Question

Can anybody help me in formatting the below string to display the final result as “Mark, Anthony” i have been using substring in javascript to format and do we have anything like subsequence to make these format in a single line code?

var res="undefinedMark, Anthony," 
var final = res.substring(9, res.length); // removes undefined
var finalOP = final.substring(0, final.length - 9); // removes the final ,

thanks

Answer 1

You could use the String.replace method:

var final = res.replace(/undefined/,'') //=>replace undefined with ''
               .replace(/,$/,'');       //=>replace the last ','