27 lines
1,022 B
JavaScript
27 lines
1,022 B
JavaScript
const require_unionBy = require("../../array/unionBy.js");
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//#region src/fp/array/unionBy.ts
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/**
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* Creates a function that returns unique values by mapped identity.
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*
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* Values from the piped array are considered before values from secondArray. The mapper
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* is used to compare identities, matching the main {@link unionBy} behavior.
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*
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* @template T - The type of elements in the arrays.
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* @template U - The type of comparison keys returned by the mapper.
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* @param secondArray - Values to include after the piped array.
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* @param mapper - Called for values from both arrays to produce comparison keys.
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* @returns A function that maps a readonly array to its union with secondArray.
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*
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* @example
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* import { pipe, unionBy } from 'es-toolkit/fp';
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*
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* pipe([{ id: 1 }], unionBy([{ id: 1 }, { id: 2 }], item => item.id));
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* // => [{ id: 1 }, { id: 2 }]
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*/
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function unionBy(secondArray, mapper) {
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return function(array) {
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return require_unionBy.unionBy(array, secondArray, mapper);
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};
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}
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//#endregion
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exports.unionBy = unionBy;
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