Text similarity algorithm

Question

I have two subtitles files. I need a function that tells whether they represent the same text, or the similar text

Sometimes there are comments like \"The w

Answer 1

Levenshtein algorithm: http://en.wikipedia.org/wiki/Levenshtein_distance

Anything other than a result of zero means the text are not "identical". "Similar" is a measure of how far/near they are. Result is an integer.