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The Interactive Extensions for JavaScript
23 lines (21 loc) • 868 B
JavaScript
/**
* Determines whether any element of an iterable sequence satisfies a condition.
*
* @template T The type of the elements in the source sequence.
* @param {Iterable<T>} source An iterable sequence whose elements to apply the predicate to.
* @param {FindSubclassedOptions<T, S>} options The options which includes a required predicate, an optional
* thisArg for binding, and an abort signal for cancellation.
* @returns {boolean} Returns a boolean determining whether any elements in the source sequence
* pass the test in the specified predicate.
*/
export function some(source, options) {
const { ['thisArg']: thisArg, ['predicate']: predicate } = options;
let i = 0;
for (const item of source) {
if (predicate.call(thisArg, item, i++)) {
return true;
}
}
return false;
}
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