Struct std::slice::IterMut 1.0.0
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pub struct IterMut<'a, T> where
T: 'a, { /* fields omitted */ }
Mutable slice iterator.
This struct is created by the iter_mut
method on slices.
Examples
Basic usage:
// First, we declare a type which has `iter_mut` method to get the `IterMut` // struct (&[usize here]): let mut slice = &mut [1, 2, 3]; // Then, we iterate over it and increment each element value: for element in slice.iter_mut() { *element += 1; } // We now have "[2, 3, 4]": println!("{:?}", slice);Run
Methods
impl<'a, T> IterMut<'a, T>
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pub fn into_slice(self) -> &'a mut [T]
1.4.0[src]
View the underlying data as a subslice of the original data.
To avoid creating &mut
references that alias, this is forced
to consume the iterator. Consider using the Slice
and
SliceMut
implementations for obtaining slices with more
restricted lifetimes that do not consume the iterator.
Examples
Basic usage:
// First, we declare a type which has `iter_mut` method to get the `IterMut` // struct (&[usize here]): let mut slice = &mut [1, 2, 3]; { // Then, we get the iterator: let mut iter = slice.iter_mut(); // We move to next element: iter.next(); // So if we print what `into_slice` method returns here, we have "[2, 3]": println!("{:?}", iter.into_slice()); } // Now let's modify a value of the slice: { // First we get back the iterator: let mut iter = slice.iter_mut(); // We change the value of the first element of the slice returned by the `next` method: *iter.next().unwrap() += 1; } // Now slice is "[2, 2, 3]": println!("{:?}", slice);Run
Trait Implementations
impl<'a, T> Debug for IterMut<'a, T> where
T: 'a + Debug,
1.9.0[src]
T: 'a + Debug,
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>
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Formats the value using the given formatter. Read more
impl<'a, T> Sync for IterMut<'a, T> where
T: Sync,
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T: Sync,
impl<'a, T> Send for IterMut<'a, T> where
T: Send,
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T: Send,
impl<'a, T> TrustedLen for IterMut<'a, T>
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impl<'a, T> DoubleEndedIterator for IterMut<'a, T>
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fn next_back(&mut self) -> Option<&'a mut T>
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Removes and returns an element from the end of the iterator. Read more
fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R where
F: FnMut(B, <IterMut<'a, T> as Iterator>::Item) -> R,
R: Try<Ok = B>,
IterMut<'a, T>: Sized,
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F: FnMut(B, <IterMut<'a, T> as Iterator>::Item) -> R,
R: Try<Ok = B>,
IterMut<'a, T>: Sized,
This is the reverse version of [try_fold()
]: it takes elements starting from the back of the iterator. Read more
fn rfold<Acc, Fold>(self, init: Acc, f: Fold) -> Acc where
Fold: FnMut(Acc, <IterMut<'a, T> as Iterator>::Item) -> Acc,
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Fold: FnMut(Acc, <IterMut<'a, T> as Iterator>::Item) -> Acc,
An iterator method that reduces the iterator's elements to a single, final value, starting from the back. Read more
fn rfind<P>(&mut self, predicate: P) -> Option<Self::Item> where
P: FnMut(&Self::Item) -> bool,
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P: FnMut(&Self::Item) -> bool,
Searches for an element of an iterator from the right that satisfies a predicate. Read more
impl<'a, T> FusedIterator for IterMut<'a, T>
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impl<'a, T> ExactSizeIterator for IterMut<'a, T>
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fn is_empty(&self) -> bool
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Returns whether the iterator is empty. Read more
fn len(&self) -> usize
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Returns the exact number of times the iterator will iterate. Read more
impl<'a, T> Iterator for IterMut<'a, T>
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type Item = &'a mut T
The type of the elements being iterated over.
fn next(&mut self) -> Option<&'a mut T>
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Advances the iterator and returns the next value. Read more
fn size_hint(&self) -> (usize, Option<usize>)
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Returns the bounds on the remaining length of the iterator. Read more
fn count(self) -> usize
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Consumes the iterator, counting the number of iterations and returning it. Read more
fn nth(&mut self, n: usize) -> Option<&'a mut T>
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Returns the n
th element of the iterator. Read more
fn last(self) -> Option<&'a mut T>
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Consumes the iterator, returning the last element. Read more
fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R where
F: FnMut(B, <IterMut<'a, T> as Iterator>::Item) -> R,
R: Try<Ok = B>,
IterMut<'a, T>: Sized,
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F: FnMut(B, <IterMut<'a, T> as Iterator>::Item) -> R,
R: Try<Ok = B>,
IterMut<'a, T>: Sized,
An iterator method that applies a function as long as it returns successfully, producing a single, final value. Read more
fn fold<Acc, Fold>(self, init: Acc, f: Fold) -> Acc where
Fold: FnMut(Acc, <IterMut<'a, T> as Iterator>::Item) -> Acc,
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Fold: FnMut(Acc, <IterMut<'a, T> as Iterator>::Item) -> Acc,
An iterator method that applies a function, producing a single, final value. Read more
fn position<P>(&mut self, predicate: P) -> Option<usize> where
P: FnMut(<IterMut<'a, T> as Iterator>::Item) -> bool,
IterMut<'a, T>: Sized,
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P: FnMut(<IterMut<'a, T> as Iterator>::Item) -> bool,
IterMut<'a, T>: Sized,
Searches for an element in an iterator, returning its index. Read more
fn rposition<P>(&mut self, predicate: P) -> Option<usize> where
P: FnMut(<IterMut<'a, T> as Iterator>::Item) -> bool,
IterMut<'a, T>: Sized,
IterMut<'a, T>: ExactSizeIterator,
IterMut<'a, T>: DoubleEndedIterator,
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P: FnMut(<IterMut<'a, T> as Iterator>::Item) -> bool,
IterMut<'a, T>: Sized,
IterMut<'a, T>: ExactSizeIterator,
IterMut<'a, T>: DoubleEndedIterator,
Searches for an element in an iterator from the right, returning its index. Read more
ⓘImportant traits for StepBy<I>fn step_by(self, step: usize) -> StepBy<Self>
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🔬 This is a nightly-only experimental API. (iterator_step_by
#27741)
unstable replacement of Range::step_by
Creates an iterator starting at the same point, but stepping by the given amount at each iteration. Read more
ⓘImportant traits for Chain<A, B>fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter> where
U: IntoIterator<Item = Self::Item>,
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U: IntoIterator<Item = Self::Item>,
Takes two iterators and creates a new iterator over both in sequence. Read more
ⓘImportant traits for Zip<A, B>fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter> where
U: IntoIterator,
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U: IntoIterator,
'Zips up' two iterators into a single iterator of pairs. Read more
ⓘImportant traits for Map<I, F>fn map<B, F>(self, f: F) -> Map<Self, F> where
F: FnMut(Self::Item) -> B,
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F: FnMut(Self::Item) -> B,
Takes a closure and creates an iterator which calls that closure on each element. Read more
fn for_each<F>(self, f: F) where
F: FnMut(Self::Item),
1.21.0[src]
F: FnMut(Self::Item),
Calls a closure on each element of an iterator. Read more
ⓘImportant traits for Filter<I, P>fn filter<P>(self, predicate: P) -> Filter<Self, P> where
P: FnMut(&Self::Item) -> bool,
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P: FnMut(&Self::Item) -> bool,
Creates an iterator which uses a closure to determine if an element should be yielded. Read more
ⓘImportant traits for FilterMap<I, F>fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F> where
F: FnMut(Self::Item) -> Option<B>,
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F: FnMut(Self::Item) -> Option<B>,
Creates an iterator that both filters and maps. Read more
ⓘImportant traits for Enumerate<I>fn enumerate(self) -> Enumerate<Self>
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Creates an iterator which gives the current iteration count as well as the next value. Read more
ⓘImportant traits for Peekable<I>fn peekable(self) -> Peekable<Self>
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Creates an iterator which can use peek
to look at the next element of the iterator without consuming it. Read more
ⓘImportant traits for SkipWhile<I, P>fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P> where
P: FnMut(&Self::Item) -> bool,
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P: FnMut(&Self::Item) -> bool,
Creates an iterator that [skip
]s elements based on a predicate. Read more
ⓘImportant traits for TakeWhile<I, P>fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P> where
P: FnMut(&Self::Item) -> bool,
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P: FnMut(&Self::Item) -> bool,
Creates an iterator that yields elements based on a predicate. Read more
ⓘImportant traits for Skip<I>fn skip(self, n: usize) -> Skip<Self>
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Creates an iterator that skips the first n
elements. Read more
ⓘImportant traits for Take<I>fn take(self, n: usize) -> Take<Self>
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Creates an iterator that yields its first n
elements. Read more
ⓘImportant traits for Scan<I, St, F>fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F> where
F: FnMut(&mut St, Self::Item) -> Option<B>,
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F: FnMut(&mut St, Self::Item) -> Option<B>,
An iterator adaptor similar to [fold
] that holds internal state and produces a new iterator. Read more
ⓘImportant traits for FlatMap<I, U, F>fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> where
F: FnMut(Self::Item) -> U,
U: IntoIterator,
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F: FnMut(Self::Item) -> U,
U: IntoIterator,
Creates an iterator that works like map, but flattens nested structure. Read more
ⓘImportant traits for Fuse<I>fn fuse(self) -> Fuse<Self>
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Creates an iterator which ends after the first [None
]. Read more
ⓘImportant traits for Inspect<I, F>fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnMut(&Self::Item),
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F: FnMut(&Self::Item),
Do something with each element of an iterator, passing the value on. Read more
ⓘImportant traits for &'a mut Ifn by_ref(&mut self) -> &mut Self
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Borrows an iterator, rather than consuming it. Read more
fn collect<B>(self) -> B where
B: FromIterator<Self::Item>,
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B: FromIterator<Self::Item>,
Transforms an iterator into a collection. Read more
fn partition<B, F>(self, f: F) -> (B, B) where
B: Default + Extend<Self::Item>,
F: FnMut(&Self::Item) -> bool,
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B: Default + Extend<Self::Item>,
F: FnMut(&Self::Item) -> bool,
Consumes an iterator, creating two collections from it. Read more
fn all<F>(&mut self, f: F) -> bool where
F: FnMut(Self::Item) -> bool,
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F: FnMut(Self::Item) -> bool,
Tests if every element of the iterator matches a predicate. Read more
fn any<F>(&mut self, f: F) -> bool where
F: FnMut(Self::Item) -> bool,
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F: FnMut(Self::Item) -> bool,
Tests if any element of the iterator matches a predicate. Read more
fn find<P>(&mut self, predicate: P) -> Option<Self::Item> where
P: FnMut(&Self::Item) -> bool,
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P: FnMut(&Self::Item) -> bool,
Searches for an element of an iterator that satisfies a predicate. Read more
fn max(self) -> Option<Self::Item> where
Self::Item: Ord,
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Self::Item: Ord,
Returns the maximum element of an iterator. Read more
fn min(self) -> Option<Self::Item> where
Self::Item: Ord,
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Self::Item: Ord,
Returns the minimum element of an iterator. Read more
fn max_by_key<B, F>(self, f: F) -> Option<Self::Item> where
B: Ord,
F: FnMut(&Self::Item) -> B,
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B: Ord,
F: FnMut(&Self::Item) -> B,
Returns the element that gives the maximum value from the specified function. Read more
fn max_by<F>(self, compare: F) -> Option<Self::Item> where
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
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F: FnMut(&Self::Item, &Self::Item) -> Ordering,
Returns the element that gives the maximum value with respect to the specified comparison function. Read more
fn min_by_key<B, F>(self, f: F) -> Option<Self::Item> where
B: Ord,
F: FnMut(&Self::Item) -> B,
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B: Ord,
F: FnMut(&Self::Item) -> B,
Returns the element that gives the minimum value from the specified function. Read more
fn min_by<F>(self, compare: F) -> Option<Self::Item> where
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
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F: FnMut(&Self::Item, &Self::Item) -> Ordering,
Returns the element that gives the minimum value with respect to the specified comparison function. Read more
ⓘImportant traits for Rev<I>fn rev(self) -> Rev<Self> where
Self: DoubleEndedIterator,
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Self: DoubleEndedIterator,
Reverses an iterator's direction. Read more
fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB) where
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
Self: Iterator<Item = (A, B)>,
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FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
Self: Iterator<Item = (A, B)>,
Converts an iterator of pairs into a pair of containers. Read more
ⓘImportant traits for Cloned<I>fn cloned<'a, T>(self) -> Cloned<Self> where
Self: Iterator<Item = &'a T>,
T: 'a + Clone,
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Self: Iterator<Item = &'a T>,
T: 'a + Clone,
Creates an iterator which [clone
]s all of its elements. Read more
ⓘImportant traits for Cycle<I>fn cycle(self) -> Cycle<Self> where
Self: Clone,
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Self: Clone,
Repeats an iterator endlessly. Read more
fn sum<S>(self) -> S where
S: Sum<Self::Item>,
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S: Sum<Self::Item>,
Sums the elements of an iterator. Read more
fn product<P>(self) -> P where
P: Product<Self::Item>,
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P: Product<Self::Item>,
Iterates over the entire iterator, multiplying all the elements Read more
fn cmp<I>(self, other: I) -> Ordering where
I: IntoIterator<Item = Self::Item>,
Self::Item: Ord,
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I: IntoIterator<Item = Self::Item>,
Self::Item: Ord,
Lexicographically compares the elements of this Iterator
with those of another. Read more
fn partial_cmp<I>(self, other: I) -> Option<Ordering> where
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
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I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
Lexicographically compares the elements of this Iterator
with those of another. Read more
fn eq<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<<I as IntoIterator>::Item>,
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I: IntoIterator,
Self::Item: PartialEq<<I as IntoIterator>::Item>,
Determines if the elements of this Iterator
are equal to those of another. Read more
fn ne<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<<I as IntoIterator>::Item>,
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I: IntoIterator,
Self::Item: PartialEq<<I as IntoIterator>::Item>,
Determines if the elements of this Iterator
are unequal to those of another. Read more
fn lt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
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I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
Determines if the elements of this Iterator
are lexicographically less than those of another. Read more
fn le<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
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I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
Determines if the elements of this Iterator
are lexicographically less or equal to those of another. Read more
fn gt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
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I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
Determines if the elements of this Iterator
are lexicographically greater than those of another. Read more
fn ge<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
1.5.0[src]
I: IntoIterator,
Self::Item: PartialOrd<<I as IntoIterator>::Item>,
Determines if the elements of this Iterator
are lexicographically greater than or equal to those of another. Read more