| 'use strict'; |
| |
| Object.defineProperty(exports, "__esModule", { |
| value: true |
| }); |
| exports.default = doWhilst; |
| |
| var _noop = require('lodash/noop'); |
| |
| var _noop2 = _interopRequireDefault(_noop); |
| |
| var _rest = require('./internal/rest'); |
| |
| var _rest2 = _interopRequireDefault(_rest); |
| |
| var _onlyOnce = require('./internal/onlyOnce'); |
| |
| var _onlyOnce2 = _interopRequireDefault(_onlyOnce); |
| |
| function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
| |
| /** |
| * The post-check version of [`whilst`]{@link module:ControlFlow.whilst}. To reflect the difference in |
| * the order of operations, the arguments `test` and `iteratee` are switched. |
| * |
| * `doWhilst` is to `whilst` as `do while` is to `while` in plain JavaScript. |
| * |
| * @name doWhilst |
| * @static |
| * @memberOf module:ControlFlow |
| * @method |
| * @see [async.whilst]{@link module:ControlFlow.whilst} |
| * @category Control Flow |
| * @param {Function} iteratee - A function which is called each time `test` |
| * passes. The function is passed a `callback(err)`, which must be called once |
| * it has completed with an optional `err` argument. Invoked with (callback). |
| * @param {Function} test - synchronous truth test to perform after each |
| * execution of `iteratee`. Invoked with the non-error callback results of |
| * `iteratee`. |
| * @param {Function} [callback] - A callback which is called after the test |
| * function has failed and repeated execution of `iteratee` has stopped. |
| * `callback` will be passed an error and any arguments passed to the final |
| * `iteratee`'s callback. Invoked with (err, [results]); |
| */ |
| function doWhilst(iteratee, test, callback) { |
| callback = (0, _onlyOnce2.default)(callback || _noop2.default); |
| var next = (0, _rest2.default)(function (err, args) { |
| if (err) return callback(err); |
| if (test.apply(this, args)) return iteratee(next); |
| callback.apply(null, [null].concat(args)); |
| }); |
| iteratee(next); |
| } |
| module.exports = exports['default']; |