JS
(quick guide & examples)
PUSH - ADD TO END OF ARRAY var arr = ["First", "Second"]; arr.push("Third");
First, Second, Third console.table(thearray);
UNSHIFT - ADD TO START OF ARRAY var arr = ["First", "Second"]; arr.unshift("Third");
Third, First, Second console.table(arr);
ASSIGN TO END OF ARRAY var arr = ["First", "Second"]; arr[arr.length] = "Third";
First, Second, Third console.table(arr);
CONCAT - JOIN 2 ARRAYS var arrA = ["First", "Second"]; var arrB = ["Third", "Forth"]; var combined = arrA.concat(arrB);
First, Second, Third, Forth console.table(combined);
SPLICE INSERT var arr = ["First", "Second", "Third"]; arr.splice(1, 0, "INSERTED");
First, INSERTED, Second, Third console.table(arr);