Question

Is there any fast way in JavaScript to find out if 2 Strings contain the same substring? e.g. I have these 2 Strings: "audi is a car" and "audiA8".

As you see the word "audi" is in both strings but we cannot find it out with a simple indexOf or RegExp, because of other characters in both strings.

Answer 1

Take a look at the similar text function implementation here. It returns the number of matching chars in both strings.

For your example it would be:

similar_text("audi is a car", "audiA8") // -> 4

which means that strings have 4-char common substring.