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<h1 class="page-title">some.js</h1>
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<pre class="prettyprint source linenums"><code>import createTester from './internal/createTester.js'
import eachOf from './eachOf.js'
import awaitify from './internal/awaitify.js'
/**
* Returns `true` if at least one element in the `coll` satisfies an async test.
* If any iteratee call returns `true`, the main `callback` is immediately
* called.
*
* @name some
* @static
* @memberOf module:Collections
* @method
* @alias any
* @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 collections in parallel.
* The iteratee should complete with a boolean `result` value.
* Invoked with (item, callback).
* @param {Function} [callback] - A callback which is called as soon as any
* iteratee returns `true`, or 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
*
* // 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.some(['dir1/missing.txt','dir2/missing.txt','dir3/file5.txt'], fileExists,
* function(err, result) {
* console.log(result);
* // true
* // result is true since some file in the list exists
* }
*);
*
* async.some(['dir1/missing.txt','dir2/missing.txt','dir4/missing.txt'], fileExists,
* function(err, result) {
* console.log(result);
* // false
* // result is false since none of the files exists
* }
*);
*
* // Using Promises
* async.some(['dir1/missing.txt','dir2/missing.txt','dir3/file5.txt'], fileExists)
* .then( result => {
* console.log(result);
* // true
* // result is true since some file in the list exists
* }).catch( err => {
* console.log(err);
* });
*
* async.some(['dir1/missing.txt','dir2/missing.txt','dir4/missing.txt'], fileExists)
* .then( result => {
* console.log(result);
* // false
* // result is false since none of the files exists
* }).catch( err => {
* console.log(err);
* });
*
* // Using async/await
* async () => {
* try {
* let result = await async.some(['dir1/missing.txt','dir2/missing.txt','dir3/file5.txt'], fileExists);
* console.log(result);
* // true
* // result is true since some file in the list exists
* }
* catch (err) {
* console.log(err);
* }
* }
*
* async () => {
* try {
* let result = await async.some(['dir1/missing.txt','dir2/missing.txt','dir4/missing.txt'], fileExists);
* console.log(result);
* // false
* // result is false since none of the files exists
* }
* catch (err) {
* console.log(err);
* }
* }
*
*/
function some(coll, iteratee, callback) {
return createTester(Boolean, res => res)(eachOf, coll, iteratee, callback)
}
export default awaitify(some, 3);
</code></pre>
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<h3>Methods:</h3><ul class="nav methods"><li class="toc-header"><a href="docs.html#collections">Collections</a></li><li data-type="method" class="toc-method"><a href="docs.html#concat">concat</a></li><li data-type="method" class="toc-method"><a href="docs.html#concatLimit">concatLimit</a></li><li data-type="method" class="toc-method"><a href="docs.html#concatSeries">concatSeries</a></li><li data-type="method" class="toc-method"><a href="docs.html#detect">detect</a></li><li data-type="method" class="toc-method"><a href="docs.html#detectLimit">detectLimit</a></li><li data-type="method" class="toc-method"><a href="docs.html#detectSeries">detectSeries</a></li><li data-type="method" class="toc-method"><a href="docs.html#each">each</a></li><li data-type="method" class="toc-method"><a href="docs.html#eachLimit">eachLimit</a></li><li data-type="method" class="toc-method"><a href="docs.html#eachOf">eachOf</a></li><li data-type="method" class="toc-method"><a href="docs.html#eachOfLimit">eachOfLimit</a></li><li data-type="method" class="toc-method"><a href="docs.html#eachOfSeries">eachOfSeries</a></li><li data-type="method" class="toc-method"><a href="docs.html#eachSeries">eachSeries</a></li><li data-type="method" class="toc-method"><a href="docs.html#every">every</a></li><li data-type="method" class="toc-method"><a href="docs.html#everyLimit">everyLimit</a></li><li data-type="method" class="toc-method"><a href="docs.html#everySeries">everySeries</a></li><li data-type="method" class="toc-method"><a href="docs.html#filter">filter</a></li><li data-type="method" class="toc-method"><a href="docs.html#filterLimit">filterLimit</a></li><li data-type="method" class="toc-method"><a href="docs.html#filterSeries">filterSeries</a></li><li data-type="method" class="toc-method"><a href="docs.html#groupBy">groupBy</a></li><li data-type="method" class="toc-method"><a href="docs.html#groupByLimit">groupByLimit</a></li><li data-type="method" 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