stringLastIndexOf

The stringLastIndexOf method is a built-in function found in many programming languages that is used to find the last occurrence of a specified substring within a given string. It searches the string from right to left, returning the starting index of the last match found. If the substring is not found within the string, the method typically returns a value of -1.

The method usually accepts two arguments: the substring to search for, and optionally, the starting position from which to begin the search (also from the right). If no starting position is specified, the search begins from the very end of the string. The returned index is zero-based, meaning the first character of the string is at index 0.

This function is useful in scenarios where you need to identify the final instance of a pattern or character sequence within a larger string. For example, in file path manipulation, stringLastIndexOf can be used to find the last occurrence of a path separator (like '/' or '\') to extract the filename. It's also commonly used in text processing for tasks such as validating input or parsing data. The specific implementation and exact return values might vary slightly between different programming languages, but the core functionality remains consistent.