Module itertools::structs

The concrete iterator types.

Structs

• Batching
  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.
• Chunk
  An iterator for the elements in a single chunk.
• ChunkBy
  ChunkBy is the storage for the lazy grouping operation.
• Chunks
  An iterator that yields the Chunk iterators.
• CircularTupleWindows
  An iterator over all windows, wrapping back to the first elements when the window would otherwise exceed the length of the iterator, producing tuples of a specific size.
• Combinations
  An iterator to iterate through all the k-length combinations in an iterator.
• CombinationsWithReplacement
  An iterator to iterate through all the n-length combinations in an iterator, with replacement.
• ConsTuples
  An iterator that maps an iterator of tuples like ((A, B), C) to an iterator of (A, B, C).
• ExactlyOneError
  Iterator returned for the error case of Itertools::exactly_one() This iterator yields exactly the same elements as the input iterator.
• FilterMapOk
  An iterator adapter to filter and apply a transformation on values within a nested Result::Ok.
• FilterOk
  An iterator adapter to filter values within a nested Result::Ok.
• FlattenOk
  An iterator adaptor that flattens Result::Ok values and allows Result::Err values through unchanged.
• Format
  Format all iterator elements lazily, separated by sep.
• FormatWith
  Format all iterator elements lazily, separated by sep.
• Group
  An iterator for the elements in a single group.
• GroupingMap
  GroupingMap is an intermediate struct for efficient group-and-fold operations. It groups elements by their key and at the same time fold each group using some aggregating operation.
• Groups
  An iterator that yields the Group iterators.
• Interleave
  An iterator adaptor that alternates elements from two iterators until both run out.
• InterleaveShortest
  An iterator adaptor that alternates elements from the two iterators until one of them runs out.
• IntersperseWith
  An iterator adaptor to insert a particular value created by a function between each element of the adapted iterator.
• IntoChunks
  ChunkLazy is the storage for a lazy chunking operation.
• Iterate
  An iterator that infinitely applies function to value and yields results.
• KMergeBy
  An iterator adaptor that merges an abitrary number of base iterators according to an ordering function.
• MergeBy
  An iterator adaptor that merges the two base iterators in ascending order. If both base iterators are sorted (ascending), the result is sorted.
• MultiPeek
  See multipeek() for more information.
• MultiProduct
  An iterator adaptor that iterates over the cartesian product of multiple iterators of type I.
• PadUsing
  An iterator adaptor that pads a sequence to a minimum length by filling missing elements using a closure.
• PeekNth
  See peek_nth() for more information.
• PeekingTakeWhile
  An iterator adaptor that takes items while a closure returns true.
• Permutations
  An iterator adaptor that iterates through all the k-permutations of the elements from an iterator.
• Positions
  An iterator adapter to get the positions of each element that matches a predicate.
• Powerset
  An iterator to iterate through the powerset of the elements from an iterator.
• ProcessResults
  An iterator that produces only the T values as long as the inner iterator produces Ok(T).
• Product
  An iterator adaptor that iterates over the cartesian product of the element sets of two iterators I and J.
• PutBack
  An iterator adaptor that allows putting back a single item to the front of the iterator.
• PutBackN
  An iterator adaptor that allows putting multiple items in front of the iterator.
• RcIter
  A wrapper for Rc<RefCell<I>>, that implements the Iterator trait.
• RepeatN
  An iterator that produces n repetitions of an element.
• TakeWhileInclusive
  An iterator adaptor that consumes elements while the given predicate is true, including the element for which the predicate first returned false.
• TakeWhileRef
  An iterator adaptor that borrows from a Clone-able iterator to only pick off elements while the predicate returns true.
• Tee
  One half of an iterator pair where both return the same elements.
• TupleBuffer
  An iterator over a incomplete tuple.
• TupleCombinations
  An iterator to iterate through all combinations in a Clone-able iterator that produces tuples of a specific size.
• TupleWindows
  An iterator over all contiguous windows that produces tuples of a specific size.
• Tuples
  An iterator that groups the items in tuples of a specific size.
• UnfoldDeprecated
  See unfold for more information.
• Unique
  An iterator adapter to filter out duplicate elements.
• UniqueBy
  An iterator adapter to filter out duplicate elements.
• Update
  An iterator adapter to apply a mutating function to each element before yielding it.
• WhileSome
  An iterator adaptor that filters Option<A> iterator elements and produces A. Stops on the first None encountered.
• WithPosition
  An iterator adaptor that wraps each element in an Position.
• Zip
  See multizip for more information.
• ZipEq
  An iterator which iterates two other iterators simultaneously and panic if they have different lengths.
• ZipLongest
  An iterator which iterates two other iterators simultaneously and wraps the elements in EitherOrBoth.

Type Aliases

• Coalesce
  An iterator adaptor that may join together adjacent elements.
• Dedup
  An iterator adaptor that removes repeated duplicates.
• DedupBy
  An iterator adaptor that removes repeated duplicates, determining equality using a comparison function.
• DedupByWithCount
  An iterator adaptor that removes repeated duplicates, while keeping a count of how many repeated elements were present. This will determine equality using a comparison function.
• DedupWithCount
  An iterator adaptor that removes repeated duplicates, while keeping a count of how many repeated elements were present.
• Duplicates
  An iterator adapter to filter out duplicate elements.
• DuplicatesBy
  An iterator adapter to filter for duplicate elements.
• GroupByDeprecated
  See ChunkBy.
• GroupingMapBy
  GroupingMapBy is an intermediate struct for efficient group-and-fold operations.
• Intersperse
  An iterator adaptor to insert a particular value between each element of the adapted iterator.
• KMerge
  An iterator adaptor that merges an abitrary number of base iterators in ascending order. If all base iterators are sorted (ascending), the result is sorted.
• MapInto
  An iterator adapter to apply Into conversion to each element.
• MapOk
  An iterator adapter to apply a transformation within a nested Result::Ok.
• Merge
  An iterator adaptor that merges the two base iterators in ascending order. If both base iterators are sorted (ascending), the result is sorted.
• MergeJoinBy
  An iterator adaptor that merge-joins items from the two base iterators in ascending order.