Compactness is more of a side effect and can be a detrimental one. Personally I find that this kind of code is more declarative of intent than the more imperati

Compactness is more of a side effect and can be a detrimental one. Personally I find that this kind of code is more declarative of intent than the more imperative for loop. By using particular functional tools for the job you're avoiding any possibility of a bug in your looping construct and making your purpose explicit. I also like how it removes boiler plate to handle different container types making it easier to switch to different ones.