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122 lines
3.7 KiB
122 lines
3.7 KiB
'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']; |