5 Brains, not 4

[danninemx]

AboutObjects.js line 32 has an expected answer of "They are Pinky and the Brain Brain Brain Brain" -- with 4 iterations of the string "Brain".

The actual pseudo code is:

var megalomaniac = {
  mastermind : "Brain",
  henchman: "Pinky",
  battleCry: function (noOfBrains) {
    return "They are " + this.henchman + " and the" +
      Array(noOfBrains + 1).join(" " + this.mastermind);
  }
};

The problem in question was:

var battleCry = megalomaniac.battleCry(4);

If we indeed pass 4 as noOfBrains, since the method adds 1 to noOfBrains before joining them, would the result not have 5 "Brain"?

[endrin]

No. Actually, Array(noOfBrains + 1) creates 5-element array of undefined which is then joined together with " Brain". As there are five elements there will be four joins.

[danninemx]

That makes sense. Thank you.