Function _asyncMap

examples/browser/nodeunit.js:650–663

(eachfn, arr, iterator, callback)

    var _asyncMap = function (eachfn, arr, iterator, callback) {
        var results = [];
        arr = _map(arr, function (x, i) {
            return {index: i, value: x};
        });
        eachfn(arr, function (x, callback) {
            iterator(x.value, function (err, v) {
                results[x.index] = v;
                callback(err);
            });
        }, function (err) {
            callback(err, results);
        });
    };
    async.map = doParallel(_asyncMap);
    async.mapSeries = doSeries(_asyncMap);