Methods in groovy collections

collection.groovy

assert "Found 2" == [1,2,3].findResult { it > 1 ? "Found $it" : null } // Return if not null

assert ["Found 2", "Found 3"] == [1,2,3].findResults { it > 1 ? "Found $it" : null }

assert 1*1*2*3 == [1,2,3].inject(1) { acc, val -> acc * val }

assert [2,4,6] == [1,2,3].collect { it * 2 }

assert [2,4] == [1,2,3,4].findAll { it % 2 == 0 }

//See API: http://docs.groovy-lang.org/latest/html/groovy-jdk/java/util/Collection.html