This library calculate the difference between 2 strings using the Levenshtein distance algorithm.

For this algorithm in detail, see https://en.wikipedia.org/wiki/Levenshtein_distance.

To use it, just provide two source strings to compare.

A flag Case Sensitive allowed to compare different case, either lower and capital is considered different or not.

If case one string is empty then the result will be the length of the other string.