40 lines
1.9 KiB
JavaScript
40 lines
1.9 KiB
JavaScript
const require_toInteger = require("../util/toInteger.js");
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const require_identity = require("../../function/identity.js");
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const require_iteratee = require("../util/iteratee.js");
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//#region src/compat/array/findLast.ts
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/**
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* Finds the last item in an object that has a specific property, where the property name is provided as a PropertyKey.
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*
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* @template T
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* @param {ArrayLike<T> | Record<any, any> | null | undefined} source - The source array or object to search through.
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* @param {((item: T, index: number, arr: any) => unknown) | Partial<T> | [keyof T, unknown] | PropertyKey} doesMatch - The criteria to match. It can be a function, a partial object, a key-value pair, or a property name.
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* @param {number} [fromIndex] - The index to start the search from, defaults to source.length-1 for arrays or Object.keys(source).length-1 for objects.
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* @returns {T | undefined} - The last property value that has the specified property, or `undefined` if no match is found.
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*
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* @example
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* // Using a property name
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* const obj = { a: { id: 1, name: 'Alice' }, b: { id: 2 }, c: { id: 3, name: 'Bob' } };
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* const result = findLast(obj, 'name');
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* console.log(result); // { id: 3, name: 'Bob' }
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*/
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function findLast(source, _doesMatch = require_identity.identity, fromIndex) {
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if (!source) return;
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const length = Array.isArray(source) ? source.length : Object.keys(source).length;
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fromIndex = require_toInteger.toInteger(fromIndex ?? length - 1);
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if (fromIndex < 0) fromIndex = Math.max(length + fromIndex, 0);
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else fromIndex = Math.min(fromIndex, length - 1);
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const doesMatch = require_iteratee.iteratee(_doesMatch);
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if (!Array.isArray(source)) {
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const keys = Object.keys(source);
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for (let i = fromIndex; i >= 0; i--) {
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const key = keys[i];
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const value = source[key];
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if (doesMatch(value, key, source)) return value;
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}
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return;
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}
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return source.slice(0, fromIndex + 1).findLast(doesMatch);
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}
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//#endregion
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exports.findLast = findLast;
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