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- 'use strict';
- var GetIntrinsic = require('get-intrinsic');
- var $TypeError = GetIntrinsic('%TypeError%');
- var isPrefixOf = require('../helpers/isPrefixOf');
- // var callBound = require('call-bind/callBound');
- // var $charAt = callBound('String.prototype.charAt');
- var Type = require('./Type');
- // https://262.ecma-international.org/9.0/#sec-isstringprefix
- module.exports = function IsStringPrefix(p, q) {
- if (Type(p) !== 'String') {
- throw new $TypeError('Assertion failed: "p" must be a String');
- }
- if (Type(q) !== 'String') {
- throw new $TypeError('Assertion failed: "q" must be a String');
- }
- return isPrefixOf(p, q);
- /*
- if (p === q || p === '') {
- return true;
- }
- var pLength = p.length;
- var qLength = q.length;
- if (pLength >= qLength) {
- return false;
- }
- // assert: pLength < qLength
- for (var i = 0; i < pLength; i += 1) {
- if ($charAt(p, i) !== $charAt(q, i)) {
- return false;
- }
- }
- return true;
- */
- };
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