Is "powerful" really even the right description? I can't even do a map + filter without looping through the array twice. Ew. I guess I'll just stick with the pr

Is "powerful" really even the right description? I can't even do a map + filter without looping through the array twice. Ew. I guess I'll just stick with the primitive foreach loop (which leaves a dangling allocated object after you use it... sigh).