35 lines
1.1 KiB
JavaScript
35 lines
1.1 KiB
JavaScript
import { uniqWith as uniqWith$1 } from "../../array/uniqWith.mjs";
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import { combineEagerAndLazyFunctions } from "../_internal/lazy.mjs";
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//#region src/fp/array/uniqWith.ts
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/**
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* Creates a function that removes duplicate values using a custom equality function.
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*
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* The first value in each equality group is preserved. The returned function is
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* lazy-capable inside {@link pipe}.
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*
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* @template T - The type of elements in the array.
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* @param areItemsEqual - Returns true when two values should be treated as equal.
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* @returns A function that maps the piped array to unique values.
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*
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* @example
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* import { pipe, uniqWith } from 'es-toolkit/fp';
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*
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* pipe([{ id: 1 }, { id: 1 }, { id: 2 }], uniqWith((a, b) => a.id === b.id));
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* // => [{ id: 1 }, { id: 2 }]
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*/
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function uniqWith(areItemsEqual) {
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function uniqWithEager(array) {
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return uniqWith$1(array, areItemsEqual);
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}
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const uniqWithLazy = (emit) => {
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const seen = [];
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return (value) => {
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if (seen.some((item) => areItemsEqual(item, value))) return true;
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seen.push(value);
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return emit(value);
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};
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};
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return combineEagerAndLazyFunctions(uniqWithEager, uniqWithLazy);
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}
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//#endregion
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export { uniqWith };
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