import createTester from './internal/createTester'; import eachOf from './eachOf' import awaitify from './internal/awaitify' /** * 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 * * async.every(['file1','file2','file3'], function(filePath, callback) { * fs.access(filePath, function(err) { * callback(null, !err) * }); * }, function(err, result) { * // if result is true then every file exists * }); */ function every(coll, iteratee, callback) { return createTester(bool => !bool, res => !res)(eachOf, coll, iteratee, callback) } export default awaitify(every, 3);