Avoid forEach - ÆFLASH

Iterate over a collection. For side effects — the mori.each docs First of all, this post is not about performance. for-loops will always be faster than Array.forEach. If profiling reveals that the overhead of iteration is significant enough and performance is paramount, then you should definitely avoid forEach and use a for-loop. (I would also add that always using a for-loop is the quintessential

[yosuke_furukawa]

forEach文は副作用あるから使わないほうがいいっていう主張。なるべく、underscoreとかlodashの構文を使って副作用がないコードを書いたほうが良い