code: function (c) {
                  var j = $([0]), i = -1, l = this.length;
                  while (
                      ++i < l
                      && (j.context = j[0] = this[i])
                      && c.call(j[0], i, j) !== false //"this"=DOM, i=index, j=jQuery object
                  );
                  return this;
              }
docs: /*
  4-10 times faster .each replacement
  use it carefully, as it overrides jQuery context of element on each iteration