950

coffee

for x, index in [1, 2, 3]
  console.log index
  index++

current.js

var index, x, _len, _ref;
_ref = [1, 2, 3];
for (index = 0, _len = _ref.length; index < _len; index++) {
  x = _ref[index];
  console.log(index);
  index++;
}

proposed.js

var index, x, _len, _ref, _ref2;
_ref = [1, 2, 3];
for (_ref2 = 0, _len = _ref.length; _ref2 < _len; _ref2++) {
  x = _ref[_ref2];
  index = _ref2;
  console.log(index);
  index++;
}