30 lines
796 B
JavaScript
30 lines
796 B
JavaScript
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'use strict';
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module.exports = asyncForEach;
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/**
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* Simultaneously processes all items in the given array.
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*
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* @param {array} array - The array to iterate over
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* @param {function} iterator - The function to call for each item in the array
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* @param {function} done - The function to call when all iterators have completed
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*/
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function asyncForEach (array, iterator, done) {
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if (array.length === 0) {
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// NOTE: Normally a bad idea to mix sync and async, but it's safe here because
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// of the way that this method is currently used by DirectoryReader.
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done();
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return;
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}
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// Simultaneously process all items in the array.
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let pending = array.length;
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array.forEach(item => {
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iterator(item, () => {
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if (--pending === 0) {
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done();
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}
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});
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});
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}
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