Function eachWithIndex

public/javascripts/socket.io.js:5884–5889

(i, el, cb)

	  var next = after(ary.length, done);

	  var eachWithIndex = function(i, el, cb) {
	    each(el, function(error, msg) {
	      result[i] = msg;
	      cb(error, result);
	    });
	  };

	  for (var i = 0; i < ary.length; i++) {
	    eachWithIndex(i, ary[i], next);