I'm guessing after repeated use you'd abstract that into a function. Maybe even a collection of them.
Because he's a better programmer than you are, and he knows it.
> It's just a loop.
There are many kinds of common patterns in loops, abstracting them into resuable higher order functions, aka a collections api is rather basic functional programming; "it's just a loop" is a blub phrase of someone who doesn't see the point because they have tried it long enough to understand the value in a different paradigm.
If you've been around for a while, you should have already accepted the benefits of functional programming in the places it's most effective and banished low level procedural programming of loops except in cases where extreme optimization is required. There's no eb and flow here, higher order map/reduce/filter style has been the best way since the 60/70/80's when Lisp and Smalltalk were doing it.