Test if string contains anything from an array of strings (kotlin)

You can use the filter function to leave only those keywords contained in content:

val match = keywords.filter { it in content }

Here match is a List<String>. If you want to get an array in the result, you can add .toTypedArray() call.

in operator in the expression it in content is the same as content.contains(it).

If you want to have case insensitive match, you need to specify ignoreCase parameter when calling contains:

val match = keywords.filter { content.contains(it, ignoreCase = true) }