samePosition(in:)

Returns the position in the given view of Unicode scalars that corresponds exactly to this index.

func samePosition(in unicodeScalars: String.UnicodeScalarView) -> String.UnicodeScalarIndex?

Mangled symbol

sSS5IndexV12samePosition2inABSgSS17UnicodeScalarViewV_tF What are these?

FNV24 hash: 4YEO1

Parameters

unicodeScalars: The view to use for the index conversion. This index must be a valid index of at least one view of the string shared by unicodeScalars.

The position in unicodeScalars that corresponds exactly to this index. If this index does not have an exact corresponding position in unicodeScalars, this method returns nil. For example, an attempt to convert the position of a UTF-16 trailing surrogate returns nil.

This index must be a valid index of String(unicodeScalars).utf16.

This example first finds the position of a space (UTF-16 code point 32) in a string’s utf16 view and then uses this method to find the same position in the string’s unicodeScalars view.

let cafe = "Café 🍵"
let i = cafe.utf16.firstIndex(of: 32)!
let j = i.samePosition(in: cafe.unicodeScalars)!
print(String(cafe.unicodeScalars[..<j]))
// Prints "Café"