insert(_:at:)
Inserts a new character at the specified position.
Declaration
mutating func insert(_ newElement: Character, at i: String.Index)Parameters
- newElement:
The new character to insert into the string.
- i:
A valid index of the string. If
iis equal to the string’s end index, this methods appendsnewElementto the string.
Discussion
Calling this method invalidates any existing indices for use with this string.