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'use strict'; |
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|
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Object.defineProperty(exports, "__esModule", { |
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value: true |
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}); |
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|
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exports.default = function (coll, limit, iteratee, callback) { |
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callback = callback || _noop2.default; |
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var _iteratee = (0, _wrapAsync2.default)(iteratee); |
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(0, _mapLimit2.default)(coll, limit, function (val, callback) { |
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_iteratee(val, function (err, key) { |
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if (err) return callback(err); |
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return callback(null, { key: key, val: val }); |
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}); |
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}, function (err, mapResults) { |
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var result = {}; |
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// from MDN, handle object having an `hasOwnProperty` prop |
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var hasOwnProperty = Object.prototype.hasOwnProperty; |
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|
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for (var i = 0; i < mapResults.length; i++) { |
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if (mapResults[i]) { |
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var key = mapResults[i].key; |
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var val = mapResults[i].val; |
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|
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if (hasOwnProperty.call(result, key)) { |
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result[key].push(val); |
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} else { |
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result[key] = [val]; |
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} |
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} |
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} |
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|
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return callback(err, result); |
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}); |
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}; |
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|
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var _noop = require('lodash/noop'); |
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|
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var _noop2 = _interopRequireDefault(_noop); |
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|
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var _mapLimit = require('./mapLimit'); |
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|
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var _mapLimit2 = _interopRequireDefault(_mapLimit); |
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|
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var _wrapAsync = require('./internal/wrapAsync'); |
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|
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var _wrapAsync2 = _interopRequireDefault(_wrapAsync); |
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|
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
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|
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; |
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/** |
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* The same as [`groupBy`]{@link module:Collections.groupBy} but runs a maximum of `limit` async operations at a time. |
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* |
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* @name groupByLimit |
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* @static |
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* @memberOf module:Collections |
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* @method |
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* @see [async.groupBy]{@link module:Collections.groupBy} |
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* @category Collection |
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* @param {Array|Iterable|Object} coll - A collection to iterate over. |
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* @param {number} limit - The maximum number of async operations at a time. |
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* @param {AsyncFunction} iteratee - An async function to apply to each item in |
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* `coll`. |
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* The iteratee should complete with a `key` to group the value under. |
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* Invoked with (value, callback). |
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* @param {Function} [callback] - A callback which is called when all `iteratee` |
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* functions have finished, or an error occurs. Result is an `Object` whoses |
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* properties are arrays of values which returned the corresponding key. |
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*/ |
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module.exports = exports['default']; |
