findStart
Finds the starting index of the first occurrence of the specified substring in the string, or returns -1 if not found.
Finds the starting index of the first occurrence of the specified character in the string, or returns -1 if not found.
Finds the starting index of the first occurrence of the specified substring in the string, or returns -1 if not found.
Finds the starting index of the first occurrence of the specified character in the string, or returns -1 if not found.