<!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="Force downcast of an `Array`, such as an `ArrayRef` to `RunArray&lt;T&gt;`, panic’ing on failure."><title>as_run_array in arrow::array - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-dd39b87e5fcfba68.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="arrow" data-themes="" data-resource-suffix="" data-rustdoc-version="1.81.0-nightly (d7f6ebace 2024-06-16)" data-channel="nightly" data-search-js="search-0fe7219eb170c82e.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../../static.files/storage-118b08c4c78b968e.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-20a3ad099b048cf2.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-df360f571f6edeae.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../arrow/index.html">arrow</a><span class="version">52.0.0</span></h2></div><div class="sidebar-elems"><h2><a href="index.html">In arrow::array</a></h2></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1>Function <a href="../index.html">arrow</a>::<wbr><a href="index.html">array</a>::<wbr><a class="fn" href="#">as_run_array</a><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><span class="out-of-band"><button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code>pub fn as_run_array&lt;T&gt;(arr: &amp;dyn <a class="trait" href="trait.Array.html" title="trait arrow::array::Array">Array</a>) -&gt; &amp;<a class="struct" href="struct.RunArray.html" title="struct arrow::array::RunArray">RunArray</a>&lt;T&gt;<div class="where">where
    T: <a class="trait" href="../datatypes/trait.RunEndIndexType.html" title="trait arrow::datatypes::RunEndIndexType">RunEndIndexType</a>,</div></code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Force downcast of an <a href="trait.Array.html" title="trait arrow::array::Array"><code>Array</code></a>, such as an <a href="type.ArrayRef.html" title="type arrow::array::ArrayRef"><code>ArrayRef</code></a> to
<a href="struct.RunArray.html" title="struct arrow::array::RunArray"><code>RunArray&lt;T&gt;</code></a>, panic’ing on failure.</p>
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code>
<span class="kw">let </span>arr: RunArray&lt;Int32Type&gt; = <span class="macro">vec!</span>[<span class="prelude-val">Some</span>(<span class="string">"foo"</span>)].into_iter().collect();
<span class="kw">let </span>arr: ArrayRef = std::sync::Arc::new(arr);
<span class="kw">let </span>run_array: <span class="kw-2">&amp;</span>RunArray&lt;Int32Type&gt; = as_run_array::&lt;Int32Type&gt;(<span class="kw-2">&amp;</span>arr);</code></pre></div>
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