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<h1 class='fqn'><span class='in-band'>Function <a href='index.html'>itertools</a>::<wbr><a class="fn" href=''>fold</a></span><span class='out-of-band'><span id='render-detail'>
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</span><a class='srclink' href='../src/itertools/free.rs.html#125-130' title='goto source code'>[src]</a></span></h1>
<pre class='rust fn'>pub fn fold&lt;I, B, F&gt;(iterable: I, init: B, f: F) -&gt; B <span class="where fmt-newline">where<br>&nbsp;&nbsp;&nbsp;&nbsp;I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html" title="trait core::iter::traits::IntoIterator">IntoIterator</a>,<br>&nbsp;&nbsp;&nbsp;&nbsp;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>(B, I::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html#associatedtype.Item" title="type core::iter::traits::IntoIterator::Item">Item</a>) -&gt; B,&nbsp;</span></pre><div class='docblock'><p>Perform a fold operation over the iterable.</p>
<p><code>IntoIterator</code> enabled version of <code>i.fold(init, f)</code></p>
<pre class="rust rust-example-rendered">
<span class="kw">use</span> <span class="ident">itertools</span>::<span class="ident">fold</span>;
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">fold</span>(<span class="kw-2">&amp;</span>[<span class="number">1.</span>, <span class="number">2.</span>, <span class="number">3.</span>], <span class="number">0.</span>, <span class="op">|</span><span class="ident">a</span>, <span class="kw-2">&amp;</span><span class="ident">b</span><span class="op">|</span> <span class="ident">f32</span>::<span class="ident">max</span>(<span class="ident">a</span>, <span class="ident">b</span>)), <span class="number">3.</span>);</pre>
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