pub struct Update<I, F> { /* private fields */ }
Expand description
An iterator adapter to apply a mutating function to each element before yielding it.
See .update()
for more information.
Trait Implementations§
source§impl<I, F> DoubleEndedIterator for Update<I, F>
impl<I, F> DoubleEndedIterator for Update<I, F>
source§fn next_back(&mut self) -> Option<Self::Item>
fn next_back(&mut self) -> Option<Self::Item>
Removes and returns an element from the end of the iterator. Read more
source§fn advance_back_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
fn advance_back_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
🔬This is a nightly-only experimental API. (
iter_advance_by
)Advances the iterator from the back by
n
elements. Read more1.37.0 · source§fn nth_back(&mut self, n: usize) -> Option<Self::Item>
fn nth_back(&mut self, n: usize) -> Option<Self::Item>
Returns the
n
th element from the end of the iterator. Read more1.27.0 · source§fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R
fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R
This is the reverse version of
Iterator::try_fold()
: it takes
elements starting from the back of the iterator. Read moresource§impl<I, F> ExactSizeIterator for Update<I, F>
impl<I, F> ExactSizeIterator for Update<I, F>
source§impl<I, F> Iterator for Update<I, F>
impl<I, F> Iterator for Update<I, F>
source§fn next(&mut self) -> Option<Self::Item>
fn next(&mut self) -> Option<Self::Item>
Advances the iterator and returns the next value. Read more
source§fn size_hint(&self) -> (usize, Option<usize>)
fn size_hint(&self) -> (usize, Option<usize>)
Returns the bounds on the remaining length of the iterator. Read more
source§fn fold<Acc, G>(self, init: Acc, g: G) -> Acc
fn fold<Acc, G>(self, init: Acc, g: G) -> Acc
Folds every element into an accumulator by applying an operation,
returning the final result. Read more
source§fn collect<C>(self) -> Cwhere
C: FromIterator<Self::Item>,
fn collect<C>(self) -> Cwhere
C: FromIterator<Self::Item>,
Transforms an iterator into a collection. Read more
source§fn next_chunk<const N: usize>(
&mut self,
) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>where
Self: Sized,
fn next_chunk<const N: usize>(
&mut self,
) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>where
Self: Sized,
🔬This is a nightly-only experimental API. (
iter_next_chunk
)Advances the iterator and returns an array containing the next
N
values. Read more1.0.0 · source§fn count(self) -> usizewhere
Self: Sized,
fn count(self) -> usizewhere
Self: Sized,
Consumes the iterator, counting the number of iterations and returning it. Read more
1.0.0 · source§fn last(self) -> Option<Self::Item>where
Self: Sized,
fn last(self) -> Option<Self::Item>where
Self: Sized,
Consumes the iterator, returning the last element. Read more
source§fn advance_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
fn advance_by(&mut self, n: usize) -> Result<(), NonZero<usize>>
🔬This is a nightly-only experimental API. (
iter_advance_by
)Advances the iterator by
n
elements. Read more1.0.0 · source§fn nth(&mut self, n: usize) -> Option<Self::Item>
fn nth(&mut self, n: usize) -> Option<Self::Item>
Returns the
n
th element of the iterator. Read more1.28.0 · source§fn step_by(self, step: usize) -> StepBy<Self>where
Self: Sized,
fn step_by(self, step: usize) -> StepBy<Self>where
Self: Sized,
Creates an iterator starting at the same point, but stepping by
the given amount at each iteration. Read more
1.0.0 · source§fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter>
fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter>
Takes two iterators and creates a new iterator over both in sequence. Read more
1.0.0 · source§fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter>where
Self: Sized,
U: IntoIterator,
fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter>where
Self: Sized,
U: IntoIterator,
‘Zips up’ two iterators into a single iterator of pairs. Read more
source§fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G>
fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G>
🔬This is a nightly-only experimental API. (
iter_intersperse
)Creates a new iterator which places an item generated by
separator
between adjacent items of the original iterator. Read more1.0.0 · source§fn map<B, F>(self, f: F) -> Map<Self, F>
fn map<B, F>(self, f: F) -> Map<Self, F>
Takes a closure and creates an iterator which calls that closure on each
element. Read more
1.0.0 · source§fn filter<P>(self, predicate: P) -> Filter<Self, P>
fn filter<P>(self, predicate: P) -> Filter<Self, P>
Creates an iterator which uses a closure to determine if an element
should be yielded. Read more
1.0.0 · source§fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F>
fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F>
Creates an iterator that both filters and maps. Read more
1.0.0 · source§fn enumerate(self) -> Enumerate<Self>where
Self: Sized,
fn enumerate(self) -> Enumerate<Self>where
Self: Sized,
Creates an iterator which gives the current iteration count as well as
the next value. Read more
1.0.0 · source§fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P>
fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P>
1.0.0 · source§fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P>
fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P>
Creates an iterator that yields elements based on a predicate. Read more
1.57.0 · source§fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>
fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>
Creates an iterator that both yields elements based on a predicate and maps. Read more
1.0.0 · source§fn skip(self, n: usize) -> Skip<Self>where
Self: Sized,
fn skip(self, n: usize) -> Skip<Self>where
Self: Sized,
Creates an iterator that skips the first
n
elements. Read more1.0.0 · source§fn take(self, n: usize) -> Take<Self>where
Self: Sized,
fn take(self, n: usize) -> Take<Self>where
Self: Sized,
Creates an iterator that yields the first
n
elements, or fewer
if the underlying iterator ends sooner. Read more1.0.0 · source§fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>
fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>
Creates an iterator that works like map, but flattens nested structure. Read more
source§fn map_windows<F, R, const N: usize>(self, f: F) -> MapWindows<Self, F, N>
fn map_windows<F, R, const N: usize>(self, f: F) -> MapWindows<Self, F, N>
🔬This is a nightly-only experimental API. (
iter_map_windows
)Calls the given function
f
for each contiguous window of size N
over
self
and returns an iterator over the outputs of f
. Like slice::windows()
,
the windows during mapping overlap as well. Read more1.0.0 · source§fn inspect<F>(self, f: F) -> Inspect<Self, F>
fn inspect<F>(self, f: F) -> Inspect<Self, F>
Does something with each element of an iterator, passing the value on. Read more
1.0.0 · source§fn by_ref(&mut self) -> &mut Selfwhere
Self: Sized,
fn by_ref(&mut self) -> &mut Selfwhere
Self: Sized,
Borrows an iterator, rather than consuming it. Read more
source§fn collect_into<E>(self, collection: &mut E) -> &mut E
fn collect_into<E>(self, collection: &mut E) -> &mut E
🔬This is a nightly-only experimental API. (
iter_collect_into
)Collects all the items from an iterator into a collection. Read more
1.0.0 · source§fn partition<B, F>(self, f: F) -> (B, B)
fn partition<B, F>(self, f: F) -> (B, B)
Consumes an iterator, creating two collections from it. Read more
source§fn is_partitioned<P>(self, predicate: P) -> bool
fn is_partitioned<P>(self, predicate: P) -> bool
🔬This is a nightly-only experimental API. (
iter_is_partitioned
)Checks if the elements of this iterator are partitioned according to the given predicate,
such that all those that return
true
precede all those that return false
. Read more1.27.0 · source§fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R
fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R
An iterator method that applies a function as long as it returns
successfully, producing a single, final value. Read more
1.27.0 · source§fn try_for_each<F, R>(&mut self, f: F) -> R
fn try_for_each<F, R>(&mut self, f: F) -> R
An iterator method that applies a fallible function to each item in the
iterator, stopping at the first error and returning that error. Read more
1.51.0 · source§fn reduce<F>(self, f: F) -> Option<Self::Item>
fn reduce<F>(self, f: F) -> Option<Self::Item>
Reduces the elements to a single one, by repeatedly applying a reducing
operation. Read more
source§fn try_reduce<R>(
&mut self,
f: impl FnMut(Self::Item, Self::Item) -> R,
) -> <<R as Try>::Residual as Residual<Option<<R as Try>::Output>>>::TryType
fn try_reduce<R>( &mut self, f: impl FnMut(Self::Item, Self::Item) -> R, ) -> <<R as Try>::Residual as Residual<Option<<R as Try>::Output>>>::TryType
🔬This is a nightly-only experimental API. (
iterator_try_reduce
)Reduces the elements to a single one by repeatedly applying a reducing operation. If the
closure returns a failure, the failure is propagated back to the caller immediately. Read more
1.0.0 · source§fn all<F>(&mut self, f: F) -> bool
fn all<F>(&mut self, f: F) -> bool
Tests if every element of the iterator matches a predicate. Read more
1.0.0 · source§fn any<F>(&mut self, f: F) -> bool
fn any<F>(&mut self, f: F) -> bool
Tests if any element of the iterator matches a predicate. Read more
1.0.0 · source§fn find<P>(&mut self, predicate: P) -> Option<Self::Item>
fn find<P>(&mut self, predicate: P) -> Option<Self::Item>
Searches for an element of an iterator that satisfies a predicate. Read more
1.30.0 · source§fn find_map<B, F>(&mut self, f: F) -> Option<B>
fn find_map<B, F>(&mut self, f: F) -> Option<B>
Applies function to the elements of iterator and returns
the first non-none result. Read more
source§fn try_find<R>(
&mut self,
f: impl FnMut(&Self::Item) -> R,
) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType
fn try_find<R>( &mut self, f: impl FnMut(&Self::Item) -> R, ) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType
🔬This is a nightly-only experimental API. (
try_find
)Applies function to the elements of iterator and returns
the first true result or the first error. Read more
1.0.0 · source§fn position<P>(&mut self, predicate: P) -> Option<usize>
fn position<P>(&mut self, predicate: P) -> Option<usize>
Searches for an element in an iterator, returning its index. Read more
1.6.0 · source§fn max_by_key<B, F>(self, f: F) -> Option<Self::Item>
fn max_by_key<B, F>(self, f: F) -> Option<Self::Item>
Returns the element that gives the maximum value from the
specified function. Read more
1.15.0 · source§fn max_by<F>(self, compare: F) -> Option<Self::Item>
fn max_by<F>(self, compare: F) -> Option<Self::Item>
Returns the element that gives the maximum value with respect to the
specified comparison function. Read more
1.6.0 · source§fn min_by_key<B, F>(self, f: F) -> Option<Self::Item>
fn min_by_key<B, F>(self, f: F) -> Option<Self::Item>
Returns the element that gives the minimum value from the
specified function. Read more
1.15.0 · source§fn min_by<F>(self, compare: F) -> Option<Self::Item>
fn min_by<F>(self, compare: F) -> Option<Self::Item>
Returns the element that gives the minimum value with respect to the
specified comparison function. Read more
1.0.0 · source§fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)
fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB)
Converts an iterator of pairs into a pair of containers. Read more
1.36.0 · source§fn copied<'a, T>(self) -> Copied<Self>
fn copied<'a, T>(self) -> Copied<Self>
Creates an iterator which copies all of its elements. Read more
source§fn array_chunks<const N: usize>(self) -> ArrayChunks<Self, N>where
Self: Sized,
fn array_chunks<const N: usize>(self) -> ArrayChunks<Self, N>where
Self: Sized,
🔬This is a nightly-only experimental API. (
iter_array_chunks
)Returns an iterator over
N
elements of the iterator at a time. Read more1.11.0 · source§fn product<P>(self) -> P
fn product<P>(self) -> P
Iterates over the entire iterator, multiplying all the elements Read more
source§fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering
🔬This is a nightly-only experimental API. (
iter_order_by
)Lexicographically compares the elements of this
Iterator
with those
of another with respect to the specified comparison function. Read more1.5.0 · source§fn partial_cmp<I>(self, other: I) -> Option<Ordering>
fn partial_cmp<I>(self, other: I) -> Option<Ordering>
Lexicographically compares the
PartialOrd
elements of
this Iterator
with those of another. The comparison works like short-circuit
evaluation, returning a result without comparing the remaining elements.
As soon as an order can be determined, the evaluation stops and a result is returned. Read moresource§fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering>where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering>where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
🔬This is a nightly-only experimental API. (
iter_order_by
)Lexicographically compares the elements of this
Iterator
with those
of another with respect to the specified comparison function. Read moresource§fn eq_by<I, F>(self, other: I, eq: F) -> bool
fn eq_by<I, F>(self, other: I, eq: F) -> bool
🔬This is a nightly-only experimental API. (
iter_order_by
)1.5.0 · source§fn lt<I>(self, other: I) -> bool
fn lt<I>(self, other: I) -> bool
Determines if the elements of this
Iterator
are lexicographically
less than those of another. Read more1.5.0 · source§fn le<I>(self, other: I) -> bool
fn le<I>(self, other: I) -> bool
Determines if the elements of this
Iterator
are lexicographically
less or equal to those of another. Read more1.5.0 · source§fn gt<I>(self, other: I) -> bool
fn gt<I>(self, other: I) -> bool
Determines if the elements of this
Iterator
are lexicographically
greater than those of another. Read more1.5.0 · source§fn ge<I>(self, other: I) -> bool
fn ge<I>(self, other: I) -> bool
Determines if the elements of this
Iterator
are lexicographically
greater than or equal to those of another. Read moresource§fn is_sorted_by<F>(self, compare: F) -> bool
fn is_sorted_by<F>(self, compare: F) -> bool
🔬This is a nightly-only experimental API. (
is_sorted
)Checks if the elements of this iterator are sorted using the given comparator function. Read more
source§fn is_sorted_by_key<F, K>(self, f: F) -> bool
fn is_sorted_by_key<F, K>(self, f: F) -> bool
🔬This is a nightly-only experimental API. (
is_sorted
)Checks if the elements of this iterator are sorted using the given key extraction
function. Read more
Auto Trait Implementations§
impl<I, F> Freeze for Update<I, F>
impl<I, F> RefUnwindSafe for Update<I, F>where
I: RefUnwindSafe,
F: RefUnwindSafe,
impl<I, F> Send for Update<I, F>
impl<I, F> Sync for Update<I, F>
impl<I, F> Unpin for Update<I, F>
impl<I, F> UnwindSafe for Update<I, F>where
I: UnwindSafe,
F: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<I> IntoIterator for Iwhere
I: Iterator,
impl<I> IntoIterator for Iwhere
I: Iterator,
source§impl<T> Itertools for T
impl<T> Itertools for T
source§fn interleave<J>(self, other: J) -> Interleave<Self, J::IntoIter> ⓘ
fn interleave<J>(self, other: J) -> Interleave<Self, J::IntoIter> ⓘ
Alternate elements from two iterators until both have run out. Read more
source§fn interleave_shortest<J>(
self,
other: J,
) -> InterleaveShortest<Self, J::IntoIter> ⓘ
fn interleave_shortest<J>( self, other: J, ) -> InterleaveShortest<Self, J::IntoIter> ⓘ
Alternate elements from two iterators until at least one of them has run
out. Read more
source§fn intersperse(self, element: Self::Item) -> Intersperse<Self> ⓘ
fn intersperse(self, element: Self::Item) -> Intersperse<Self> ⓘ
An iterator adaptor to insert a particular value
between each element of the adapted iterator. Read more
source§fn zip_longest<J>(self, other: J) -> ZipLongest<Self, J::IntoIter> ⓘwhere
J: IntoIterator,
Self: Sized,
fn zip_longest<J>(self, other: J) -> ZipLongest<Self, J::IntoIter> ⓘwhere
J: IntoIterator,
Self: Sized,
Create an iterator which iterates over both this and the specified
iterator simultaneously, yielding pairs of two optional elements. Read more
source§fn zip_eq<J>(self, other: J) -> ZipEq<Self, J::IntoIter> ⓘwhere
J: IntoIterator,
Self: Sized,
fn zip_eq<J>(self, other: J) -> ZipEq<Self, J::IntoIter> ⓘwhere
J: IntoIterator,
Self: Sized,
Create an iterator which iterates over both this and the specified
iterator simultaneously, yielding pairs of elements. Read more
source§fn batching<B, F>(self, f: F) -> Batching<Self, F> ⓘ
fn batching<B, F>(self, f: F) -> Batching<Self, F> ⓘ
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. Read more
source§fn group_by<K, F>(self, key: F) -> GroupBy<K, Self, F>
fn group_by<K, F>(self, key: F) -> GroupBy<K, Self, F>
Return an iterable that can group iterator elements.
Consecutive elements that map to the same key (“runs”), are assigned
to the same group. Read more
source§fn chunks(self, size: usize) -> IntoChunks<Self>where
Self: Sized,
fn chunks(self, size: usize) -> IntoChunks<Self>where
Self: Sized,
Return an iterable that can chunk the iterator. Read more
source§fn tuple_windows<T>(self) -> TupleWindows<Self, T> ⓘ
fn tuple_windows<T>(self) -> TupleWindows<Self, T> ⓘ
Return an iterator over all contiguous windows producing tuples of
a specific size (up to 4). Read more
source§fn tuples<T>(self) -> Tuples<Self, T> ⓘ
fn tuples<T>(self) -> Tuples<Self, T> ⓘ
Return an iterator that groups the items in tuples of a specific size
(up to 4). Read more
source§fn tee(self) -> (Tee<Self>, Tee<Self>)
fn tee(self) -> (Tee<Self>, Tee<Self>)
Split into an iterator pair that both yield all elements from
the original iterator. Read more
source§fn step(self, n: usize) -> Step<Self> ⓘwhere
Self: Sized,
fn step(self, n: usize) -> Step<Self> ⓘwhere
Self: Sized,
👎Deprecated since 0.8: Use std .step_by() instead
Return an iterator adaptor that steps
n
elements in the base iterator
for each iteration. Read moresource§fn map_into<R>(self) -> MapInto<Self, R> ⓘ
fn map_into<R>(self) -> MapInto<Self, R> ⓘ
Convert each item of the iterator using the
Into
trait. Read moresource§fn map_results<F, T, U, E>(self, f: F) -> MapResults<Self, F> ⓘ
fn map_results<F, T, U, E>(self, f: F) -> MapResults<Self, F> ⓘ
Return an iterator adaptor that applies the provided closure
to every
Result::Ok
value. Result::Err
values are
unchanged. Read moresource§fn merge<J>(self, other: J) -> Merge<Self, J::IntoIter> ⓘ
fn merge<J>(self, other: J) -> Merge<Self, J::IntoIter> ⓘ
Return an iterator adaptor that merges the two base iterators in
ascending order. If both base iterators are sorted (ascending), the
result is sorted. Read more
source§fn merge_by<J, F>(self, other: J, is_first: F) -> MergeBy<Self, J::IntoIter, F> ⓘ
fn merge_by<J, F>(self, other: J, is_first: F) -> MergeBy<Self, J::IntoIter, F> ⓘ
Return an iterator adaptor that merges the two base iterators in order.
This is much like
.merge()
but allows for a custom ordering. Read moresource§fn merge_join_by<J, F>(
self,
other: J,
cmp_fn: F,
) -> MergeJoinBy<Self, J::IntoIter, F> ⓘ
fn merge_join_by<J, F>( self, other: J, cmp_fn: F, ) -> MergeJoinBy<Self, J::IntoIter, F> ⓘ
Create an iterator that merges items from both this and the specified
iterator in ascending order. Read more
source§fn kmerge(self) -> KMerge<<Self::Item as IntoIterator>::IntoIter> ⓘ
fn kmerge(self) -> KMerge<<Self::Item as IntoIterator>::IntoIter> ⓘ
Return an iterator adaptor that flattens an iterator of iterators by
merging them in ascending order. Read more
source§fn kmerge_by<F>(
self,
first: F,
) -> KMergeBy<<Self::Item as IntoIterator>::IntoIter, F> ⓘwhere
Self: Sized,
Self::Item: IntoIterator,
F: FnMut(&<Self::Item as IntoIterator>::Item, &<Self::Item as IntoIterator>::Item) -> bool,
fn kmerge_by<F>(
self,
first: F,
) -> KMergeBy<<Self::Item as IntoIterator>::IntoIter, F> ⓘwhere
Self: Sized,
Self::Item: IntoIterator,
F: FnMut(&<Self::Item as IntoIterator>::Item, &<Self::Item as IntoIterator>::Item) -> bool,
Return an iterator adaptor that flattens an iterator of iterators by
merging them according to the given closure. Read more
source§fn cartesian_product<J>(self, other: J) -> Product<Self, J::IntoIter> ⓘ
fn cartesian_product<J>(self, other: J) -> Product<Self, J::IntoIter> ⓘ
Return an iterator adaptor that iterates over the cartesian product of
the element sets of two iterators
self
and J
. Read moresource§fn multi_cartesian_product(
self,
) -> MultiProduct<<Self::Item as IntoIterator>::IntoIter> ⓘwhere
Self: Iterator + Sized,
Self::Item: IntoIterator,
<Self::Item as IntoIterator>::IntoIter: Clone,
<Self::Item as IntoIterator>::Item: Clone,
fn multi_cartesian_product(
self,
) -> MultiProduct<<Self::Item as IntoIterator>::IntoIter> ⓘwhere
Self: Iterator + Sized,
Self::Item: IntoIterator,
<Self::Item as IntoIterator>::IntoIter: Clone,
<Self::Item as IntoIterator>::Item: Clone,
Return an iterator adaptor that iterates over the cartesian product of
all subiterators returned by meta-iterator
self
. Read moresource§fn coalesce<F>(self, f: F) -> Coalesce<Self, F> ⓘ
fn coalesce<F>(self, f: F) -> Coalesce<Self, F> ⓘ
Return an iterator adaptor that uses the passed-in closure to
optionally merge together consecutive elements. Read more
source§fn dedup(self) -> Dedup<Self> ⓘ
fn dedup(self) -> Dedup<Self> ⓘ
Remove duplicates from sections of consecutive identical elements.
If the iterator is sorted, all elements will be unique. Read more
source§fn unique(self) -> Unique<Self> ⓘ
fn unique(self) -> Unique<Self> ⓘ
Return an iterator adaptor that filters out elements that have
already been produced once during the iteration. Duplicates
are detected using hash and equality. Read more
source§fn unique_by<V, F>(self, f: F) -> UniqueBy<Self, V, F> ⓘ
fn unique_by<V, F>(self, f: F) -> UniqueBy<Self, V, F> ⓘ
Return an iterator adaptor that filters out elements that have
already been produced once during the iteration. Read more
source§fn peeking_take_while<F>(&mut self, accept: F) -> PeekingTakeWhile<'_, Self, F> ⓘ
fn peeking_take_while<F>(&mut self, accept: F) -> PeekingTakeWhile<'_, Self, F> ⓘ
Return an iterator adaptor that borrows from this iterator and
takes items while the closure
accept
returns true
. Read moresource§fn take_while_ref<F>(&mut self, accept: F) -> TakeWhileRef<'_, Self, F> ⓘ
fn take_while_ref<F>(&mut self, accept: F) -> TakeWhileRef<'_, Self, F> ⓘ
Return an iterator adaptor that borrows from a
Clone
-able iterator
to only pick off elements while the predicate accept
returns true
. Read moresource§fn while_some<A>(self) -> WhileSome<Self> ⓘ
fn while_some<A>(self) -> WhileSome<Self> ⓘ
Return an iterator adaptor that filters
Option<A>
iterator elements
and produces A
. Stops on the first None
encountered. Read moresource§fn tuple_combinations<T>(self) -> TupleCombinations<Self, T> ⓘ
fn tuple_combinations<T>(self) -> TupleCombinations<Self, T> ⓘ
Return an iterator adaptor that iterates over the combinations of the
elements from an iterator. Read more
source§fn combinations(self, n: usize) -> Combinations<Self> ⓘ
fn combinations(self, n: usize) -> Combinations<Self> ⓘ
Return an iterator adaptor that iterates over the
n
-length combinations of
the elements from an iterator. Read moresource§fn pad_using<F>(self, min: usize, f: F) -> PadUsing<Self, F> ⓘ
fn pad_using<F>(self, min: usize, f: F) -> PadUsing<Self, F> ⓘ
Return an iterator adaptor that pads the sequence to a minimum length of
min
by filling missing elements using a closure f
. Read moresource§fn with_position(self) -> WithPosition<Self> ⓘwhere
Self: Sized,
fn with_position(self) -> WithPosition<Self> ⓘwhere
Self: Sized,
Return an iterator adaptor that wraps each element in a
Position
to
ease special-case handling of the first or last elements. Read moresource§fn positions<P>(self, predicate: P) -> Positions<Self, P> ⓘ
fn positions<P>(self, predicate: P) -> Positions<Self, P> ⓘ
Return an iterator adaptor that yields the indices of all elements
satisfying a predicate, counted from the start of the iterator. Read more
source§fn update<F>(self, updater: F) -> Update<Self, F> ⓘ
fn update<F>(self, updater: F) -> Update<Self, F> ⓘ
Return an iterator adaptor that applies a mutating function
to each element before yielding it. Read more
source§fn next_tuple<T>(&mut self) -> Option<T>
fn next_tuple<T>(&mut self) -> Option<T>
Advances the iterator and returns the next items grouped in a tuple of
a specific size (up to 4). Read more
source§fn collect_tuple<T>(self) -> Option<T>
fn collect_tuple<T>(self) -> Option<T>
Collects all items from the iterator into a tuple of a specific size
(up to 4). Read more
source§fn find_position<P>(&mut self, pred: P) -> Option<(usize, Self::Item)>
fn find_position<P>(&mut self, pred: P) -> Option<(usize, Self::Item)>
Find the position and value of the first element satisfying a predicate. Read more
source§fn dropping(self, n: usize) -> Selfwhere
Self: Sized,
fn dropping(self, n: usize) -> Selfwhere
Self: Sized,
Consume the first
n
elements from the iterator eagerly,
and return the same iterator again. Read moresource§fn dropping_back(self, n: usize) -> Selfwhere
Self: Sized + DoubleEndedIterator,
fn dropping_back(self, n: usize) -> Selfwhere
Self: Sized + DoubleEndedIterator,
Consume the last
n
elements from the iterator eagerly,
and return the same iterator again. Read moresource§fn foreach<F>(self, f: F)
fn foreach<F>(self, f: F)
👎Deprecated since 0.8: Use .for_each() instead
Run the closure
f
eagerly on each element of the iterator. Read moresource§fn concat(self) -> Self::Itemwhere
Self: Sized,
Self::Item: Extend<<<Self as Iterator>::Item as IntoIterator>::Item> + IntoIterator + Default,
fn concat(self) -> Self::Itemwhere
Self: Sized,
Self::Item: Extend<<<Self as Iterator>::Item as IntoIterator>::Item> + IntoIterator + Default,
Combine all an iterator’s elements into one element by using
Extend
. Read moresource§fn collect_vec(self) -> Vec<Self::Item>where
Self: Sized,
fn collect_vec(self) -> Vec<Self::Item>where
Self: Sized,
.collect_vec()
is simply a type specialization of .collect()
,
for convenience.source§fn set_from<'a, A: 'a, J>(&mut self, from: J) -> usize
fn set_from<'a, A: 'a, J>(&mut self, from: J) -> usize
Assign to each reference in
self
from the from
iterator,
stopping at the shortest of the two iterators. Read moresource§fn join(&mut self, sep: &str) -> String
fn join(&mut self, sep: &str) -> String
Combine all iterator elements into one String, seperated by
sep
. Read moresource§fn format(self, sep: &str) -> Format<'_, Self>where
Self: Sized,
fn format(self, sep: &str) -> Format<'_, Self>where
Self: Sized,
Format all iterator elements, separated by
sep
. Read moresource§fn format_with<F>(self, sep: &str, format: F) -> FormatWith<'_, Self, F>
fn format_with<F>(self, sep: &str, format: F) -> FormatWith<'_, Self, F>
Format all iterator elements, separated by
sep
. Read moresource§fn fold_results<A, E, B, F>(&mut self, start: B, f: F) -> Result<B, E>
fn fold_results<A, E, B, F>(&mut self, start: B, f: F) -> Result<B, E>
Fold
Result
values from an iterator. Read moresource§fn fold_options<A, B, F>(&mut self, start: B, f: F) -> Option<B>
fn fold_options<A, B, F>(&mut self, start: B, f: F) -> Option<B>
Fold
Option
values from an iterator. Read moresource§fn fold1<F>(self, f: F) -> Option<Self::Item>
fn fold1<F>(self, f: F) -> Option<Self::Item>
Accumulator of the elements in the iterator. Read more
source§fn tree_fold1<F>(self, f: F) -> Option<Self::Item>
fn tree_fold1<F>(self, f: F) -> Option<Self::Item>
Accumulate the elements in the iterator in a tree-like manner. Read more
source§fn fold_while<B, F>(&mut self, init: B, f: F) -> FoldWhile<B>
fn fold_while<B, F>(&mut self, init: B, f: F) -> FoldWhile<B>
👎Deprecated since 0.8: Use .try_fold() instead
An iterator method that applies a function, producing a single, final value. Read more
source§fn sorted(self) -> IntoIter<Self::Item> ⓘ
fn sorted(self) -> IntoIter<Self::Item> ⓘ
Sort all iterator elements into a new iterator in ascending order. Read more
source§fn sorted_by<F>(self, cmp: F) -> IntoIter<Self::Item> ⓘ
fn sorted_by<F>(self, cmp: F) -> IntoIter<Self::Item> ⓘ
Sort all iterator elements into a new iterator in ascending order. Read more
source§fn sorted_by_key<K, F>(self, f: F) -> IntoIter<Self::Item> ⓘ
fn sorted_by_key<K, F>(self, f: F) -> IntoIter<Self::Item> ⓘ
Sort all iterator elements into a new iterator in ascending order. Read more
source§fn partition_map<A, B, F, L, R>(self, predicate: F) -> (A, B)
fn partition_map<A, B, F, L, R>(self, predicate: F) -> (A, B)
Collect all iterator elements into one of two
partitions. Unlike
Iterator::partition
, each partition may
have a distinct type. Read moresource§fn into_group_map<K, V>(self) -> HashMap<K, Vec<V>>
fn into_group_map<K, V>(self) -> HashMap<K, Vec<V>>
Return a
HashMap
of keys mapped to Vec
s of values. Keys and values
are taken from (Key, Value)
tuple pairs yielded by the input iterator. Read moresource§fn minmax(self) -> MinMaxResult<Self::Item>
fn minmax(self) -> MinMaxResult<Self::Item>
Return the minimum and maximum elements in the iterator. Read more
source§fn minmax_by_key<K, F>(self, key: F) -> MinMaxResult<Self::Item>
fn minmax_by_key<K, F>(self, key: F) -> MinMaxResult<Self::Item>
Return the minimum and maximum element of an iterator, as determined by
the specified function. Read more