JSFiddle - React, Tailwind, and code Playground

HTML

<div id="write"></div>

JavaScript

function reindex_array_keys(array, start){
    var temp = [];
    start = typeof start == 'undefined' ? 0 : start;
    start = typeof start != 'number' ? 0 : start;
    for(var i in array){
        temp[start++] = array[i];
    }
    return temp;
}



var testArray = new Array();
testArray[3]="qwerty";
testArray[7]="asdfgh";
testArray[13]="zxcvbn";

testArray = reindex_array_keys(testArray);

var testString = testArray.join();
var testid

$(function(){
    $('#write').text(testString);
});