pub struct Range<Idx> {
pub start: Idx,
pub end: Idx,
}
Expand description
A (half-open) range bounded inclusively below and exclusively above
(start..end
).
The range start..end
contains all values with start <= x < end
.
It is empty if start >= end
.
Examples
The start..end
syntax is a Range
:
assert_eq!((3..5), std::ops::Range { start: 3, end: 5 });
assert_eq!(3 + 4 + 5, (3..6).sum());
Runlet arr = [0, 1, 2, 3, 4];
assert_eq!(arr[ .. ], [0, 1, 2, 3, 4]);
assert_eq!(arr[ .. 3], [0, 1, 2 ]);
assert_eq!(arr[ ..=3], [0, 1, 2, 3 ]);
assert_eq!(arr[1.. ], [ 1, 2, 3, 4]);
assert_eq!(arr[1.. 3], [ 1, 2 ]); // This is a `Range`
assert_eq!(arr[1..=3], [ 1, 2, 3 ]);
RunFields
start: Idx
The lower bound of the range (inclusive).
end: Idx
The upper bound of the range (exclusive).
Implementations
sourceimpl<Idx: PartialOrd<Idx>> Range<Idx>
impl<Idx: PartialOrd<Idx>> Range<Idx>
1.35.0 · sourcepub fn contains<U>(&self, item: &U) -> bool where
Idx: PartialOrd<U>,
U: ?Sized + PartialOrd<Idx>,
pub fn contains<U>(&self, item: &U) -> bool where
Idx: PartialOrd<U>,
U: ?Sized + PartialOrd<Idx>,
Returns true
if item
is contained in the range.
Examples
assert!(!(3..5).contains(&2));
assert!( (3..5).contains(&3));
assert!( (3..5).contains(&4));
assert!(!(3..5).contains(&5));
assert!(!(3..3).contains(&3));
assert!(!(3..2).contains(&3));
assert!( (0.0..1.0).contains(&0.5));
assert!(!(0.0..1.0).contains(&f32::NAN));
assert!(!(0.0..f32::NAN).contains(&0.5));
assert!(!(f32::NAN..1.0).contains(&0.5));
Run1.47.0 · sourcepub fn is_empty(&self) -> bool
pub fn is_empty(&self) -> bool
Returns true
if the range contains no items.
Examples
assert!(!(3..5).is_empty());
assert!( (3..3).is_empty());
assert!( (3..2).is_empty());
RunThe range is empty if either side is incomparable:
assert!(!(3.0..5.0).is_empty());
assert!( (3.0..f32::NAN).is_empty());
assert!( (f32::NAN..5.0).is_empty());
RunTrait Implementations
sourceimpl<A: Step> DoubleEndedIterator for Range<A>
impl<A: Step> DoubleEndedIterator for Range<A>
sourcefn next_back(&mut self) -> Option<A>
fn next_back(&mut self) -> Option<A>
Removes and returns an element from the end of the iterator. Read more
sourcefn nth_back(&mut self, n: usize) -> Option<A>
fn nth_back(&mut self, n: usize) -> Option<A>
Returns the n
th element from the end of the iterator. Read more
sourcefn advance_back_by(&mut self, n: usize) -> Result<(), usize>
fn advance_back_by(&mut self, n: usize) -> Result<(), usize>
Advances the iterator from the back by n
elements. Read more
1.27.0 · sourcefn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R where
Self: Sized,
F: FnMut(B, Self::Item) -> R,
R: Try<Output = B>,
fn try_rfold<B, F, R>(&mut self, init: B, f: F) -> R where
Self: Sized,
F: FnMut(B, Self::Item) -> R,
R: Try<Output = B>,
This is the reverse version of Iterator::try_fold()
: it takes
elements starting from the back of the iterator. Read more
sourceimpl ExactSizeIterator for Range<usize>
impl ExactSizeIterator for Range<usize>
sourceimpl ExactSizeIterator for Range<u8>
impl ExactSizeIterator for Range<u8>
sourceimpl ExactSizeIterator for Range<u16>
impl ExactSizeIterator for Range<u16>
sourceimpl ExactSizeIterator for Range<isize>
impl ExactSizeIterator for Range<isize>
sourceimpl ExactSizeIterator for Range<i8>
impl ExactSizeIterator for Range<i8>
sourceimpl ExactSizeIterator for Range<i16>
impl ExactSizeIterator for Range<i16>
sourceimpl ExactSizeIterator for Range<u32>
impl ExactSizeIterator for Range<u32>
sourceimpl ExactSizeIterator for Range<i32>
impl ExactSizeIterator for Range<i32>
sourceimpl<A: Step> Iterator for Range<A>
impl<A: Step> Iterator for Range<A>
type Item = A
type Item = A
The type of the elements being iterated over.
sourcefn 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
sourcefn advance_by(&mut self, n: usize) -> Result<(), usize>
fn advance_by(&mut self, n: usize) -> Result<(), usize>
Advances the iterator by n
elements. Read more
sourcefn count(self) -> usize where
Self: Sized,
fn count(self) -> usize where
Self: Sized,
Consumes the iterator, counting the number of iterations and returning it. Read more
1.28.0 · sourcefn step_by(self, step: usize) -> StepBy<Self>ⓘNotable traits for StepBy<I>impl<I> Iterator for StepBy<I> where
I: Iterator, type Item = I::Item;
where
Self: Sized,
fn step_by(self, step: usize) -> StepBy<Self>ⓘNotable traits for StepBy<I>impl<I> Iterator for StepBy<I> where
I: Iterator, type Item = I::Item;
where
Self: Sized,
I: Iterator, type Item = I::Item;
Creates an iterator starting at the same point, but stepping by the given amount at each iteration. Read more
sourcefn chain<U>(self, other: U) -> Chain<Self, U::IntoIter>ⓘNotable traits for Chain<A, B>impl<A, B> Iterator for Chain<A, B> where
A: Iterator,
B: Iterator<Item = A::Item>, type Item = A::Item;
where
Self: Sized,
U: IntoIterator<Item = Self::Item>,
fn chain<U>(self, other: U) -> Chain<Self, U::IntoIter>ⓘNotable traits for Chain<A, B>impl<A, B> Iterator for Chain<A, B> where
A: Iterator,
B: Iterator<Item = A::Item>, type Item = A::Item;
where
Self: Sized,
U: IntoIterator<Item = Self::Item>,
A: Iterator,
B: Iterator<Item = A::Item>, type Item = A::Item;
Takes two iterators and creates a new iterator over both in sequence. Read more
sourcefn zip<U>(self, other: U) -> Zip<Self, U::IntoIter>ⓘNotable traits for Zip<A, B>impl<A, B> Iterator for Zip<A, B> where
A: Iterator,
B: Iterator, type Item = (A::Item, B::Item);
where
Self: Sized,
U: IntoIterator,
fn zip<U>(self, other: U) -> Zip<Self, U::IntoIter>ⓘNotable traits for Zip<A, B>impl<A, B> Iterator for Zip<A, B> where
A: Iterator,
B: Iterator, type Item = (A::Item, B::Item);
where
Self: Sized,
U: IntoIterator,
A: Iterator,
B: Iterator, type Item = (A::Item, B::Item);
‘Zips up’ two iterators into a single iterator of pairs. Read more
sourcefn intersperse(self, separator: Self::Item) -> Intersperse<Self>ⓘNotable traits for Intersperse<I>impl<I> Iterator for Intersperse<I> where
I: Iterator,
I::Item: Clone, type Item = I::Item;
where
Self: Sized,
Self::Item: Clone,
fn intersperse(self, separator: Self::Item) -> Intersperse<Self>ⓘNotable traits for Intersperse<I>impl<I> Iterator for Intersperse<I> where
I: Iterator,
I::Item: Clone, type Item = I::Item;
where
Self: Sized,
Self::Item: Clone,
I: Iterator,
I::Item: Clone, type Item = I::Item;
Creates a new iterator which places a copy of separator
between adjacent
items of the original iterator. Read more
sourcefn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G>ⓘNotable traits for IntersperseWith<I, G>impl<I, G> Iterator for IntersperseWith<I, G> where
I: Iterator,
G: FnMut() -> I::Item, type Item = I::Item;
where
Self: Sized,
G: FnMut() -> Self::Item,
fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G>ⓘNotable traits for IntersperseWith<I, G>impl<I, G> Iterator for IntersperseWith<I, G> where
I: Iterator,
G: FnMut() -> I::Item, type Item = I::Item;
where
Self: Sized,
G: FnMut() -> Self::Item,
I: Iterator,
G: FnMut() -> I::Item, type Item = I::Item;
Creates a new iterator which places an item generated by separator
between adjacent items of the original iterator. Read more
sourcefn map<B, F>(self, f: F) -> Map<Self, F>ⓘNotable traits for Map<I, F>impl<B, I: Iterator, F> Iterator for Map<I, F> where
F: FnMut(I::Item) -> B, type Item = B;
where
Self: Sized,
F: FnMut(Self::Item) -> B,
fn map<B, F>(self, f: F) -> Map<Self, F>ⓘNotable traits for Map<I, F>impl<B, I: Iterator, F> Iterator for Map<I, F> where
F: FnMut(I::Item) -> B, type Item = B;
where
Self: Sized,
F: FnMut(Self::Item) -> B,
F: FnMut(I::Item) -> B, type Item = B;
Takes a closure and creates an iterator which calls that closure on each element. Read more
1.21.0 · sourcefn for_each<F>(self, f: F) where
Self: Sized,
F: FnMut(Self::Item),
fn for_each<F>(self, f: F) where
Self: Sized,
F: FnMut(Self::Item),
Calls a closure on each element of an iterator. Read more
sourcefn filter<P>(self, predicate: P) -> Filter<Self, P>ⓘNotable traits for Filter<I, P>impl<I: Iterator, P> Iterator for Filter<I, P> where
P: FnMut(&I::Item) -> bool, type Item = I::Item;
where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
fn filter<P>(self, predicate: P) -> Filter<Self, P>ⓘNotable traits for Filter<I, P>impl<I: Iterator, P> Iterator for Filter<I, P> where
P: FnMut(&I::Item) -> bool, type Item = I::Item;
where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
P: FnMut(&I::Item) -> bool, type Item = I::Item;
Creates an iterator which uses a closure to determine if an element should be yielded. Read more
sourcefn filter_map<B, F>(self, f: F) -> FilterMap<Self, F>ⓘNotable traits for FilterMap<I, F>impl<B, I: Iterator, F> Iterator for FilterMap<I, F> where
F: FnMut(I::Item) -> Option<B>, type Item = B;
where
Self: Sized,
F: FnMut(Self::Item) -> Option<B>,
fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F>ⓘNotable traits for FilterMap<I, F>impl<B, I: Iterator, F> Iterator for FilterMap<I, F> where
F: FnMut(I::Item) -> Option<B>, type Item = B;
where
Self: Sized,
F: FnMut(Self::Item) -> Option<B>,
F: FnMut(I::Item) -> Option<B>, type Item = B;
Creates an iterator that both filters and maps. Read more
sourcefn enumerate(self) -> Enumerate<Self>ⓘNotable traits for Enumerate<I>impl<I> Iterator for Enumerate<I> where
I: Iterator, type Item = (usize, <I as Iterator>::Item);
where
Self: Sized,
fn enumerate(self) -> Enumerate<Self>ⓘNotable traits for Enumerate<I>impl<I> Iterator for Enumerate<I> where
I: Iterator, type Item = (usize, <I as Iterator>::Item);
where
Self: Sized,
I: Iterator, type Item = (usize, <I as Iterator>::Item);
Creates an iterator which gives the current iteration count as well as the next value. Read more
sourcefn peekable(self) -> Peekable<Self>ⓘNotable traits for Peekable<I>impl<I: Iterator> Iterator for Peekable<I> type Item = I::Item;
where
Self: Sized,
fn peekable(self) -> Peekable<Self>ⓘNotable traits for Peekable<I>impl<I: Iterator> Iterator for Peekable<I> type Item = I::Item;
where
Self: Sized,
sourcefn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P>ⓘNotable traits for SkipWhile<I, P>impl<I: Iterator, P> Iterator for SkipWhile<I, P> where
P: FnMut(&I::Item) -> bool, type Item = I::Item;
where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P>ⓘNotable traits for SkipWhile<I, P>impl<I: Iterator, P> Iterator for SkipWhile<I, P> where
P: FnMut(&I::Item) -> bool, type Item = I::Item;
where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
P: FnMut(&I::Item) -> bool, type Item = I::Item;
sourcefn take_while<P>(self, predicate: P) -> TakeWhile<Self, P>ⓘNotable traits for TakeWhile<I, P>impl<I: Iterator, P> Iterator for TakeWhile<I, P> where
P: FnMut(&I::Item) -> bool, type Item = I::Item;
where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P>ⓘNotable traits for TakeWhile<I, P>impl<I: Iterator, P> Iterator for TakeWhile<I, P> where
P: FnMut(&I::Item) -> bool, type Item = I::Item;
where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
P: FnMut(&I::Item) -> bool, type Item = I::Item;
Creates an iterator that yields elements based on a predicate. Read more
1.57.0 · sourcefn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>ⓘNotable traits for MapWhile<I, P>impl<B, I: Iterator, P> Iterator for MapWhile<I, P> where
P: FnMut(I::Item) -> Option<B>, type Item = B;
where
Self: Sized,
P: FnMut(Self::Item) -> Option<B>,
fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>ⓘNotable traits for MapWhile<I, P>impl<B, I: Iterator, P> Iterator for MapWhile<I, P> where
P: FnMut(I::Item) -> Option<B>, type Item = B;
where
Self: Sized,
P: FnMut(Self::Item) -> Option<B>,
P: FnMut(I::Item) -> Option<B>, type Item = B;
Creates an iterator that both yields elements based on a predicate and maps. Read more
sourcefn skip(self, n: usize) -> Skip<Self>ⓘNotable traits for Skip<I>impl<I> Iterator for Skip<I> where
I: Iterator, type Item = <I as Iterator>::Item;
where
Self: Sized,
fn skip(self, n: usize) -> Skip<Self>ⓘNotable traits for Skip<I>impl<I> Iterator for Skip<I> where
I: Iterator, type Item = <I as Iterator>::Item;
where
Self: Sized,
I: Iterator, type Item = <I as Iterator>::Item;
Creates an iterator that skips the first n
elements. Read more
sourcefn take(self, n: usize) -> Take<Self>ⓘNotable traits for Take<I>impl<I> Iterator for Take<I> where
I: Iterator, type Item = <I as Iterator>::Item;
where
Self: Sized,
fn take(self, n: usize) -> Take<Self>ⓘNotable traits for Take<I>impl<I> Iterator for Take<I> where
I: Iterator, type Item = <I as Iterator>::Item;
where
Self: Sized,
I: Iterator, type Item = <I as Iterator>::Item;
Creates an iterator that yields the first n
elements, or fewer
if the underlying iterator ends sooner. Read more
sourcefn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F>ⓘNotable traits for Scan<I, St, F>impl<B, I, St, F> Iterator for Scan<I, St, F> where
I: Iterator,
F: FnMut(&mut St, I::Item) -> Option<B>, type Item = B;
where
Self: Sized,
F: FnMut(&mut St, Self::Item) -> Option<B>,
fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F>ⓘNotable traits for Scan<I, St, F>impl<B, I, St, F> Iterator for Scan<I, St, F> where
I: Iterator,
F: FnMut(&mut St, I::Item) -> Option<B>, type Item = B;
where
Self: Sized,
F: FnMut(&mut St, Self::Item) -> Option<B>,
I: Iterator,
F: FnMut(&mut St, I::Item) -> Option<B>, type Item = B;
sourcefn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>ⓘNotable traits for FlatMap<I, U, F>impl<I: Iterator, U: IntoIterator, F> Iterator for FlatMap<I, U, F> where
F: FnMut(I::Item) -> U, type Item = U::Item;
where
Self: Sized,
U: IntoIterator,
F: FnMut(Self::Item) -> U,
fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>ⓘNotable traits for FlatMap<I, U, F>impl<I: Iterator, U: IntoIterator, F> Iterator for FlatMap<I, U, F> where
F: FnMut(I::Item) -> U, type Item = U::Item;
where
Self: Sized,
U: IntoIterator,
F: FnMut(Self::Item) -> U,
F: FnMut(I::Item) -> U, type Item = U::Item;
Creates an iterator that works like map, but flattens nested structure. Read more
1.29.0 · sourcefn flatten(self) -> Flatten<Self>ⓘNotable traits for Flatten<I>impl<I, U> Iterator for Flatten<I> where
I: Iterator<Item: IntoIterator<IntoIter = U, Item = U::Item>>,
U: Iterator, type Item = U::Item;
where
Self: Sized,
Self::Item: IntoIterator,
fn flatten(self) -> Flatten<Self>ⓘNotable traits for Flatten<I>impl<I, U> Iterator for Flatten<I> where
I: Iterator<Item: IntoIterator<IntoIter = U, Item = U::Item>>,
U: Iterator, type Item = U::Item;
where
Self: Sized,
Self::Item: IntoIterator,
I: Iterator<Item: IntoIterator<IntoIter = U, Item = U::Item>>,
U: Iterator, type Item = U::Item;
Creates an iterator that flattens nested structure. Read more
sourcefn fuse(self) -> Fuse<Self>ⓘNotable traits for Fuse<I>impl<I> Iterator for Fuse<I> where
I: Iterator, type Item = <I as Iterator>::Item;
where
Self: Sized,
fn fuse(self) -> Fuse<Self>ⓘNotable traits for Fuse<I>impl<I> Iterator for Fuse<I> where
I: Iterator, type Item = <I as Iterator>::Item;
where
Self: Sized,
I: Iterator, type Item = <I as Iterator>::Item;
sourcefn inspect<F>(self, f: F) -> Inspect<Self, F>ⓘNotable traits for Inspect<I, F>impl<I: Iterator, F> Iterator for Inspect<I, F> where
F: FnMut(&I::Item), type Item = I::Item;
where
Self: Sized,
F: FnMut(&Self::Item),
fn inspect<F>(self, f: F) -> Inspect<Self, F>ⓘNotable traits for Inspect<I, F>impl<I: Iterator, F> Iterator for Inspect<I, F> where
F: FnMut(&I::Item), type Item = I::Item;
where
Self: Sized,
F: FnMut(&Self::Item),
F: FnMut(&I::Item), type Item = I::Item;
Does something with each element of an iterator, passing the value on. Read more
sourcefn by_ref(&mut self) -> &mut Self where
Self: Sized,
fn by_ref(&mut self) -> &mut Self where
Self: Sized,
Borrows an iterator, rather than consuming it. Read more
sourcefn collect<B: FromIterator<Self::Item>>(self) -> B where
Self: Sized,
fn collect<B: FromIterator<Self::Item>>(self) -> B where
Self: Sized,
Transforms an iterator into a collection. Read more
sourcefn try_collect<B>(
&mut self
) -> <<Self::Item as Try>::Residual as Residual<B>>::TryType where
Self: Sized,
<Self as Iterator>::Item: Try,
<<Self as Iterator>::Item as Try>::Residual: Residual<B>,
B: FromIterator<<Self::Item as Try>::Output>,
fn try_collect<B>(
&mut self
) -> <<Self::Item as Try>::Residual as Residual<B>>::TryType where
Self: Sized,
<Self as Iterator>::Item: Try,
<<Self as Iterator>::Item as Try>::Residual: Residual<B>,
B: FromIterator<<Self::Item as Try>::Output>,
Fallibly transforms an iterator into a collection, short circuiting if a failure is encountered. Read more
sourcefn collect_into<E: Extend<Self::Item>>(self, collection: &mut E) -> &mut E where
Self: Sized,
fn collect_into<E: Extend<Self::Item>>(self, collection: &mut E) -> &mut E where
Self: Sized,
Collects all the items from an iterator into a collection. Read more
sourcefn partition<B, F>(self, f: F) -> (B, B) where
Self: Sized,
B: Default + Extend<Self::Item>,
F: FnMut(&Self::Item) -> bool,
fn partition<B, F>(self, f: F) -> (B, B) where
Self: Sized,
B: Default + Extend<Self::Item>,
F: FnMut(&Self::Item) -> bool,
Consumes an iterator, creating two collections from it. Read more
sourcefn partition_in_place<'a, T: 'a, P>(self, predicate: P) -> usize where
Self: Sized + DoubleEndedIterator<Item = &'a mut T>,
P: FnMut(&T) -> bool,
fn partition_in_place<'a, T: 'a, P>(self, predicate: P) -> usize where
Self: Sized + DoubleEndedIterator<Item = &'a mut T>,
P: FnMut(&T) -> bool,
Reorders the elements of this iterator in-place according to the given predicate,
such that all those that return true
precede all those that return false
.
Returns the number of true
elements found. Read more
sourcefn is_partitioned<P>(self, predicate: P) -> bool where
Self: Sized,
P: FnMut(Self::Item) -> bool,
fn is_partitioned<P>(self, predicate: P) -> bool where
Self: Sized,
P: FnMut(Self::Item) -> bool,
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 more
1.27.0 · sourcefn try_fold<B, F, R>(&mut self, init: B, f: F) -> R where
Self: Sized,
F: FnMut(B, Self::Item) -> R,
R: Try<Output = B>,
fn try_fold<B, F, R>(&mut self, init: B, f: F) -> R where
Self: Sized,
F: FnMut(B, Self::Item) -> R,
R: Try<Output = B>,
An iterator method that applies a function as long as it returns successfully, producing a single, final value. Read more
1.27.0 · sourcefn try_for_each<F, R>(&mut self, f: F) -> R where
Self: Sized,
F: FnMut(Self::Item) -> R,
R: Try<Output = ()>,
fn try_for_each<F, R>(&mut self, f: F) -> R where
Self: Sized,
F: FnMut(Self::Item) -> R,
R: Try<Output = ()>,
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
sourcefn fold<B, F>(self, init: B, f: F) -> B where
Self: Sized,
F: FnMut(B, Self::Item) -> B,
fn fold<B, F>(self, init: B, f: F) -> B where
Self: Sized,
F: FnMut(B, Self::Item) -> B,
Folds every element into an accumulator by applying an operation, returning the final result. Read more
1.51.0 · sourcefn reduce<F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(Self::Item, Self::Item) -> Self::Item,
fn reduce<F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(Self::Item, Self::Item) -> Self::Item,
Reduces the elements to a single one, by repeatedly applying a reducing operation. Read more
sourcefn try_reduce<F, R>(
&mut self,
f: F
) -> <<R as Try>::Residual as Residual<Option<R::Output>>>::TryType where
Self: Sized,
F: FnMut(Self::Item, Self::Item) -> R,
R: Try<Output = Self::Item>,
R::Residual: Residual<Option<Self::Item>>,
fn try_reduce<F, R>(
&mut self,
f: F
) -> <<R as Try>::Residual as Residual<Option<R::Output>>>::TryType where
Self: Sized,
F: FnMut(Self::Item, Self::Item) -> R,
R: Try<Output = Self::Item>,
R::Residual: Residual<Option<Self::Item>>,
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
sourcefn all<F>(&mut self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> bool,
fn all<F>(&mut self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> bool,
Tests if every element of the iterator matches a predicate. Read more
sourcefn any<F>(&mut self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> bool,
fn any<F>(&mut self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> bool,
Tests if any element of the iterator matches a predicate. Read more
sourcefn find<P>(&mut self, predicate: P) -> Option<Self::Item> where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
fn find<P>(&mut self, predicate: P) -> Option<Self::Item> where
Self: Sized,
P: FnMut(&Self::Item) -> bool,
Searches for an element of an iterator that satisfies a predicate. Read more
1.30.0 · sourcefn find_map<B, F>(&mut self, f: F) -> Option<B> where
Self: Sized,
F: FnMut(Self::Item) -> Option<B>,
fn find_map<B, F>(&mut self, f: F) -> Option<B> where
Self: Sized,
F: FnMut(Self::Item) -> Option<B>,
Applies function to the elements of iterator and returns the first non-none result. Read more
sourcefn try_find<F, R>(
&mut self,
f: F
) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType where
Self: Sized,
F: FnMut(&Self::Item) -> R,
R: Try<Output = bool>,
R::Residual: Residual<Option<Self::Item>>,
fn try_find<F, R>(
&mut self,
f: F
) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryType where
Self: Sized,
F: FnMut(&Self::Item) -> R,
R: Try<Output = bool>,
R::Residual: Residual<Option<Self::Item>>,
Applies function to the elements of iterator and returns the first true result or the first error. Read more
sourcefn position<P>(&mut self, predicate: P) -> Option<usize> where
Self: Sized,
P: FnMut(Self::Item) -> bool,
fn position<P>(&mut self, predicate: P) -> Option<usize> where
Self: Sized,
P: FnMut(Self::Item) -> bool,
Searches for an element in an iterator, returning its index. Read more
sourcefn rposition<P>(&mut self, predicate: P) -> Option<usize> where
P: FnMut(Self::Item) -> bool,
Self: Sized + ExactSizeIterator + DoubleEndedIterator,
fn rposition<P>(&mut self, predicate: P) -> Option<usize> where
P: FnMut(Self::Item) -> bool,
Self: Sized + ExactSizeIterator + DoubleEndedIterator,
Searches for an element in an iterator from the right, returning its index. Read more
1.6.0 · sourcefn max_by_key<B: Ord, F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item) -> B,
fn max_by_key<B: Ord, F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item) -> B,
Returns the element that gives the maximum value from the specified function. Read more
1.15.0 · sourcefn max_by<F>(self, compare: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
fn max_by<F>(self, compare: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
Returns the element that gives the maximum value with respect to the specified comparison function. Read more
1.6.0 · sourcefn min_by_key<B: Ord, F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item) -> B,
fn min_by_key<B: Ord, F>(self, f: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item) -> B,
Returns the element that gives the minimum value from the specified function. Read more
1.15.0 · sourcefn min_by<F>(self, compare: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
fn min_by<F>(self, compare: F) -> Option<Self::Item> where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Ordering,
Returns the element that gives the minimum value with respect to the specified comparison function. Read more
sourcefn rev(self) -> Rev<Self>ⓘNotable traits for Rev<I>impl<I> Iterator for Rev<I> where
I: DoubleEndedIterator, type Item = <I as Iterator>::Item;
where
Self: Sized + DoubleEndedIterator,
fn rev(self) -> Rev<Self>ⓘNotable traits for Rev<I>impl<I> Iterator for Rev<I> where
I: DoubleEndedIterator, type Item = <I as Iterator>::Item;
where
Self: Sized + DoubleEndedIterator,
I: DoubleEndedIterator, type Item = <I as Iterator>::Item;
Reverses an iterator’s direction. Read more
sourcefn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB) where
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
Self: Sized + Iterator<Item = (A, B)>,
fn unzip<A, B, FromA, FromB>(self) -> (FromA, FromB) where
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
Self: Sized + Iterator<Item = (A, B)>,
Converts an iterator of pairs into a pair of containers. Read more
1.36.0 · sourcefn copied<'a, T: 'a>(self) -> Copied<Self>ⓘNotable traits for Copied<I>impl<'a, I, T: 'a> Iterator for Copied<I> where
I: Iterator<Item = &'a T>,
T: Copy, type Item = T;
where
Self: Sized + Iterator<Item = &'a T>,
T: Copy,
fn copied<'a, T: 'a>(self) -> Copied<Self>ⓘNotable traits for Copied<I>impl<'a, I, T: 'a> Iterator for Copied<I> where
I: Iterator<Item = &'a T>,
T: Copy, type Item = T;
where
Self: Sized + Iterator<Item = &'a T>,
T: Copy,
I: Iterator<Item = &'a T>,
T: Copy, type Item = T;
Creates an iterator which copies all of its elements. Read more
sourcefn cloned<'a, T: 'a>(self) -> Cloned<Self>ⓘNotable traits for Cloned<I>impl<'a, I, T: 'a> Iterator for Cloned<I> where
I: Iterator<Item = &'a T>,
T: Clone, type Item = T;
where
Self: Sized + Iterator<Item = &'a T>,
T: Clone,
fn cloned<'a, T: 'a>(self) -> Cloned<Self>ⓘNotable traits for Cloned<I>impl<'a, I, T: 'a> Iterator for Cloned<I> where
I: Iterator<Item = &'a T>,
T: Clone, type Item = T;
where
Self: Sized + Iterator<Item = &'a T>,
T: Clone,
I: Iterator<Item = &'a T>,
T: Clone, type Item = T;
sourcefn cycle(self) -> Cycle<Self>ⓘNotable traits for Cycle<I>impl<I> Iterator for Cycle<I> where
I: Clone + Iterator, type Item = <I as Iterator>::Item;
where
Self: Sized + Clone,
fn cycle(self) -> Cycle<Self>ⓘNotable traits for Cycle<I>impl<I> Iterator for Cycle<I> where
I: Clone + Iterator, type Item = <I as Iterator>::Item;
where
Self: Sized + Clone,
I: Clone + Iterator, type Item = <I as Iterator>::Item;
Repeats an iterator endlessly. Read more
1.11.0 · sourcefn sum<S>(self) -> S where
Self: Sized,
S: Sum<Self::Item>,
fn sum<S>(self) -> S where
Self: Sized,
S: Sum<Self::Item>,
Sums the elements of an iterator. Read more
1.11.0 · sourcefn product<P>(self) -> P where
Self: Sized,
P: Product<Self::Item>,
fn product<P>(self) -> P where
Self: Sized,
P: Product<Self::Item>,
Iterates over the entire iterator, multiplying all the elements Read more
1.5.0 · sourcefn cmp<I>(self, other: I) -> Ordering where
I: IntoIterator<Item = Self::Item>,
Self::Item: Ord,
Self: Sized,
fn cmp<I>(self, other: I) -> Ordering where
I: IntoIterator<Item = Self::Item>,
Self::Item: Ord,
Self: Sized,
Lexicographically compares the elements of this Iterator
with those
of another. Read more
sourcefn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::Item) -> Ordering,
fn cmp_by<I, F>(self, other: I, cmp: F) -> Ordering where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::Item) -> Ordering,
Lexicographically compares the elements of this Iterator
with those
of another with respect to the specified comparison function. Read more
1.5.0 · sourcefn partial_cmp<I>(self, other: I) -> Option<Ordering> where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
fn partial_cmp<I>(self, other: I) -> Option<Ordering> where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
Lexicographically compares the elements of this Iterator
with those
of another. Read more
sourcefn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering> where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::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::Item) -> Option<Ordering>,
Lexicographically compares the elements of this Iterator
with those
of another with respect to the specified comparison function. Read more
1.5.0 · sourcefn eq<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized,
fn eq<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized,
sourcefn eq_by<I, F>(self, other: I, eq: F) -> bool where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::Item) -> bool,
fn eq_by<I, F>(self, other: I, eq: F) -> bool where
Self: Sized,
I: IntoIterator,
F: FnMut(Self::Item, I::Item) -> bool,
1.5.0 · sourcefn ne<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized,
fn ne<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialEq<I::Item>,
Self: Sized,
1.5.0 · sourcefn lt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
fn lt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
Determines if the elements of this Iterator
are lexicographically
less than those of another. Read more
1.5.0 · sourcefn le<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
fn le<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
Determines if the elements of this Iterator
are lexicographically
less or equal to those of another. Read more
1.5.0 · sourcefn gt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
fn gt<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
Determines if the elements of this Iterator
are lexicographically
greater than those of another. Read more
1.5.0 · sourcefn ge<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
fn ge<I>(self, other: I) -> bool where
I: IntoIterator,
Self::Item: PartialOrd<I::Item>,
Self: Sized,
Determines if the elements of this Iterator
are lexicographically
greater than or equal to those of another. Read more
sourcefn is_sorted_by<F>(self, compare: F) -> bool where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Option<Ordering>,
fn is_sorted_by<F>(self, compare: F) -> bool where
Self: Sized,
F: FnMut(&Self::Item, &Self::Item) -> Option<Ordering>,
Checks if the elements of this iterator are sorted using the given comparator function. Read more
sourcefn is_sorted_by_key<F, K>(self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> K,
K: PartialOrd,
fn is_sorted_by_key<F, K>(self, f: F) -> bool where
Self: Sized,
F: FnMut(Self::Item) -> K,
K: PartialOrd,
Checks if the elements of this iterator are sorted using the given key extraction function. Read more
1.28.0 · sourceimpl<T> RangeBounds<T> for Range<T>
impl<T> RangeBounds<T> for Range<T>
1.28.0 · sourceimpl<T> RangeBounds<T> for Range<&T>
impl<T> RangeBounds<T> for Range<&T>
1.15.0 (const: unstable) · sourceimpl<T> SliceIndex<[T]> for Range<usize>
impl<T> SliceIndex<[T]> for Range<usize>
const: unstable · sourcefn get(self, slice: &[T]) -> Option<&[T]>
fn get(self, slice: &[T]) -> Option<&[T]>
slice_index_methods
)Returns a shared reference to the output at this location, if in bounds. Read more
const: unstable · sourcefn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>
fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>
slice_index_methods
)Returns a mutable reference to the output at this location, if in bounds. Read more
const: unstable · sourceunsafe fn get_unchecked(self, slice: *const [T]) -> *const [T]
unsafe fn get_unchecked(self, slice: *const [T]) -> *const [T]
slice_index_methods
)Returns a shared reference to the output at this location, without
performing any bounds checking.
Calling this method with an out-of-bounds index or a dangling slice
pointer
is undefined behavior even if the resulting reference is not used. Read more
const: unstable · sourceunsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T]
unsafe fn get_unchecked_mut(self, slice: *mut [T]) -> *mut [T]
slice_index_methods
)Returns a mutable reference to the output at this location, without
performing any bounds checking.
Calling this method with an out-of-bounds index or a dangling slice
pointer
is undefined behavior even if the resulting reference is not used. Read more
1.20.0 (const: unstable) · sourceimpl SliceIndex<str> for Range<usize>
impl SliceIndex<str> for Range<usize>
Implements substring slicing with syntax &self[begin .. end]
or &mut self[begin .. end]
.
Returns a slice of the given string from the byte range
[begin
, end
).
This operation is O(1).
Prior to 1.20.0, these indexing operations were still supported by
direct implementation of Index
and IndexMut
.
Panics
Panics if begin
or end
does not point to the starting byte offset of
a character (as defined by is_char_boundary
), if begin > end
, or if
end > len
.
Examples
let s = "Löwe 老虎 Léopard";
assert_eq!(&s[0 .. 1], "L");
assert_eq!(&s[1 .. 9], "öwe 老");
// these will panic:
// byte 2 lies within `ö`:
// &s[2 ..3];
// byte 8 lies within `老`
// &s[1 .. 8];
// byte 100 is outside the string
// &s[3 .. 100];
Runconst: unstable · sourcefn get(self, slice: &str) -> Option<&Self::Output>
fn get(self, slice: &str) -> Option<&Self::Output>
slice_index_methods
)Returns a shared reference to the output at this location, if in bounds. Read more
const: unstable · sourcefn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>
fn get_mut(self, slice: &mut str) -> Option<&mut Self::Output>
slice_index_methods
)Returns a mutable reference to the output at this location, if in bounds. Read more
const: unstable · sourceunsafe fn get_unchecked(self, slice: *const str) -> *const Self::Output
unsafe fn get_unchecked(self, slice: *const str) -> *const Self::Output
slice_index_methods
)Returns a shared reference to the output at this location, without
performing any bounds checking.
Calling this method with an out-of-bounds index or a dangling slice
pointer
is undefined behavior even if the resulting reference is not used. Read more
const: unstable · sourceunsafe fn get_unchecked_mut(self, slice: *mut str) -> *mut Self::Output
unsafe fn get_unchecked_mut(self, slice: *mut str) -> *mut Self::Output
slice_index_methods
)Returns a mutable reference to the output at this location, without
performing any bounds checking.
Calling this method with an out-of-bounds index or a dangling slice
pointer
is undefined behavior even if the resulting reference is not used. Read more
impl<Idx: Eq> Eq for Range<Idx>
impl<A: Step> FusedIterator for Range<A>
impl<Idx> StructuralEq for Range<Idx>
impl<Idx> StructuralPartialEq for Range<Idx>
impl<A: TrustedStep> TrustedLen for Range<A>
Auto Trait Implementations
impl<Idx> RefUnwindSafe for Range<Idx> where
Idx: RefUnwindSafe,
impl<Idx> Send for Range<Idx> where
Idx: Send,
impl<Idx> Sync for Range<Idx> where
Idx: Sync,
impl<Idx> Unpin for Range<Idx> where
Idx: Unpin,
impl<Idx> UnwindSafe for Range<Idx> where
Idx: UnwindSafe,
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more