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

from JavaScript https://ift.tt/2QFqzg2
via IFTTT