No overview available.
SDK
- Xcode 9.0+
Framework
- Swift Standard Library
Declaration
@frozen struct UTF16View
StructureSubstring
Substring
Topics
Type Aliases
typealias SubstringA type representing the sequence’s elements.
typealias SubstringA type that represents a position in the collection.
typealias SubstringA type that represents the indices that are valid for subscripting the collection, in ascending order.
typealias SubstringA type that provides the collection’s iteration interface and encapsulates its iteration state.
typealias SubstringA sequence that represents a contiguous subrange of the collection’s elements.
Instance Properties
var count: IntThe number of elements in the collection.
var endThe collection’s “past the end” position—that is, the position one greater than the last valid subscript argument.
var first: StringThe first element of the collection.
var indices: SubstringThe indices that are valid for subscripting the collection, in ascending order.
var isA Boolean value indicating whether the collection is empty.
var last: StringThe last element of the collection.
var lazy: LazyA sequence containing the same elements as this sequence, but on which some operations, such as map and filter, are implemented lazily.
var startThe position of the first element in a nonempty collection.
var underestimatedA value less than or equal to the number of elements in the collection.
Instance Methods
func allReturns a Boolean value indicating whether every element of a sequence satisfies a given predicate.
func compactReturns an array containing the non-nil results of calling the given transformation with each element of this sequence.
func contains(StringReturns a Boolean value indicating whether the sequence contains the given element.
func contains(where: (StringReturns a Boolean value indicating whether the sequence contains an element that satisfies the given predicate.
func difference<C>(from: C) -> CollectionReturns the difference needed to produce this collection’s ordered elements from the given collection.
func difference<C>(from: C, by: (CReturns the difference needed to produce this collection’s ordered elements from the given collection, using the given predicate as an equivalence test.
func distance(from: SubstringReturns the distance between two indices.
func drop(while: (StringReturns a subsequence by skipping elements while predicate returns true and returning the remaining elements.
func dropReturns a subsequence containing all but the given number of initial elements.
func dropReturns a subsequence containing all but the specified number of final elements.
func elementsReturns a Boolean value indicating whether this sequence and another sequence contain the same elements in the same order.
func elementsReturns a Boolean value indicating whether this sequence and another sequence contain equivalent elements in the same order, using the given predicate as the equivalence test.
func enumerated() -> EnumeratedReturns a sequence of pairs (n, x), where n represents a consecutive integer starting at zero and x represents an element of the sequence.
func filter((StringReturns an array containing, in order, the elements of the sequence that satisfy the given predicate.
func first(where: (StringReturns the first element of the sequence that satisfies the given predicate.
func firstReturns the first index where the specified value appears in the collection.
func firstReturns the first index in which an element of the collection satisfies the given predicate.
func flatReturns an array containing the concatenated results of calling the given transformation with each element of this sequence.
func forCalls the given closure on each element in the sequence in the same order as a for-in loop.
func formOffsets the given index by the specified distance.
func formOffsets the given index by the specified distance, or so that it equals the given limiting index.
func formReplaces the given index with its successor.
func formReplaces the given index with its predecessor.
func index(SubstringReturns an index that is the specified distance from the given index.
func index(SubstringReturns an index that is the specified distance from the given index, unless that distance is beyond a given limiting index.
func index(after: SubstringReturns the position immediately after the given index.
func index(before: SubstringReturns the position immediately before the given index.
func index(of: StringReturns the first index where the specified value appears in the collection.
func index(where: (StringReturns the first index in which an element of the collection satisfies the given predicate.
func last(where: (StringReturns the last element of the sequence that satisfies the given predicate.
func lastReturns the last index where the specified value appears in the collection.
func lastReturns the index of the last element in the collection that matches the given predicate.
func lexicographicallyReturns a Boolean value indicating whether the sequence precedes another sequence in a lexicographical (dictionary) ordering, using the less-than operator (<) to compare elements.
func lexicographicallyReturns a Boolean value indicating whether the sequence precedes another sequence in a lexicographical (dictionary) ordering, using the given predicate to compare elements.
func makeReturns an iterator over the elements of the collection.
func map<T>((StringReturns an array containing the results of mapping the given closure over the sequence’s elements.
func max() -> StringReturns the maximum element in the sequence.
func max(by: (StringReturns the maximum element in the sequence, using the given predicate as the comparison between elements.
func min() -> StringReturns the minimum element in the sequence.
func min(by: (StringReturns the minimum element in the sequence, using the given predicate as the comparison between elements.
func popRemoves and returns the first element of the collection.
func popRemoves and returns the last element of the collection.
func prefix(Int) -> SubstringReturns a subsequence, up to the specified maximum length, containing the initial elements of the collection.
func prefix(through: StringReturns a subsequence from the start of the collection through the specified position.
func prefix(upReturns a subsequence from the start of the collection up to, but not including, the specified position.
func prefix(while: (StringReturns a subsequence containing the initial elements until predicate returns false and skipping the remaining elements.
func randomReturns a random element of the collection.
func randomReturns a random element of the collection, using the given generator as a source for randomness.
func reduce<Result>(Result, (Result, StringReturns the result of combining the elements of the sequence using the given closure.
func reduce<Result>(into: Result, (inout Result, StringReturns the result of combining the elements of the sequence using the given closure.
func removeRemoves and returns the first element of the collection.
func removeRemoves the specified number of elements from the beginning of the collection.
func removeRemoves and returns the last element of the collection.
func removeRemoves the given number of elements from the end of the collection.
func reversed() -> ReversedReturns a view presenting the elements of the collection in reverse order.
func shuffled() -> [StringReturns the elements of the sequence, shuffled.
func shuffled<T>(using: inout T) -> [StringReturns the elements of the sequence, shuffled using the given generator as a source for randomness.
func sorted() -> [StringReturns the elements of the sequence, sorted.
func sorted(by: (StringReturns the elements of the sequence, sorted using the given predicate as the comparison between elements.
func split(maxReturns the longest possible subsequences of the collection, in order, that don’t contain elements satisfying the given predicate.
func split(separator: StringReturns the longest possible subsequences of the collection, in order, around elements equal to the given element.
func starts<PossibleReturns a Boolean value indicating whether the initial elements of the sequence are the same as the elements in another sequence.
func starts<PossibleReturns a Boolean value indicating whether the initial elements of the sequence are equivalent to the elements in another sequence, using the given predicate as the equivalence test.
func suffix(Int) -> SubstringReturns a subsequence, up to the given maximum length, containing the final elements of the collection.
func suffix(from: StringReturns a subsequence from the specified position to the end of the collection.
func withCall body(p), where p is a pointer to the collection’s contiguous storage. If no such storage exists, it is first created. If the collection does not support an internal representation in a form of contiguous storage, body is not called and nil is returned.
Subscripts
subscript(Range<SubstringAccesses a contiguous subrange of the collection’s elements.
subscript<R>(R) -> SubstringAccesses the contiguous subrange of the collection’s elements specified by a range expression.
subscript(SubstringAccesses the element at the specified position.