Function _eachOfLimit

public/javascripts/async.js:291–332

(limit)

    };

    function _eachOfLimit(limit) {

        return function (obj, iterator, callback) {
            callback = _once(callback || noop);
            obj = obj || [];
            var nextKey = _keyIterator(obj);
            if (limit <= 0) {
                return callback(null);
            }
            var done = false;
            var running = 0;
            var errored = false;

            (function replenish () {
                if (done && running <= 0) {
                    return callback(null);
                }

                while (running < limit && !errored) {
                    var key = nextKey();
                    if (key === null) {
                        done = true;
                        if (running <= 0) {
                            callback(null);
                        }
                        return;
                    }
                    running += 1;
                    iterator(obj[key], key, only_once(function (err) {
                        running -= 1;
                        if (err) {
                            callback(err);
                            errored = true;
                        }
                        else {
                            replenish();
                        }
                    }));
                }
            })();
        };
    }


    function doParallel(fn) {