Also, unlike the for loop alternative, it clearly expresses the intent. "I am filtering this array, using this condition". The functional programming style real

Also, unlike the for loop alternative, it clearly expresses the intent. "I am filtering this array, using this condition". The functional programming style really shines here, and it shines even more whan you start chaining the operations. I guess the rule of thumb is to write code to most clearly express the intent of it. Often harder said than done but a good goal to strive for.