31 lines
1.1 KiB
JavaScript
31 lines
1.1 KiB
JavaScript
import { intersection as intersection$1 } from "../../array/intersection.mjs";
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import { combineEagerAndLazyFunctions, createLazyFunction } from "../_internal/lazy.mjs";
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//#region src/fp/array/intersection.ts
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/**
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* Creates a function that keeps values from the piped array that are also present in another array.
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*
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* Equality follows SameValueZero through Set membership, matching the main
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* {@link intersection} implementation. The returned function is lazy-capable
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* inside {@link pipe}.
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*
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* @template T - The type of elements in the arrays.
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* @param secondArray - Values to intersect with the piped array.
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* @returns A function that maps the piped array to its intersection.
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*
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* @example
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* import { intersection, pipe } from 'es-toolkit/fp';
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*
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* pipe([1, 2, 3], intersection([2, 4]));
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* // => [2]
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*/
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function intersection(secondArray) {
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const secondSet = new Set(secondArray);
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function intersectionEager(array) {
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return intersection$1(array, secondArray);
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}
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return combineEagerAndLazyFunctions(intersectionEager, createLazyFunction((value, _index, emit) => {
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if (secondSet.has(value)) emit(value);
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}));
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}
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//#endregion
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export { intersection };
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