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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 `diff_with` fn in crate `itertools`."><meta name="keywords" content="rust, rustlang, rust-lang, diff_with"><title>itertools::diff_with - 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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<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">Function <a href="index.html">itertools</a>::<wbr><a class="fn" href="">diff_with</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">−</span>]</a></span><a class="srclink" href="../src/itertools/diff.rs.html#40-61" title="goto source code">[src]</a></span></h1><pre class="rust fn">pub fn diff_with<I, J, F>(<br> i: I, <br> j: J, <br> is_equal: F<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="enum" href="../itertools/enum.Diff.html" title="enum itertools::Diff">Diff</a><I::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.IntoIter" title="type core::iter::traits::collect::IntoIterator::IntoIter">IntoIter</a>, J::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.IntoIter" title="type core::iter::traits::collect::IntoIterator::IntoIter">IntoIter</a>>> <span class="where fmt-newline">where<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>,<br> J: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html" title="trait core::iter::traits::collect::IntoIterator">IntoIterator</a>,<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.Fn.html" title="trait core::ops::function::Fn">Fn</a>(&I::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" title="type core::iter::traits::collect::IntoIterator::Item">Item</a>, &J::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/collect/trait.IntoIterator.html#associatedtype.Item" title="type core::iter::traits::collect::IntoIterator::Item">Item</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>, </span></pre><div class="docblock"><p>Compares every element yielded by both <code>i</code> and <code>j</code> with the given function in lock-step and
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returns a <code>Diff</code> which describes how <code>j</code> differs from <code>i</code>.</p>
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<p>If the number of elements yielded by <code>j</code> is less than the number of elements yielded by <code>i</code>,
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the number of <code>j</code> elements yielded will be returned along with <code>i</code>'s remaining elements as
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<code>Diff::Shorter</code>.</p>
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<p>If the two elements of a step differ, the index of those elements along with the remaining
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elements of both <code>i</code> and <code>j</code> are returned as <code>Diff::FirstMismatch</code>.</p>
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<p>If <code>i</code> becomes exhausted before <code>j</code> becomes exhausted, the number of elements in <code>i</code> along with
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the remaining <code>j</code> elements will be returned as <code>Diff::Longer</code>.</p>
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