var ss = ["apple", "Apple", "banana"] ss.sort() print(ss) // "["Apple", "apple", "banana"]\n" ss.sort { (a, b) in a.lexicographicallyPrecedes(b) } print(ss) // "["Apple", "apple", "banana"]\n"
3:22 AM
↑とりあえずまずはこう
3:23 AM
@_inlineable @_versioned internal static func compare( _ left: _StringGuts, to right: _StringGuts ) -> Int { defer { _fixLifetime(left) } defer { _fixLifetime(right) } #if _runtime(_ObjC) // We only want to perform this optimization on objc runtimes. Elsewhere, // we will make it follow the unicode collation algorithm even for ASCII. // This is consistent with Foundation, but incorrect as defined by Unicode. // // FIXME: String ordering should be consistent across all platforms. if left.isASCII && right.isASCII { let leftASCII = left._unmanagedASCIIView let rightASCII = right._unmanagedASCIIView let result = leftASCII.compareASCII(to: rightASCII) return result } #endif return _compareDeterministicUnicodeCollation( _leftUnsafeStringGutsBitPattern: left.rawBits, _rightUnsafeStringGutsBitPattern: right.rawBits) }
