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Yeah, Ruby and Javascript have a close proximity—flgr once gave us proof. MenTaL spotted a list of additions to Javascript arrays, which reeks of the Ruby Way.

Of special note is the addition of forEach, but just look how valuable the Ruby equivalents of these methods have become to us:

Interesting. I’m reading here and each of the iterators sends three parameters to the “block”. The value, the current index and the array itself.

 var aNumbers = [4, 2, 6, 9];
 var aTimesTwoNumbers = aNumbers.map(function (v, i, ary) {
   return v * 2;
 });

It’s that index value. We’ve never known where to put it. I believe in Javascript you can safely omit parameters you’re not using. (via webref.)