Update: String extensions

The post that contains String extensions has been updated.

It now includes the new functions:

    /// Returns true if the character at the given index is a lowercase character as defined in the lowercase character set. Works for UTF16 characters only.

    

    func isLowercaseCharacterAtIndex(index: String.Index) -> Bool {...}

    

    

    /// Returns true if the character at the given index is an uppercase character as defined in the lowercase character set. Works for UTF16 characters only.

    func isUppercaseCharacterAtIndex(index: String.Index) -> Bool {...}

    

    /// Replaces the character at the specified index with the given character. Returns true if the string was changed, false if not.

    

    mutating func replaceCharacterAtIndex(index: String.Index, with char: Character) -> Bool {...}

    

    

    /// Changes the case of the character at the specified index if the character is a member of either the lowercase character set or the uppercase character set. Returns true if the string was changed, false if not.

    

    mutating func changeCaseOfCharacterAtIndex(index: String.Index) -> Bool {...}

Note that while these functions only work for UTF16 characters, the String they work on may contain  other characters as well.

Happy coding...

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