| 'use strict'; |
| |
| Object.defineProperty(exports, "__esModule", { |
| value: true |
| }); |
| |
| var _wrapAsync = require('./internal/wrapAsync'); |
| |
| var _wrapAsync2 = _interopRequireDefault(_wrapAsync); |
| |
| var _mapLimit = require('./mapLimit'); |
| |
| var _mapLimit2 = _interopRequireDefault(_mapLimit); |
| |
| var _awaitify = require('./internal/awaitify'); |
| |
| var _awaitify2 = _interopRequireDefault(_awaitify); |
| |
| function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
| |
| /** |
| * The same as [`concat`]{@link module:Collections.concat} but runs a maximum of `limit` async operations at a time. |
| * |
| * @name concatLimit |
| * @static |
| * @memberOf module:Collections |
| * @method |
| * @see [async.concat]{@link module:Collections.concat} |
| * @category Collection |
| * @alias flatMapLimit |
| * @param {Array|Iterable|AsyncIterable|Object} coll - A collection to iterate over. |
| * @param {number} limit - The maximum number of async operations at a time. |
| * @param {AsyncFunction} iteratee - A function to apply to each item in `coll`, |
| * which should use an array as its result. Invoked with (item, callback). |
| * @param {Function} [callback] - A callback which is called after all the |
| * `iteratee` functions have finished, or an error occurs. Results is an array |
| * containing the concatenated results of the `iteratee` function. Invoked with |
| * (err, results). |
| * @returns A Promise, if no callback is passed |
| */ |
| function concatLimit(coll, limit, iteratee, callback) { |
| var _iteratee = (0, _wrapAsync2.default)(iteratee); |
| return (0, _mapLimit2.default)(coll, limit, (val, iterCb) => { |
| _iteratee(val, (err, ...args) => { |
| if (err) return iterCb(err); |
| return iterCb(err, args); |
| }); |
| }, (err, mapResults) => { |
| var result = []; |
| for (var i = 0; i < mapResults.length; i++) { |
| if (mapResults[i]) { |
| result = result.concat(...mapResults[i]); |
| } |
| } |
| |
| return callback(err, result); |
| }); |
| } |
| exports.default = (0, _awaitify2.default)(concatLimit, 4); |
| module.exports = exports['default']; |