Author picked up a quite convenient example to show methods/lambda superiority.

I prefer list/set/dict comprehensions any day. It's more general, doesn't require to know a myriad of different methods (which could not exists for all collections, PHP and JS are especially bad with this) and easily extendable to nested loops.

Yes it could be `[for line in text.splitlines() if line: for word in line.split(): word.upper()]`. But it is what it is. BTW I bet rust variant would be quite elaborate.