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<p class='location'>Struct GroupBy</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-IntoIterator">IntoIterator</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">Send</a><a href="#impl-Sync">!Sync</a></div></div><p class='location'><a href='../index.html'>itertools</a>::<wbr><a href='index.html'>structs</a></p><script>window.sidebarCurrent = {name: 'GroupBy', ty: 'struct', relpath: ''};</script><script defer src="sidebar-items.js"></script></div>
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<section id='main' class="content"><h1 class='fqn'><span class='in-band'>Struct <a href='../index.html'>itertools</a>::<wbr><a href='index.html'>structs</a>::<wbr><a class="struct" href=''>GroupBy</a></span><span class='out-of-band'><span id='render-detail'>
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[<span class='inner'>−</span>]
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</span><a class='srclink' href='../../src/itertools/groupbylazy.rs.html#289-296' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust struct'><div class="docblock attributes">#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
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</div>pub struct GroupBy<K, I, F> <span class="where fmt-newline">where<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a>, </span> { /* fields omitted */ }</pre></div><div class='docblock'><p><code>GroupBy</code> is the storage for the lazy grouping operation.</p>
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<p>If the groups are consumed in their original order, or if each
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group is dropped without keeping it around, then <code>GroupBy</code> uses
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no allocations. It needs allocations only if several group iterators
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are alive at the same time.</p>
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<p>This type implements <code>IntoIterator</code> (it is <strong>not</strong> an iterator
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itself), because the group iterators need to borrow from this
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value. It should be stored in a local variable or temporary and
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iterated.</p>
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<p>See <a href="../trait.Itertools.html#method.group_by"><code>.group_by()</code></a> for more information.</p>
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Trait Implementations<a href='#implementations' class='anchor'></a>
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<h3 id='impl-IntoIterator' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<'a, K, I, F> <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html" title="trait core::iter::traits::IntoIterator">IntoIterator</a> for &'a <a class="struct" href="../../itertools/structs/struct.GroupBy.html" title="struct itertools::structs::GroupBy">GroupBy</a><K, I, F> <span class="where fmt-newline">where<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a>,<br> I::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>: 'a,<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>(&I::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>) -> K,<br> K: <a class="trait" href="https://doc.rust-lang.org/nightly/core/cmp/trait.PartialEq.html" title="trait core::cmp::PartialEq">PartialEq</a>, </span></code><a href='#impl-IntoIterator' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/itertools/groupbylazy.rs.html#337-349' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='associatedtype.Item' class="type"><span id='Item.t' class='invisible'><code>type <a href='https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html#associatedtype.Item' class="type">Item</a> = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">(</a>K, <a class="struct" href="../../itertools/structs/struct.Group.html" title="struct itertools::structs::Group">Group</a><'a, K, I, F><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.tuple.html">)</a></code></span></h4>
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<div class='docblock'><p>The type of the elements being iterated over.</p>
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</div><h4 id='associatedtype.IntoIter' class="type"><span id='IntoIter.t' class='invisible'><code>type <a href='https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html#associatedtype.IntoIter' class="type">IntoIter</a> = <a class="struct" href="../../itertools/structs/struct.Groups.html" title="struct itertools::structs::Groups">Groups</a><'a, K, I, F></code></span></h4>
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<div class='docblock'><p>Which kind of iterator are we turning this into?</p>
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</div><h4 id='method.into_iter' class="method"><span id='into_iter.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html#tymethod.into_iter' class='fnname'>into_iter</a>(self) -> Self::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html#associatedtype.IntoIter" title="type core::iter::traits::IntoIterator::IntoIter">IntoIter</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../../src/itertools/groupbylazy.rs.html#346-348' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Creates an iterator from a value. <a href="https://doc.rust-lang.org/nightly/core/iter/traits/trait.IntoIterator.html#tymethod.into_iter">Read more</a></p>
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<h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<K, I, F> <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="../../itertools/structs/struct.GroupBy.html" title="struct itertools::structs::GroupBy">GroupBy</a><K, I, F> <span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br> K: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>,<br> <I as <a class="trait" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html" title="trait core::iter::iterator::Iterator">Iterator</a>>::<a class="type" href="https://doc.rust-lang.org/nightly/core/iter/iterator/trait.Iterator.html#associatedtype.Item" title="type core::iter::iterator::Iterator::Item">Item</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a>, </span></code><a href='#impl-Send' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl<K, I, F> !<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="../../itertools/structs/struct.GroupBy.html" title="struct itertools::structs::GroupBy">GroupBy</a><K, I, F></code><a href='#impl-Sync' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div></div></section>
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