JSFiddle - React, Tailwind, and code Playground

by TheMadDeveloper

HTML

<div id="Output"></div>

JavaScript

Array.prototype.spliceArray = function(index, n, array) {
    return Array.prototype.splice.apply(this, [index, n].concat(array));
}

var letter_array = ["A", "B", "C", "D", "E", "F"],
    number_array = ["1", "2", "3"];

$("#Output").append("<code>letter_array</code>: " + JSON.stringify(letter_array) + "<br />"); // output: A, B, C, D, E, F
$("#Output").append("<code>number_array</code>: " + JSON.stringify(number_array) + "<br />"); // output: 1, 2, 3

letter_array.spliceArray(3,3,number_array);
$("#Output").append("after <code>letter_array.spliceArray(3,3,number_array)</code>: " + JSON.stringify(letter_array) + "<br />"); // output: A, B, C, 1, 2, 3