Rust Iterator overview

Creates an iterator with the provided closure as its next method.

Creates an iterator that yields nothing.

Creates an iterator that yields an element exactly once.

Creates an iterator that lazily generates a value exactly once by invoking the provided closure.

Creates a new iterator that endlessly repeats a single element.

Creates a new iterator that repeats a single element a given number of times.

Creates a new iterator that repeats elements endlessly by applying the provided closure.

Creates an iterator which, starting from an initial item, computes each successive item from the preceding one.

An iterator that borrows the elements

An iterator that mutably borrows the elements

Moves the array/slice/collection, returning an owned iterator over its elements.

Returns an iterator over the chars of a string slice.

Returns an iterator over the chars of a string slice, and their positions.

Returns an iterator over the bytes of a string slice.

Returns an iterator over the lines of a string, as string slices.

Returns an iterator over substrings of this string slice, separated by characters matched by a pattern.

Also see split_whitespace, split_ascii_whitespace, split_inclusive, rsplit, etc.

Returns an iterator over the disjoint matches of a pattern within the given string slice.

Also see rmatches, match_indices, rmatch_indices

An iterator visiting all keys in arbitrary order.

An iterator visiting all values in arbitrary order.

Moves the HashMap, returning an iterator over the owned keys in arbitrary order.

Moves the HashMap, returning an iterator over the owned values in arbitrary order.

An iterator visiting all values mutably in arbitrary order.

Returns the arguments that this program was started with (normally passed via the command line).

Returns the arguments that this program was started with as OsStrings (normally passed via the command line).

Returns an iterator of (variable, value) pairs of strings, for all the environment variables of the current process.

Returns an iterator of (variable, value) pairs of OsStrings, for all the environment variables of the current process.

Produces an iterator over Path and its ancestors.

Produces an iterator over the Components of the path.

Returns an iterator over the entries within a directory.

There's also a free function.

Transforms this Read instance to an Iterator over its bytes.

Returns an iterator over the lines of this BufRead.

Consumes this handle and returns an iterator over input lines.

Returns an iterator over the connections being received on this listener.

Creates an iterator which uses a closure to determine if an element should be yielded.

See also: filter_map

Creates an iterator starting at the same point, but stepping by the given amount at each iteration.

Creates an iterator that skips the first n elements.

Creates an iterator that skips elements based on a predicate.

Creates an iterator that yields the first n elements, or fewer if the underlying iterator ends sooner.

Creates an iterator that yields elements while the given predicate returns true.

Creates an iterator which ends after the first None.

Takes two iterators and creates a new iterator over both in sequence.

Repeats an iterator endlessly.

Creates an iterator which gives the current iteration count as well as the next value.

Takes a closure and creates an iterator which calls that closure on each element.

‘Zips up’ two iterators into a single iterator of pairs. There's also a free function.

See also: unzip

Creates an iterator that flattens nested structure.

See also: flat_map

Creates an iterator which copies all of its elements.

Creates an iterator which clones all of its elements.

Creates an iterator that works like map, but flattens nested structure.

See also: map

Creates an iterator that both filters and maps.

See also: filter

Creates an iterator that both yields elements based on a predicate and maps.

See also: take_while

An iterator adapter which, like fold, holds internal state, but unlike fold, produces a new iterator.

See also: fold

Does something with each element of an iterator, passing the value on.

Creates an iterator which can use the peek and peek_mut methods to look at the next element of the iterator without consuming it.

Reverses an iterator’s direction.

See also: last, rposition

Advances the iterator and returns the next value.

Consumes the iterator, returning the last element.

Returns the nth element of the iterator.

Searches for an element of an iterator that satisfies a predicate.

Applies a function to the elements of the iterator and returns the first non-none result.

See also: map

Searches for an element in an iterator, returning its index.

Searches for an element in an iterator from the right, returning its index.

See also: rev

Tests if every element of the iterator matches a predicate.

Tests if any element of the iterator matches a predicate.

Checks if the elements of this iterator are sorted.

Checks if the elements of this iterator are sorted using the given comparator function.

Checks if the elements of this iterator are sorted using the given key extraction function.

Folds every element into an accumulator by applying an operation, returning the final result.

See also: try_fold, scan

Reduces the elements to a single one, by repeatedly applying a reducing operation.

Transforms an iterator into a collection.

Consumes the iterator, counting the number of iterations and returning it.

See also: sum

Returns the maximum element of an iterator.

Returns the element that gives the maximum value with respect to the specified comparison function.

Returns the element that gives the maximum value from the specified key extraction function.

Returns the minimum element of an iterator.

Returns the element that gives the minimum value with respect to the specified comparison function.

Returns the element that gives the minimum value from the specified key extraction function.

Sums the elements of an iterator.

Iterates over the entire iterator, multiplying all the elements

An iterator method that applies a function as long as it returns successfully, producing a single, final value.

See also: fold

Converts an iterator of pairs into a pair of containers.

See also: zip

Consumes an iterator, creating two collections from it.

Lexicographically compares the elements of this Iterator with those of another.

Lexicographically compares the PartialOrd elements of this Iterator with those of another. The comparison works like short-circuit evaluation.

Determines if the elements of this Iterator are equal to those of another.

Determines if the elements of this Iterator are not equal to those of another.

Determines if the elements of this Iterator are lexicographically greater than or equal to those of another.

Determines if the elements of this Iterator are lexicographically greater than those of another.

Determines if the elements of this Iterator are lexicographically less or equal to those of another.

Determines if the elements of this Iterator are lexicographically less than those of another.

Calls a closure on each element of an iterator.

An iterator method that applies a fallible function to each item in the iterator, stopping at the first error and returning that error.

See also: for_each