<!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="The concrete iterator types."><meta name="keywords" content="rust, rustlang, rust-lang, structs"><title>itertools::structs - Rust</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><script src="../../crates.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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</div></details><h2 id="structs" class="section-header"><a href="#structs">Structs</a></h2>
<table><tr class="module-item"><td><a class="struct" href="struct.Batching.html" title="itertools::structs::Batching struct">Batching</a></td><td class="docblock-short"><p>A “meta iterator adaptor”. Its closure receives a reference to the iterator
and may pick off as many elements as it likes, to produce the next iterator element.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Coalesce.html" title="itertools::structs::Coalesce struct">Coalesce</a></td><td class="docblock-short"><p>An iterator adaptor that may join together adjacent elements.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.ConsTuples.html" title="itertools::structs::ConsTuples struct">ConsTuples</a></td><td class="docblock-short"><p>An iterator that maps an iterator of tuples like
<code>((A, B), C)</code> to an iterator of <code>(A, B, C)</code>.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Dedup.html" title="itertools::structs::Dedup struct">Dedup</a></td><td class="docblock-short"><p>An iterator adaptor that removes repeated duplicates.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Flatten.html" title="itertools::structs::Flatten struct">Flatten</a></td><td class="docblock-short"><p>An iterator adapter to simply flatten a structure.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Format.html" title="itertools::structs::Format struct">Format</a></td><td class="docblock-short"><p>Format all iterator elements lazily, separated by <code>sep</code>.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.FormatWith.html" title="itertools::structs::FormatWith struct">FormatWith</a></td><td class="docblock-short"><p>Format all iterator elements lazily, separated by <code>sep</code>.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Interleave.html" title="itertools::structs::Interleave struct">Interleave</a></td><td class="docblock-short"><p>An iterator adaptor that alternates elements from two iterators until both
run out.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.InterleaveShortest.html" title="itertools::structs::InterleaveShortest struct">InterleaveShortest</a></td><td class="docblock-short"><p>An iterator adaptor that alternates elements from the two iterators until
one of them runs out.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Intersperse.html" title="itertools::structs::Intersperse struct">Intersperse</a></td><td class="docblock-short"><p>An iterator adaptor to insert a particular value
between each element of the adapted iterator.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Iterate.html" title="itertools::structs::Iterate struct">Iterate</a></td><td class="docblock-short"><p>An iterator that infinitely applies function to value and yields results.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.MapResults.html" title="itertools::structs::MapResults struct">MapResults</a></td><td class="docblock-short"><p>An iterator adapter to apply a transformation within a nested <code>Result</code>.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Merge.html" title="itertools::structs::Merge struct">Merge</a></td><td class="docblock-short"><p>An iterator adaptor that merges the two base iterators in ascending order.
If both base iterators are sorted (ascending), the result is sorted.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.MergeBy.html" title="itertools::structs::MergeBy struct">MergeBy</a></td><td class="docblock-short"><p>An iterator adaptor that merges the two base iterators in ascending order.
If both base iterators are sorted (ascending), the result is sorted.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.MergeJoinBy.html" title="itertools::structs::MergeJoinBy struct">MergeJoinBy</a></td><td class="docblock-short"><p>An iterator adaptor that merge-joins items from the two base iterators in ascending order.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.PadUsing.html" title="itertools::structs::PadUsing struct">PadUsing</a></td><td class="docblock-short"><p>An iterator adaptor that pads a sequence to a minimum length by filling
missing elements using a closure.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.PeekingTakeWhile.html" title="itertools::structs::PeekingTakeWhile struct">PeekingTakeWhile</a></td><td class="docblock-short"><p>An iterator adaptor that takes items while a closure returns <code>true</code>.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Positions.html" title="itertools::structs::Positions struct">Positions</a></td><td class="docblock-short"><p>An iterator adapter to get the positions of each element that matches a predicate.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.ProcessResults.html" title="itertools::structs::ProcessResults struct">ProcessResults</a></td><td class="docblock-short"><p>An iterator that produces only the <code>T</code> values as long as the
inner iterator produces <code>Ok(T)</code>.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Product.html" title="itertools::structs::Product struct">Product</a></td><td class="docblock-short"><p>An iterator adaptor that iterates over the cartesian product of
the element sets of two iterators <code>I</code> and <code>J</code>.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.PutBack.html" title="itertools::structs::PutBack struct">PutBack</a></td><td class="docblock-short"><p>An iterator adaptor that allows putting back a single
item to the front of the iterator.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.RepeatCall.html" title="itertools::structs::RepeatCall struct">RepeatCall</a></td><td class="docblock-short"><p>See <a href="../fn.repeat_call.html"><code>repeat_call</code></a> for more information.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.RepeatN.html" title="itertools::structs::RepeatN struct">RepeatN</a></td><td class="docblock-short"><p>An iterator that produces <em>n</em> repetitions of an element.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Step.html" title="itertools::structs::Step struct">Step</a></td><td class="docblock-short"><p>An iterator adaptor that steps a number elements in the base iterator
for each iteration.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.TakeWhileRef.html" title="itertools::structs::TakeWhileRef struct">TakeWhileRef</a></td><td class="docblock-short"><p>An iterator adaptor that borrows from a <code>Clone</code>-able iterator
to only pick off elements while the predicate returns <code>true</code>.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.TupleBuffer.html" title="itertools::structs::TupleBuffer struct">TupleBuffer</a></td><td class="docblock-short"><p>An iterator over a incomplete tuple.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.TupleCombinations.html" title="itertools::structs::TupleCombinations struct">TupleCombinations</a></td><td class="docblock-short"><p>An iterator to iterate through all combinations in a <code>Clone</code>-able iterator that produces tuples
of a specific size.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.TupleWindows.html" title="itertools::structs::TupleWindows struct">TupleWindows</a></td><td class="docblock-short"><p>An iterator over all contiguous windows that produces tuples of a specific size.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Tuples.html" title="itertools::structs::Tuples struct">Tuples</a></td><td class="docblock-short"><p>An iterator that groups the items in tuples of a specific size.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Unfold.html" title="itertools::structs::Unfold struct">Unfold</a></td><td class="docblock-short"><p>See <a href="../fn.unfold.html"><code>unfold</code></a> for more information.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Update.html" title="itertools::structs::Update struct">Update</a></td><td class="docblock-short"><p>An iterator adapter to apply a mutating function to each element before yielding it.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.WhileSome.html" title="itertools::structs::WhileSome struct">WhileSome</a></td><td class="docblock-short"><p>An iterator adaptor that filters <code>Option<A></code> iterator elements
and produces <code>A</code>. Stops on the first <code>None</code> encountered.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.WithPosition.html" title="itertools::structs::WithPosition struct">WithPosition</a></td><td class="docblock-short"><p>An iterator adaptor that wraps each element in an <a href="../enum.Position.html"><code>Position</code></a>.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.Zip.html" title="itertools::structs::Zip struct">Zip</a></td><td class="docblock-short"><p>See <a href="../fn.multizip.html"><code>multizip</code></a> for more information.</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.ZipEq.html" title="itertools::structs::ZipEq struct">ZipEq</a></td><td class="docblock-short"><p>An iterator which iterates two other iterators simultaneously</p>
</td></tr><tr class="module-item"><td><a class="struct" href="struct.ZipLongest.html" title="itertools::structs::ZipLongest struct">ZipLongest</a></td><td class="docblock-short"><p>An iterator which iterates two other iterators simultaneously</p>
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