Looping syntax

for_in.js

for (var thing in {'foo':1, 'bar':1, 'neat':1}) {
  console.log('doing ' + thing)
  doing(thing)
}

I will begin trying this style out. See how it fits.

It is tight syntax to iterate through a "list" of strings (in an undefined order). It is not the ideal for-in syntax; but it's valid syntax, and iterating through a hard-coded set of strings is really common.

Why is this better than a forEach on an array literal?

;['foo','bar','neat'].forEach(function (thing) {
  console.log('doing ' + thing)
  doing(thing)
})

I am kind of anti the leading semicolon. Of course I understand its syntactic need. But I kind of feel like, if it's worth iterating through a set of strings, it's worth giving that set a name.

var keywords = ['foo', 'bar', 'neat']
keywords.forEach(/* ... */)

I realize that my point undermines the entire purpose of this Gist. And in the intervening five months I had not even thought to try the new syntax. So it never caught on, even in its author's mind.

P.S. Happy new year!