Replaces the characters of the receiver with those in a given string.
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
The string with which to replace the receiver's content.
aString must not be
Modifying a String
Adds to the end of the receiver the characters of a given string.
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