`by` value is uncached

[satyr]

$ coffee -bpe 'for v in f() by g() then'
var v, _i, _len, _ref;
_ref = f();
for (_i = 0, _len = _ref.length; _i < _len; _i += g()) {
  v = _ref[_i];}

[geraldalewis]

Working on a patch now (thanks for the heads up, @michaelficarra :)).

[satyr]

thanks for the heads up, @michaelficarra :)

??

[michaelficarra]

haha, I gave @geraldalewis a small list of issues that would be easy to fix

[geraldalewis]

Heheh -- sorry for the confusion, @satyr :)

[jashkenas]

As part of the range comprehension optimizations in #1356, range comprehension steps are now cached...