[kolme]

> every cycle creates an anonymous function

No, that's not how it works. The function is evaluated once before the call and passed as an argument, then internally reused.

Also, you're microptimizing. Prioritizing supposed performance over readability.

And yes, for-loops and mutable structures are more error prone than map-filter-reduce. The original is OK but could be better.

[azangru]

> No, that's not how it works. The function is evaluated once before the call and passed as an argument, then internally reused.

Yes, sorry; you are right of course.