Question

Given a unordered list of List<String>, I need to find whether there exist a String that matches supplied String.

So, i loop

    for (String k : keys) {
        if (Utils.keysMatch(k, anotherKey)) {
            result = true;
            break;
        }
    }

Where Utils.keysMatch checks if appropriate matching can happen.

Can the same be done without a complete iteration? Note that k may be a regular expression.

Answer 1

You can do it in elegant way with Guava’s Iterables.any method and static Predicates class

like this:


return Iterables.any(keys, Predicates.containsPattern(k);