Struct std::str::Chars 1.0.0
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pub struct Chars<'a> { /* fields omitted */ }
An iterator over the char
s of a string slice.
This struct is created by the chars
method on str
.
See its documentation for more.
Methods
impl<'a> Chars<'a>
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pub fn as_str(&self) -> &'a str
1.4.0[src]
View the underlying data as a subslice of the original data.
This has the same lifetime as the original slice, and so the iterator can continue to be used while this exists.
Examples
let mut chars = "abc".chars(); assert_eq!(chars.as_str(), "abc"); chars.next(); assert_eq!(chars.as_str(), "bc"); chars.next(); chars.next(); assert_eq!(chars.as_str(), "");Run
Trait Implementations
impl<'a> Debug for Chars<'a>
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fn fmt(&self, __arg_0: &mut Formatter) -> Result<(), Error>
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Formats the value using the given formatter. Read more
impl<'a> DoubleEndedIterator for Chars<'a>
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fn next_back(&mut self) -> Option<char>
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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, Self::Item) -> R,
R: Try<Ok = B>,
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F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>,
This is the reverse version of [try_fold()
]: it takes elements starting from the back of the iterator. Read more
fn rfold<B, F>(self, accum: B, f: F) -> B where
F: FnMut(B, Self::Item) -> B,
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F: FnMut(B, Self::Item) -> B,
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> Clone for Chars<'a>
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ⓘImportant traits for Chars<'a>fn clone(&self) -> Chars<'a>
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl<'a> FusedIterator for Chars<'a>
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impl<'a> Iterator for Chars<'a>
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type Item = char
The type of the elements being iterated over.
fn next(&mut self) -> Option<char>
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Advances the iterator and returns the next value. Read more
fn count(self) -> usize
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Consumes the iterator, counting the number of iterations and returning it. 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 last(self) -> Option<char>
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Consumes the iterator, returning the last element. Read more
fn nth(&mut self, n: usize) -> Option<Self::Item>
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Returns the n
th element of the iterator. 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 try_fold<B, F, R>(&mut self, init: B, f: F) -> R where
F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>,
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F: FnMut(B, Self::Item) -> R,
R: Try<Ok = B>,
An iterator method that applies a function as long as it returns successfully, producing a single, final value. Read more
fn fold<B, F>(self, init: B, f: F) -> B where
F: FnMut(B, Self::Item) -> B,
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F: FnMut(B, Self::Item) -> B,
An iterator method that applies a function, producing a single, final value. 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 position<P>(&mut self, predicate: P) -> Option<usize> where
P: FnMut(Self::Item) -> bool,
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P: FnMut(Self::Item) -> bool,
Searches for an element in an iterator, returning its index. Read more
fn rposition<P>(&mut self, predicate: P) -> Option<usize> where
P: FnMut(Self::Item) -> bool,
Self: ExactSizeIterator + DoubleEndedIterator,
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P: FnMut(Self::Item) -> bool,
Self: ExactSizeIterator + DoubleEndedIterator,
Searches for an element in an iterator from the right, returning its index. 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