array input value how to replace decode value as Output using JavaScript code

Hi

I have dynamic input array variable value
Decode values
1-->Java
2-->HTML
3-->SQL
4-->PHP
5-->DOTNet
6-->JavaScript
7-->Oracle

input values
arrstrval =1,2,5,4,7

but my output should be like below
arrstrval =Java,HTML,DOTNet,PHP,Oracle

Can any one help me Please

 

const a = ['Java','HTML', 'SQL', 'PHP', 'DOTNet', 'Javascript', 'Oracle'];

const strval = [1,2,5,4,7];

let newarr = [];

for(i = 0; i < strval.length; i++) {
  newarr.push(a[strval[i]-1]);
}

console.log(newarr);

Code (JavaScript):

It will log your desired output.

By the way, I think the better way to do this is with objects.

const obj = { id: 1, name: 'Java' }

Code (JavaScript):

 

Thanks for your assistance and Thanks a Lot