133 lines
7.2 KiB
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133 lines
7.2 KiB
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<h1 class='fqn'><span class='in-band'>Function <a href='index.html'>itertools</a>::<wbr><a class="fn" href=''>iterate</a></span><span class='out-of-band'><span id='render-detail'>
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<div class="important-traits"><div class='tooltip'>ⓘ<span class='tooltiptext'>Important traits for <a class="struct" href="../itertools/structs/struct.Iterate.html" title="struct itertools::structs::Iterate">Iterate</a><St, F></span></div><div class="content hidden"><h3 class="important">Important traits for <a class="struct" href="../itertools/structs/struct.Iterate.html" title="struct itertools::structs::Iterate">Iterate</a><St, F></h3><code class="content"><span class="where fmt-newline">impl<St, F> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a> for <a class="struct" href="../itertools/structs/struct.Iterate.html" title="struct itertools::structs::Iterate">Iterate</a><St, F> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>St) -> St, </span></span><span class="where fmt-newline"> type <a href='https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item' class="type">Item</a> = St;</span></code></div></div><pre class='rust fn'>pub fn iterate<St, F>(initial_value: St, f: F) -> <a class="struct" href="../itertools/structs/struct.Iterate.html" title="struct itertools::structs::Iterate">Iterate</a><St, F> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>St) -> St, </span></pre><div class='docblock'><p>Creates a new iterator that infinitely applies function to value and yields results.</p>
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<pre class="rust rust-example-rendered">
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<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">iterate</span>;
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<span class="ident">itertools</span>::<span class="ident">assert_equal</span>(<span class="ident">iterate</span>(<span class="number">1</span>, <span class="op">|</span><span class="kw-2">&</span><span class="ident">i</span><span class="op">|</span> <span class="ident">i</span> <span class="op">*</span> <span class="number">3</span>).<span class="ident">take</span>(<span class="number">5</span>), <span class="macro">vec</span><span class="macro">!</span>[<span class="number">1</span>, <span class="number">3</span>, <span class="number">9</span>, <span class="number">27</span>, <span class="number">81</span>]);</pre>
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