Does this work?

Oh!The reduce() can be used like this...

So clever!

WTF?

Amazing!

Compare with my solution.hahaha!

How it works?

Fuck kata,it's difficult.And when I have solved this kata and pass the tests,there is no submit button.OMG!

remove this digit at that index and insert it back to another place in the number... I had also minsunderstood.I think that just replacing is enough.

WTF?

Are you sure?

It's difficult for me and takes me whole day to work out...But your solution is simple.

Nice job!

Or you can change it like this :

    let converter = {
      toAscii(hex){
        //...
      },  
      toHex(ascii){
        //...
      }
    }

Your Tamplate seems like a constructor,but you use it like an Object...