Given the following user agent string ua and function expression r,

var ua = "Mozilla/5.0 (Android; Mobile; rv:31.0) Gecko/31.0 Firefox/31.0"

r = function (e) {
  if (e.indexOf('android') !== - 1) {
    var t = /android (\d)/gi,
    n = parseInt(t.exec(e)[1], 10);
    return !isNaN(n) && n >= 4
  }
  return !1
}

What’s the value of parseInt(t.exec(e)[1], 10)?

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Trick question. You get a TypeError because the [1]th index of null doesn’t̗̦͇̮͕̾ ̝̠̥̩̞͙̣ͤ̑ͧ̏ͥe̹͉̘̯̎͒̃x̤͑̿i̬ͮ͑̇̎̉s͉̝̩̲̹͒́t̻͍̻̯̗̅ͅ.̩ͧͯ̆̑̇̒

So what do you win for taking this quiz?

If you happen to work for Comedy Central, your prize is now you know why you have a bug!

If you don’t, you can follow this link to entertain yourself with similar bloopers in the wild.