<!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 `SliceConcatExt` trait in crate `alloc`."> <meta name="keywords" content="rust, rustlang, rust-lang, SliceConcatExt"> <title>alloc::slice::SliceConcatExt - 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="../../dark.css"> <link rel="stylesheet" type="text/css" href="../../main.css" id="themeStyle"> <script src="../../storage.js"></script> <link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"> </head> <body class="rustdoc trait"> <!--[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">☰</div> <a href='../../alloc/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a> <p class='location'>Trait SliceConcatExt</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#associated-types">Associated Types</a><div class="sidebar-links"><a href="#associatedtype.Output">Output</a></div><a class="sidebar-title" href="#required-methods">Required Methods</a><div class="sidebar-links"><a href="#tymethod.concat">concat</a><a href="#tymethod.join">join</a><a href="#tymethod.connect">connect</a></div><a class="sidebar-title" href="#implementors">Implementors</a></div><p class='location'><a href='../index.html'>alloc</a>::<wbr><a href='index.html'>slice</a></p><script>window.sidebarCurrent = {name: 'SliceConcatExt', ty: 'trait', relpath: ''};</script><script defer src="sidebar-items.js"></script></div> </nav> <div class="theme-picker"> <button id="theme-picker" aria-label="Pick another theme!"> <img src="../../brush.svg" width="18" alt="Pick another theme!"> </button> <div id="theme-choices"></div> </div> <script src="../../theme.js"></script> <nav class="sub"> <form class="search-form js-only"> <div class="search-container"> <input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"> </div> </form> </nav> <section id='main' class="content"> <h1 class='fqn'><span class='in-band'>Trait <a href='../index.html'>alloc</a>::<wbr><a href='index.html'>slice</a>::<wbr><a class="trait" href=''>SliceConcatExt</a></span><span class='out-of-band'><span class='since' title='Stable since Rust version '></span><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/alloc/slice.rs.html#1848-1881' title='goto source code'>[src]</a></span></h1> <pre class='rust trait'>pub trait SliceConcatExt<T: ?<a class="trait" href="../../core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>> { type <a href='#associatedtype.Output' class="type">Output</a>; fn <a href='#tymethod.concat' class='fnname'>concat</a>(&self) -> Self::<a class="type" href="../../alloc/slice/trait.SliceConcatExt.html#associatedtype.Output" title="type alloc::slice::SliceConcatExt::Output">Output</a>; <div class='item-spacer'></div> fn <a href='#tymethod.join' class='fnname'>join</a>(&self, sep: &T) -> Self::<a class="type" href="../../alloc/slice/trait.SliceConcatExt.html#associatedtype.Output" title="type alloc::slice::SliceConcatExt::Output">Output</a>; <div class='item-spacer'></div> fn <a href='#tymethod.connect' class='fnname'>connect</a>(&self, sep: &T) -> Self::<a class="type" href="../../alloc/slice/trait.SliceConcatExt.html#associatedtype.Output" title="type alloc::slice::SliceConcatExt::Output">Output</a>; }</pre><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>slice_concat_ext </code><a href="https://github.com/rust-lang/rust/issues/27747">#27747</a>)</summary><p>trait should not have to exist</p> </details></div></div><div class='docblock'><p>An extension trait for concatenating slices</p> <p>While this trait is unstable, the methods are stable. <code>SliceConcatExt</code> is included in the <a href="../../std/prelude/index.html">standard library prelude</a>, so you can use <a href="#tymethod.join"><code>join()</code></a> and <a href="#tymethod.concat"><code>concat()</code></a> as if they existed on <code>[T]</code> itself.</p> </div> <h2 id='associated-types' class='small-section-header'> Associated Types<a href='#associated-types' class='anchor'></a> </h2> <div class='methods'> <h3 id='associatedtype.Output' class='method'><span id='Output.t' class='invisible'><code>type <a href='#associatedtype.Output' class="type">Output</a></code></span></h3><div class='stability'><div class='stab unstable'><details><summary><span class=microscope>🔬</span> This is a nightly-only experimental API. (<code>slice_concat_ext </code><a href="https://github.com/rust-lang/rust/issues/27747">#27747</a>)</summary><p>trait should not have to exist</p> </details></div></div><div class='docblock'><p>The resulting type after concatenation</p> </div></div> <h2 id='required-methods' class='small-section-header'> Required Methods<a href='#required-methods' class='anchor'></a> </h2> <div class='methods'> <h3 id='tymethod.concat' class='method'><span id='concat.v' class='invisible'><code>fn <a href='#tymethod.concat' class='fnname'>concat</a>(&self) -> Self::<a class="type" href="../../alloc/slice/trait.SliceConcatExt.html#associatedtype.Output" title="type alloc::slice::SliceConcatExt::Output">Output</a></code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h3><div class='docblock'><p>Flattens a slice of <code>T</code> into a single value <code>Self::Output</code>.</p> <h1 id="examples" class="section-header"><a href="#examples">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="macro">assert_eq</span><span class="macro">!</span>([<span class="string">"hello"</span>, <span class="string">"world"</span>].<span class="ident">concat</span>(), <span class="string">"helloworld"</span>); <span class="macro">assert_eq</span><span class="macro">!</span>([[<span class="number">1</span>, <span class="number">2</span>], [<span class="number">3</span>, <span class="number">4</span>]].<span class="ident">concat</span>(), [<span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>]);</pre> </div><h3 id='tymethod.join' class='method'><span id='join.v' class='invisible'><code>fn <a href='#tymethod.join' class='fnname'>join</a>(&self, sep: &T) -> Self::<a class="type" href="../../alloc/slice/trait.SliceConcatExt.html#associatedtype.Output" title="type alloc::slice::SliceConcatExt::Output">Output</a></code><div class='since' title='Stable since Rust version 1.3.0'>1.3.0</div></span></h3><div class='docblock'><p>Flattens a slice of <code>T</code> into a single value <code>Self::Output</code>, placing a given separator between each.</p> <h1 id="examples-1" class="section-header"><a href="#examples-1">Examples</a></h1> <pre class="rust rust-example-rendered"> <span class="macro">assert_eq</span><span class="macro">!</span>([<span class="string">"hello"</span>, <span class="string">"world"</span>].<span class="ident">join</span>(<span class="string">" "</span>), <span class="string">"hello world"</span>); <span class="macro">assert_eq</span><span class="macro">!</span>([[<span class="number">1</span>, <span class="number">2</span>], [<span class="number">3</span>, <span class="number">4</span>]].<span class="ident">join</span>(<span class="kw-2">&</span><span class="number">0</span>), [<span class="number">1</span>, <span class="number">2</span>, <span class="number">0</span>, <span class="number">3</span>, <span class="number">4</span>]);</pre> </div><h3 id='tymethod.connect' class='method'><span id='connect.v' class='invisible'><code>fn <a href='#tymethod.connect' class='fnname'>connect</a>(&self, sep: &T) -> Self::<a class="type" href="../../alloc/slice/trait.SliceConcatExt.html#associatedtype.Output" title="type alloc::slice::SliceConcatExt::Output">Output</a></code><div class='since' title='Stable since Rust version 1.0.0'>1.0.0</div></span></h3><div class='stability'><div class='stab deprecated'>Deprecated since 1.3.0<p>: renamed to join</p> </div></div></div> <h2 id='implementors' class='small-section-header'> Implementors<a href='#implementors' class='anchor'></a> </h2> <ul class='item-list' id='implementors-list'> <li><div class='out-of-band'><a class='srclink' href='../../src/alloc/slice.rs.html#1886-1916' title='goto source code'>[src]</a></div><code>impl<T: <a class="trait" href="../../core/clone/trait.Clone.html" title="trait core::clone::Clone">Clone</a>, V: <a class="trait" href="../../alloc/borrow/trait.Borrow.html" title="trait alloc::borrow::Borrow">Borrow</a><[T]>> SliceConcatExt<T> for [V]<span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="struct" href="../../alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><T>;</span></code></li> <li><div class='out-of-band'><a class='srclink' href='../../src/alloc/str.rs.html#85-135' title='goto source code'>[src]</a></div><code>impl<S: <a class="trait" href="../../alloc/borrow/trait.Borrow.html" title="trait alloc::borrow::Borrow">Borrow</a><str>> SliceConcatExt<str> for [S]<span class="where fmt-newline"> type <a href='#associatedtype.Output' class="type">Output</a> = <a class="struct" href="../../alloc/string/struct.String.html" title="struct alloc::string::String">String</a>;</span></code></li> </ul><script type="text/javascript" async src="../../implementors/alloc/slice/trait.SliceConcatExt.js"> </script></section> <section id='search' class="content hidden"></section> <section class="footer"></section> <aside id="help" class="hidden"> <div> <h1 class="hidden">Help</h1> <div class="shortcuts"> <h2>Keyboard Shortcuts</h2> <dl> <dt><kbd>?</kbd></dt> <dd>Show this help dialog</dd> <dt><kbd>S</kbd></dt> <dd>Focus the search field</dd> <dt><kbd>↑</kbd></dt> <dd>Move up in search results</dd> <dt><kbd>↓</kbd></dt> <dd>Move down in search results</dd> <dt><kbd>↹</kbd></dt> <dd>Switch tab</dd> <dt><kbd>⏎</kbd></dt> <dd>Go to active search result</dd> <dt><kbd>+</kbd></dt> <dd>Expand all sections</dd> <dt><kbd>-</kbd></dt> <dd>Collapse all sections</dd> </dl> </div> <div class="infos"> <h2>Search Tricks</h2> <p> Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type. </p> <p> Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>. </p> <p> Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>) </p> </div> </div> </aside> <script> window.rootPath = "../../"; 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