source: imaps-frontend/node_modules/es-abstract/2023/FindViaPredicate.js@ 79a0317

'use strict';

var $TypeError = require('es-errors/type');
var isInteger = require('math-intrinsics/isInteger');

var Call = require('./Call');
var Get = require('./Get');
var ToBoolean = require('./ToBoolean');
var IsCallable = require('./IsCallable');
var ToString = require('./ToString');

var isObject = require('../helpers/isObject');

// https://262.ecma-international.org/14.0/#sec-findviapredicate

module.exports = function FindViaPredicate(O, len, direction, predicate, thisArg) {
        if (!isObject(O)) {
                throw new $TypeError('Assertion failed: Type(O) is not Object');
        }
        if (!isInteger(len) || len < 0) {
                throw new $TypeError('Assertion failed: len must be a non-negative integer');
        }
        if (direction !== 'ascending' && direction !== 'descending') {
                throw new $TypeError('Assertion failed: direction must be "ascending" or "descending"');
        }

        if (!IsCallable(predicate)) {
                throw new $TypeError('predicate must be callable'); // step 1
        }

        for ( // steps 2-4
                var k = direction === 'ascending' ? 0 : len - 1;
                direction === 'ascending' ? k < len : k >= 0;
                k += 1
        ) {
                var Pk = ToString(k); // step 4.a
                var kValue = Get(O, Pk); // step 4.c
                var testResult = Call(predicate, thisArg, [kValue, k, O]); // step 4.d
                if (ToBoolean(testResult)) {
                        return { '[[Index]]': k, '[[Value]]': kValue }; // step 4.e
                }
        }
        return { '[[Index]]': -1, '[[Value]]': void undefined }; // step 5
};