diff options
Diffstat (limited to 'node_modules/async/doWhilst.js')
-rw-r--r-- | node_modules/async/doWhilst.js | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/node_modules/async/doWhilst.js b/node_modules/async/doWhilst.js new file mode 100644 index 000000000..a683bb6ec --- /dev/null +++ b/node_modules/async/doWhilst.js @@ -0,0 +1,54 @@ +'use strict'; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.default = doWhilst; + +var _noop = require('lodash/noop'); + +var _noop2 = _interopRequireDefault(_noop); + +var _rest = require('lodash/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 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'];
\ No newline at end of file |