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41 lines
1.5 KiB
JavaScript
41 lines
1.5 KiB
JavaScript
5 years ago
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = reduceRight;
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var _reduce = require('./reduce');
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var _reduce2 = _interopRequireDefault(_reduce);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* Same as [`reduce`]{@link module:Collections.reduce}, only operates on `array` in reverse order.
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*
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* @name reduceRight
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* @static
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* @memberOf module:Collections
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* @method
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* @see [async.reduce]{@link module:Collections.reduce}
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* @alias foldr
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* @category Collection
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* @param {Array} array - A collection to iterate over.
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* @param {*} memo - The initial state of the reduction.
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* @param {AsyncFunction} iteratee - A function applied to each item in the
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* array to produce the next step in the reduction.
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* The `iteratee` should complete with the next state of the reduction.
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* If the iteratee complete with an error, the reduction is stopped and the
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* main `callback` is immediately called with the error.
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* Invoked with (memo, item, callback).
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* @param {Function} [callback] - A callback which is called after all the
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* `iteratee` functions have finished. Result is the reduced value. Invoked with
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* (err, result).
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* @returns {Promise} a promise, if no callback is passed
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*/
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function reduceRight(array, memo, iteratee, callback) {
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var reversed = [...array].reverse();
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return (0, _reduce2.default)(reversed, memo, iteratee, callback);
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}
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module.exports = exports['default'];
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