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'use strict'; Object.defineProperty(exports, "__esModule", { value: true }); exports.default = tryEach; var _noop = require('lodash/noop'); var _noop2 = _interopRequireDefault(_noop); var _eachSeries = require('./eachSeries'); var _eachSeries2 = _interopRequireDefault(_eachSeries); var _wrapAsync = require('./internal/wrapAsync'); var _wrapAsync2 = _interopRequireDefault(_wrapAsync); var _slice = require('./internal/slice'); var _slice2 = _interopRequireDefault(_slice); function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } /** * It runs each task in series but stops whenever any of the functions were * successful. If one of the tasks were successful, the `callback` will be * passed the result of the successful task. If all tasks fail, the callback * will be passed the error and result (if any) of the final attempt. * * @name tryEach * @static * @memberOf module:ControlFlow * @method * @category Control Flow * @param {Array|Iterable|Object} tasks - A collection containing functions to * run, each function is passed a `callback(err, result)` it must call on * completion with an error `err` (which can be `null`) and an optional `result` * value. * @param {Function} [callback] - An optional callback which is called when one * of the tasks has succeeded, or all have failed. It receives the `err` and * `result` arguments of the last attempt at completing the `task`. Invoked with * (err, results). * @example * async.tryEach([ * function getDataFromFirstWebsite(callback) { * // Try getting the data from the first website * callback(err, data); * }, * function getDataFromSecondWebsite(callback) { * // First website failed, * // Try getting the data from the backup website * callback(err, data); * } * ], * // optional callback * function(err, results) { * Now do something with the data. * }); * */ function tryEach(tasks, callback) { var error = null; var result; callback = callback || _noop2.default; (0, _eachSeries2.default)(tasks, function (task, callback) { (0, _wrapAsync2.default)(task)(function (err, res /*, ...args*/) { if (arguments.length > 2) { result = (0, _slice2.default)(arguments, 1); } else { result = res; } error = err; callback(!err); }); }, function () { callback(error, result); }); } module.exports = exports['default'];