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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="Assigns a rank to each value in `array` based on its position in the sorted order"><title>rank in datatypes::compute - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="datatypes" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.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]--><rustdoc-topbar><h2><a href="#">rank</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../datatypes/index.html">datatypes</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In datatypes::<wbr>compute</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">datatypes</a>::<wbr><a href="index.html">compute</a></div><h1>Function <span class="fn">rank</span> <button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub fn rank(
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array: &dyn Array,
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options: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="struct" href="struct.SortOptions.html" title="struct datatypes::compute::SortOptions">SortOptions</a>>,
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) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><<a class="struct" href="https://doc.rust-lang.org/nightly/alloc/vec/struct.Vec.html" title="struct alloc::vec::Vec">Vec</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u32.html">u32</a>>, ArrowError></code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Assigns a rank to each value in <code>array</code> based on its position in the sorted order</p>
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<p>Where values are equal, they will be assigned the highest of their ranks,
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leaving gaps in the overall rank assignment</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>array = StringArray::from(<span class="macro">vec!</span>[<span class="prelude-val">Some</span>(<span class="string">"foo"</span>), <span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(<span class="string">"foo"</span>), <span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(<span class="string">"bar"</span>)]);
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<span class="kw">let </span>ranks = rank(<span class="kw-2">&</span>array, <span class="prelude-val">None</span>).unwrap();
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<span class="macro">assert_eq!</span>(ranks, <span class="kw-2">&</span>[<span class="number">5</span>, <span class="number">2</span>, <span class="number">5</span>, <span class="number">2</span>, <span class="number">3</span>]);</code></pre></div></div></details></section></div></main></body></html> |