On: Don't use CoffeeScript

[hardwaresofton]

Hey quick question, maybe you should use map instead of filter?

http://www.dotnetspeaks.com/DisplayArticle.aspx?ID=117 (random site with example)

map is the functional equivalent of what you're trying to do there, not filter.

[jffry → hardwaresofton]

His criticism still stands that the JS implementation of

  (number * number for number in nums)

...is inefficient, and that it could've been translated into much more efficient JS than it was.

[city41 → jffry]

It's really not inefficient though. Array.map will be much slower in just about all environments.

[hardwaresofton → city41]

[EDIT] - People have followed up, turns out the comprehension is faster.