These values represent the options available to many of the string classes’ search and comparison methods.
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Framework
struct CompareOptions
See Searching, Comparing, and Sorting Strings for details on the effects of these options.
static var caseA case-insensitive search.
static var literal: NSStringExact character-by-character equivalence.
static var backwards: NSStringSearch from end of source string.
static var anchored: NSStringSearch is limited to start (or end, if NSBackwards) of source string.
static var numeric: NSStringNumbers within strings are compared using numeric value, that is, Name2 < Name7 < Name25.
static var diacriticSearch ignores diacritic marks.
static var widthSearch ignores width differences in characters that have full-width and half-width forms, as occurs in East Asian character sets.
static var forcedComparisons are forced to return either NSOrdered or NSOrdered if the strings are equivalent but not strictly equal.
static var regularThe search string is treated as an ICU-compatible regular expression. If set, no other options can apply except case and anchored. You can use this option only with the range… methods and replacing.
func caseReturns the result of invoking compare(_: with NSCase as the only option.
func localizedCompares the string with a given string using a case-insensitive, localized, comparison.
func compare(String) -> ComparisonReturns the result of invoking compare(_: with no options and the receiver’s full extent as the range.
func localizedCompares the string and a given string using a localized comparison.
func compare(String, options: NSStringCompares the string with the specified string using the given options.
func compare(String, options: NSStringReturns the result of invoking compare(_: with a nil locale.
func compare(String, options: NSStringCompares the string using the specified options and returns the lexical ordering for the range.
func localizedCompares strings as sorted by the Finder.
func hasReturns a Boolean value that indicates whether a given string matches the beginning characters of the receiver.
func hasReturns a Boolean value that indicates whether a given string matches the ending characters of the receiver.
func isReturns a Boolean value that indicates whether a given string is equal to the receiver using a literal Unicode-based comparison.
var hash: IntAn unsigned integer that can be used as a hash table address.
struct NSStringOptions for converting string encodings.