38 lines
1.6 KiB
JavaScript
38 lines
1.6 KiB
JavaScript
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import { windowed } from "../../array/windowed.mjs";
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import { isArrayLikeObject } from "../predicate/isArrayLikeObject.mjs";
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import { last } from "./last.mjs";
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import { differenceWith } from "./differenceWith.mjs";
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import { intersectionWith } from "./intersectionWith.mjs";
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import { unionWith } from "./unionWith.mjs";
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//#region src/compat/array/xorWith.ts
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/**
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* Creates an array of unique values that is the symmetric difference of the given arrays using a custom comparator function.
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*
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* The symmetric difference is the set of elements which are in either of the arrays,
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* but not in their intersection, determined by the comparator function.
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*
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* @template T - Type of elements in the input arrays.
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*
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* @param {...(ArrayLike<T> | null | undefined | ((a: T, b: T) => boolean))} values - The arrays to inspect, or the comparator function.
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* @returns {T[]} An array containing the elements that are present in exactly one of the arrays
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* as determined by the comparator.
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*
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* @example
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* // Custom comparator function for objects with an 'id' property
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* const idComparator = (a, b) => a.id === b.id;
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* xorWith([{ id: 1 }, { id: 2 }], [{ id: 2 }, { id: 3 }], idComparator);
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* // Returns [{ id: 1 }, { id: 3 }]
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*/
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function xorWith(...values) {
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const lastValue = last(values);
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let comparator = (a, b) => a === b;
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if (typeof lastValue === "function") {
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comparator = lastValue;
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values = values.slice(0, -1);
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}
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const arrays = values.filter(isArrayLikeObject);
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return differenceWith(unionWith(...arrays, comparator), unionWith(...windowed(arrays, 2).map(([arr1, arr2]) => intersectionWith(arr1, arr2, comparator)), comparator), comparator);
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}
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//#endregion
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export { xorWith };
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