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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="An iterator source that produces elements indefinitely by calling a given closure."><title>repeat_call in itertools - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="itertools" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-feafe1bb7466e4bd.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-16x16-8b506e7a72182f1c.png"><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">☰</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../itertools/index.html">itertools</a><span class="version">0.12.1</span></h2></div><div class="sidebar-elems"></div></nav><div class="sidebar-resizer"></div>
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<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../itertools/all.html" title="show sidebar"></a></div><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" tabindex="-1"><a href="../help.html" title="help">?</a></div><div id="settings-menu" tabindex="-1"><a href="../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Function <a href="index.html">itertools</a>::<wbr><a class="fn" href="#">repeat_call</a><button id="copy-path" title="Copy item path to clipboard"><img src="../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../src/itertools/sources.rs.html#42-47">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>−</span>]</button></span></div><pre class="rust item-decl"><code>pub fn repeat_call<F, A>(function: F) -> <a class="struct" href="structs/struct.RepeatCall.html" title="struct itertools::structs::RepeatCall">RepeatCall</a><F> <a href="#" class="tooltip" data-notable-ty="RepeatCall<F>">ⓘ</a><div class="where">where
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F: <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>() -> A,</div></code></pre><span class="item-info"><div class="stab deprecated"><span class="emoji">👎</span><span>Deprecated since 0.8.0: Use std repeat_with() instead</span></div></span><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>An iterator source that produces elements indefinitely by calling
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a given closure.</p>
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<p>Iterator element type is the return type of the closure.</p>
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<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">use </span>itertools::repeat_call;
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<span class="kw">use </span>itertools::Itertools;
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<span class="kw">use </span>std::collections::BinaryHeap;
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<span class="kw">let </span><span class="kw-2">mut </span>heap = BinaryHeap::from(<span class="macro">vec!</span>[<span class="number">2</span>, <span class="number">5</span>, <span class="number">3</span>, <span class="number">7</span>, <span class="number">8</span>]);
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<span class="comment">// extract each element in sorted order
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</span><span class="kw">for </span>element <span class="kw">in </span>repeat_call(|| heap.pop()).while_some() {
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<span class="macro">print!</span>(<span class="string">"{}"</span>, element);
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}
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itertools::assert_equal(
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repeat_call(|| <span class="number">1</span>).take(<span class="number">5</span>),
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<span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>, <span class="number">1</span>]
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);</code></pre></div>
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</div></details><script type="text/json" id="notable-traits-data">{"RepeatCall<F>":"<h3>Notable traits for <code><a class=\"struct\" href=\"structs/struct.RepeatCall.html\" title=\"struct itertools::structs::RepeatCall\">RepeatCall</a><F></code></h3><pre><code><div class=\"where\">impl<A, F> <a class=\"trait\" href=\"https://doc.rust-lang.org/1.76.0/core/iter/traits/iterator/trait.Iterator.html\" title=\"trait core::iter::traits::iterator::Iterator\">Iterator</a> for <a class=\"struct\" href=\"structs/struct.RepeatCall.html\" title=\"struct itertools::structs::RepeatCall\">RepeatCall</a><F><div class=\"where\">where\n F: <a class=\"trait\" href=\"https://doc.rust-lang.org/1.76.0/core/ops/function/trait.FnMut.html\" title=\"trait core::ops::function::FnMut\">FnMut</a>() -> A,</div></div><div class=\"where\"> type <a href=\"https://doc.rust-lang.org/1.76.0/core/iter/traits/iterator/trait.Iterator.html#associatedtype.Item\" class=\"associatedtype\">Item</a> = A;</div>"}</script></section></div></main></body></html> |