122 lines
3.7 KiB
JavaScript
122 lines
3.7 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _createTester = require('./internal/createTester.js');
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var _createTester2 = _interopRequireDefault(_createTester);
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var _eachOf = require('./eachOf.js');
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var _eachOf2 = _interopRequireDefault(_eachOf);
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var _awaitify = require('./internal/awaitify.js');
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var _awaitify2 = _interopRequireDefault(_awaitify);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* Returns `true` if at least one element in the `coll` satisfies an async test.
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* If any iteratee call returns `true`, the main `callback` is immediately
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* called.
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*
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* @name some
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* @static
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* @memberOf module:Collections
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* @method
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* @alias any
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* @category Collection
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* @param {Array|Iterable|AsyncIterable|Object} coll - A collection to iterate over.
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* @param {AsyncFunction} iteratee - An async truth test to apply to each item
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* in the collections in parallel.
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* The iteratee should complete with a boolean `result` value.
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* Invoked with (item, callback).
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* @param {Function} [callback] - A callback which is called as soon as any
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* iteratee returns `true`, or after all the iteratee functions have finished.
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* Result will be either `true` or `false` depending on the values of the async
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* tests. Invoked with (err, result).
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* @returns {Promise} a promise, if no callback provided
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* @example
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*
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* // dir1 is a directory that contains file1.txt, file2.txt
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* // dir2 is a directory that contains file3.txt, file4.txt
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* // dir3 is a directory that contains file5.txt
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* // dir4 does not exist
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*
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* // asynchronous function that checks if a file exists
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* function fileExists(file, callback) {
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* fs.access(file, fs.constants.F_OK, (err) => {
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* callback(null, !err);
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* });
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* }
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*
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* // Using callbacks
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* async.some(['dir1/missing.txt','dir2/missing.txt','dir3/file5.txt'], fileExists,
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* function(err, result) {
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* console.log(result);
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* // true
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* // result is true since some file in the list exists
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* }
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*);
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*
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* async.some(['dir1/missing.txt','dir2/missing.txt','dir4/missing.txt'], fileExists,
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* function(err, result) {
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* console.log(result);
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* // false
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* // result is false since none of the files exists
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* }
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*);
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*
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* // Using Promises
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* async.some(['dir1/missing.txt','dir2/missing.txt','dir3/file5.txt'], fileExists)
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* .then( result => {
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* console.log(result);
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* // true
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* // result is true since some file in the list exists
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* }).catch( err => {
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* console.log(err);
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* });
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*
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* async.some(['dir1/missing.txt','dir2/missing.txt','dir4/missing.txt'], fileExists)
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* .then( result => {
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* console.log(result);
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* // false
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* // result is false since none of the files exists
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* }).catch( err => {
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* console.log(err);
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* });
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*
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* // Using async/await
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* async () => {
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* try {
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* let result = await async.some(['dir1/missing.txt','dir2/missing.txt','dir3/file5.txt'], fileExists);
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* console.log(result);
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* // true
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* // result is true since some file in the list exists
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* }
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* catch (err) {
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* console.log(err);
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* }
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* }
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*
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* async () => {
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* try {
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* let result = await async.some(['dir1/missing.txt','dir2/missing.txt','dir4/missing.txt'], fileExists);
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* console.log(result);
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* // false
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* // result is false since none of the files exists
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* }
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* catch (err) {
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* console.log(err);
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* }
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* }
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*
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*/
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function some(coll, iteratee, callback) {
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return (0, _createTester2.default)(Boolean, res => res)(_eachOf2.default, coll, iteratee, callback);
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}
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exports.default = (0, _awaitify2.default)(some, 3);
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module.exports = exports.default; |