es-toolkit/dist/compat/array/findLast.js

A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.

'use strict';

Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });

const identity = require('../../function/identity.js');
const iteratee = require('../util/iteratee.js');
const toInteger = require('../util/toInteger.js');

function findLast(source, _doesMatch = identity.identity, fromIndex) {
    if (!source) {
        return undefined;
    }
    const length = Array.isArray(source) ? source.length : Object.keys(source).length;
    fromIndex = toInteger.toInteger(fromIndex ?? length - 1);
    if (fromIndex < 0) {
        fromIndex = Math.max(length + fromIndex, 0);
    }
    else {
        fromIndex = Math.min(fromIndex, length - 1);
    }
    const doesMatch = iteratee.iteratee(_doesMatch);
    if (!Array.isArray(source)) {
        const keys = Object.keys(source);
        for (let i = fromIndex; i >= 0; i--) {
            const key = keys[i];
            const value = source[key];
            if (doesMatch(value, key, source)) {
                return value;
            }
        }
        return undefined;
    }
    return source.slice(0, fromIndex + 1).findLast(doesMatch);
}

exports.findLast = findLast;