return String vs Integer vs undefined vs null

Question

Why does javascript prefers to return a String over any other choices ?

Consider the following snippet.

var arr = [\'Hello1\', \'Hello2\', \         


        

Answer 1

Because it is evaluating in order from left to right.

If you were to modify to this:

return this[x] || null || 12 || 'aïe' || undefined ;

Your answer would be 12.