javascript access key value pair from a string

Question

In the following string how can i access the elements For ex:

var s= "{4:123,5:456}" 
for(var i=0;i<s.split(",").length;i++)
{
        console.log(s[i][0]) // should give me 4,5
        console.log(s[i][1]) // should give me 123,456

}

Answer 1

I think the code should be like:

   var s= {4:123,5:456} 
   for(var entry in s)
   {
        console.log(entry); // should give me 4,5
        console.log(s[entry]); // should give me 123,456
   }