... simply because Character in swift represents extended grapheme clusters, not unicode scalarsutf code points.
... simply because Character in swift represents extended grapheme clusters, not unicode scalars.
... simply because Character in swift represents extended grapheme clusters, not utf code points.
let precomposed = "\u{D55C}" // 한
let decomposed = "\u{1112}\u{1161}\u{11AB}" // 한
precomposed == decomposed // true
precomposed.characters.indices // 0..<1
decomposed.characters.indices // 0..<3
And in the case of Martin's rangeOfString example:
let s1 = "f🇩🇰oo"
let s2 = "ba🇨🇰r"
let r1 = s1.characters.indices // 0..<7
r1.count // 4
s1.utf16.count // 7
let i = r1.startIndex // 0
i.successor().successor() // 5 (i therefore holds reference to s1!!!)
let precomposed = "\u{D55C}" // 한
let decomposed = "\u{1112}\u{1161}\u{11AB}" // 한
precomposed == decomposed // true
precomposed.characters.indices // 0..<1
decomposed.characters.indices // 0..<3
And in the case of Martin's rangeOfString example:
let s1 = "f🇩🇰oo"
let s2 = "ba🇨🇰r"
let r1 = s1.characters.indices // 0..<7
r1.count // 4
s1.utf16.count // 7
let i = r1.startIndex // 0
i.successor().successor() // 5 (i therefore holds reference to s1!!!)
let s1 = "f🇩🇰oo"
let s2 = "ba🇨🇰r"
let r1 = s1.characters.indices // 0..<7
r1.count // 4
s1.utf16.count // 7
let i = r1.startIndex // 0
i.successor().successor() // 5 (i therefore holds reference to s1!!!)
let s1 = "f🇩🇰oo"
let s2 = "ba🇨🇰r"
let r1 = s1.characters.indices // 0..<7
r1.count // 4
s1.utf16.count // 7
r1.startIndex let i = r1.startIndex // 0
r1i.startIndexsuccessor().advancedBysuccessor(2) // 5 (i therefore holds reference //to 5s1!!!)
let s1 = "f🇩🇰oo"
let s2 = "ba🇨🇰r"
let r1 = s1.characters.indices // 0..<7
r1.count // 4
s1.utf16.count // 7
r1.startIndex // 0
r1.startIndex.advancedBy(2) // 5
let s1 = "f🇩🇰oo"
let s2 = "ba🇨🇰r"
let r1 = s1.characters.indices // 0..<7
r1.count // 4
s1.utf16.count // 7
let i = r1.startIndex // 0
i.successor().successor() // 5 (i therefore holds reference to s1!!!)
default