diff options
Diffstat (limited to 'node_modules/async/every.js')
-rw-r--r-- | node_modules/async/every.js | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/node_modules/async/every.js b/node_modules/async/every.js new file mode 100644 index 0000000..148db68 --- /dev/null +++ b/node_modules/async/every.js @@ -0,0 +1,119 @@ +'use strict'; + +Object.defineProperty(exports, "__esModule", { + value: true +}); + +var _createTester = require('./internal/createTester.js'); + +var _createTester2 = _interopRequireDefault(_createTester); + +var _eachOf = require('./eachOf.js'); + +var _eachOf2 = _interopRequireDefault(_eachOf); + +var _awaitify = require('./internal/awaitify.js'); + +var _awaitify2 = _interopRequireDefault(_awaitify); + +function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +/** + * Returns `true` if every element in `coll` satisfies an async test. If any + * iteratee call returns `false`, the main `callback` is immediately called. + * + * @name every + * @static + * @memberOf module:Collections + * @method + * @alias all + * @category Collection + * @param {Array|Iterable|AsyncIterable|Object} coll - A collection to iterate over. + * @param {AsyncFunction} iteratee - An async truth test to apply to each item + * in the collection in parallel. + * The iteratee must complete with a boolean result value. + * Invoked with (item, callback). + * @param {Function} [callback] - A callback which is called after all the + * `iteratee` functions have finished. Result will be either `true` or `false` + * depending on the values of the async tests. Invoked with (err, result). + * @returns {Promise} a promise, if no callback provided + * @example + * + * // dir1 is a directory that contains file1.txt, file2.txt + * // dir2 is a directory that contains file3.txt, file4.txt + * // dir3 is a directory that contains file5.txt + * // dir4 does not exist + * + * const fileList = ['dir1/file1.txt','dir2/file3.txt','dir3/file5.txt']; + * const withMissingFileList = ['file1.txt','file2.txt','file4.txt']; + * + * // asynchronous function that checks if a file exists + * function fileExists(file, callback) { + * fs.access(file, fs.constants.F_OK, (err) => { + * callback(null, !err); + * }); + * } + * + * // Using callbacks + * async.every(fileList, fileExists, function(err, result) { + * console.log(result); + * // true + * // result is true since every file exists + * }); + * + * async.every(withMissingFileList, fileExists, function(err, result) { + * console.log(result); + * // false + * // result is false since NOT every file exists + * }); + * + * // Using Promises + * async.every(fileList, fileExists) + * .then( result => { + * console.log(result); + * // true + * // result is true since every file exists + * }).catch( err => { + * console.log(err); + * }); + * + * async.every(withMissingFileList, fileExists) + * .then( result => { + * console.log(result); + * // false + * // result is false since NOT every file exists + * }).catch( err => { + * console.log(err); + * }); + * + * // Using async/await + * async () => { + * try { + * let result = await async.every(fileList, fileExists); + * console.log(result); + * // true + * // result is true since every file exists + * } + * catch (err) { + * console.log(err); + * } + * } + * + * async () => { + * try { + * let result = await async.every(withMissingFileList, fileExists); + * console.log(result); + * // false + * // result is false since NOT every file exists + * } + * catch (err) { + * console.log(err); + * } + * } + * + */ +function every(coll, iteratee, callback) { + return (0, _createTester2.default)(bool => !bool, res => !res)(_eachOf2.default, coll, iteratee, callback); +} +exports.default = (0, _awaitify2.default)(every, 3); +module.exports = exports['default'];
\ No newline at end of file |