.rs.html#1" title="goto source code">[src]</a></h3><div class="impl-items"></div></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><h3 id="impl-Any" class="impl"><code class="in-band">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code><a href="#impl-Any" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#131-135" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.type_id" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id" class="fnname">type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#132" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></p>
</div></div><h3 id="impl-Borrow%3CT%3E" class="impl"><code class="in-band">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code><a href="#impl-Borrow%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#207-211" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.borrow" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&amp;self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;</a>T</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#208" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></p>
</div></div><h3 id="impl-BorrowMut%3CT%3E" class="impl"><code class="in-band">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a>&lt;T&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,&nbsp;</span></code><a href="#impl-BorrowMut%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#214-218" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.borrow_mut" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fnname">borrow_mut</a>(&amp;mut self) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>T</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#215" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></p>
</div></div><h3 id="impl-From%3CT%3E" class="impl"><code class="in-band">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt; for T</code><a href="#impl-From%3CT%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#545-549" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.from" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: T) -&gt; T</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#546" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3 id="impl-Into%3CU%3E" class="impl"><code class="in-band">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a>&lt;T&gt;,&nbsp;</span></code><a href="#impl-Into%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#534-541" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="method.into" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into" class="fnname">into</a>(self) -&gt; U</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#538" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3 id="impl-ToOwned" class="impl"><code class="in-band">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html" title="trait alloc::borrow::ToOwned">ToOwned</a> for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>,&nbsp;</span></code><a href="#impl-ToOwned" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#80-92" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="associatedtype.Owned" class="type"><code>type <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#associatedtype.Owned" class="type">Owned</a> = T</code></h4><div class='docblock'><p>The resulting type after obtaining ownership.</p>
</div><h4 id="method.to_owned" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned" class="fnname">to_owned</a>(&amp;self) -&gt; T</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#85" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Creates owned data from borrowed data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#tymethod.to_owned">Read more</a></p>
</div><h4 id="method.clone_into" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into" class="fnname">clone_into</a>(&amp;self, target: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut </a>T)</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/borrow.rs.html#89" title="goto source code">[src]</a></h4><div class="item-info hidden"><div class="stab unstable"><details><summary><span class="emoji">🔬</span> This is a nightly-only experimental API. (<code>toowned_clone_into</code>)</summary><p>recently added</p>
</details></div></div><div class='docblock hidden'><p>Uses borrowed data to replace owned data, usually by cloning. <a href="https://doc.rust-lang.org/nightly/alloc/borrow/trait.ToOwned.html#method.clone_into">Read more</a></p>
</div></div><h3 id="impl-TryFrom%3CU%3E" class="impl"><code class="in-band">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a>&lt;T&gt;,&nbsp;</span></code><a href="#impl-TryFrom%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#582-591" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="associatedtype.Error" class="type"><code>type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" class="type">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div><h4 id="method.try_from" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, &lt;T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;U&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#588" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
</div></div><h3 id="impl-TryInto%3CU%3E" class="impl"><code class="in-band">impl&lt;T, U&gt; <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a>&lt;U&gt; for T <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;,&nbsp;</span></code><a href="#impl-TryInto%3CU%3E" class="anchor"></a><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#568-577" title="goto source code">[src]</a></h3><div class="impl-items"><h4 id="associatedtype.Error-1" class="type"><code>type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error" class="type">Error</a> = &lt;U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></code></h4><div class='docblock'><p>The type returned in the event of a conversion error.</p>
</div><h4 id="method.try_into" class="method hidden"><code>pub fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;U, &lt;U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a>&lt;T&gt;&gt;::<a class="type" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>&gt;</code><a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#574" title="goto source code">[src]</a></h4><div class='docblock hidden'><p>Performs the conversion.</p>
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