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implementation.js
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implementation.js
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'use strict';
var Get = require('es-abstract/2024/Get');
var LengthOfArrayLike = require('es-abstract/2024/LengthOfArrayLike');
var ToObject = require('es-object-atoms/ToObject');
var ToString = require('es-abstract/2024/ToString');
var callBound = require('call-bind/callBound');
var isString = require('is-string');
// Check failure of by-index access of string characters (IE < 9) and failure of `0 in boxedString` (Rhino)
var boxedString = Object('a');
var splitString = boxedString[0] !== 'a' || !(0 in boxedString);
var strSplit = callBound('String.prototype.split');
module.exports = function join(separator) {
var O = ToObject(this); // step 1
var self = splitString && isString(O) ? strSplit(O, '') : O;
var len = LengthOfArrayLike(self); // step 2
var sep = typeof separator === 'undefined' ? ',' : ToString(separator); // steps 3-4
var R = ''; // step 5
var k = 0; // step 6
while (k < len) { // step 7
if (k > 0) {
R += sep; // step 7.a
}
var element = Get(O, ToString(k)); // step 7.b
// eslint-disable-next-line eqeqeq
var next = element == null ? '' : ToString(element); // step 7.c
R += next; // step 7.d
k += 1; // step 7.e
}
return R; // step 8
};
module.exports.prototype = undefined;