Comment by mahboi

Reduce always makes me question the performance and order of operations. The most I'll do in Python is like

  sum(x[1] for x in args)

which is map + reduce. And that's only if x[1] is a number. That's about it. No equivalent in JS. Whenever some JS code has map, I'm like why, and rewrite it as a loop.

This is also assuming we're talking about regular code and not an actual map-reduce framework like Spark.