[downtowncanada]

if(typeof i[p] === typeof 3){//it's an int

  sum += i[p];

}else if(typeof i[p] === typeof [3]){//it's an array

  recursion(i[p]);

}

pretty simple no?

[cs02rm0]

That would've been simpler, but I seemed to get away with typeof(i[p]) === "object" and typeof(i[p]) === 1*typeof(i[p]) to test if it was an int.

I dread to think what obscure code I've left behind.

[chrisrhoden]

no, in this case the first will match on all numbers and the second will match on all objects.

You should learn a little more about JS before you call this simple.