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- 'use strict';
- var GetIntrinsic = require('get-intrinsic');
- var $TypeError = GetIntrinsic('%TypeError%');
- var Call = require('./Call');
- var IsLessThan = require('./IsLessThan');
- var ToNumber = require('./ToNumber');
- var ToString = require('./ToString');
- var isNaN = require('../helpers/isNaN');
- module.exports = function CompareArrayElements(x, y, compareFn) {
- if (typeof compareFn !== 'function' && typeof compareFn !== 'undefined') {
- throw new $TypeError('Assertion failed: `compareFn` must be a function or undefined');
- }
- if (typeof x === 'undefined' && typeof y === 'undefined') {
- return 0;
- }
- if (typeof x === 'undefined') {
- return 1;
- }
- if (typeof y === 'undefined') {
- return -1;
- }
- if (typeof compareFn !== 'undefined') {
- var v = ToNumber(Call(compareFn, void undefined, [x, y]));
- if (isNaN(v)) {
- return 0;
- }
- return v;
- }
- var xString = ToString(x);
- var yString = ToString(y);
- var xSmaller = IsLessThan(xString, yString, true);
- if (xSmaller) {
- return -1;
- }
- var ySmaller = IsLessThan(yString, xString, true);
- if (ySmaller) {
- return 1;
- }
- return 0;
- };
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