5.3 My Unshift created by smillaraaq - https://repl.it/HET3/2

5.3 My Unshift.js

function myUnshift (arr,num) {
    arr.splice(0,0,num);
    return arr;
}

console.log(myUnshift([1,3,4],2));

function myUnshift (arr,num) {
    var tempArray=[num];
    for(var i=tempArray.length;i<=arr.length;i++){
        tempArray[i]=arr[i-1];
    }
    return arr = tempArray;
}

console.log(myUnshift([1,3,4],2));