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- 'use strict';
- var GetIntrinsic = require('get-intrinsic');
- var callBound = require('call-bind/callBound');
- var $fromCharCode = GetIntrinsic('%String.fromCharCode%');
- var $TypeError = GetIntrinsic('%TypeError%');
- var $charCodeAt = callBound('%String.prototype.charCodeAt%');
- var $push = callBound('%Array.prototype.push%');
- module.exports = function CharacterRange(A, B) {
- if (A.length !== 1 || B.length !== 1) {
- throw new $TypeError('Assertion failed: CharSets A and B contain exactly one character');
- }
- var a = A[0];
- var b = B[0];
- var i = $charCodeAt(a, 0);
- var j = $charCodeAt(b, 0);
- if (!(i <= j)) {
- throw new $TypeError('Assertion failed: i is not <= j');
- }
- var arr = [];
- for (var k = i; k <= j; k += 1) {
- $push(arr, $fromCharCode(k));
- }
- return arr;
- };
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