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

return this[x] || null || 'aïe' || 12 || undefined will not return one of those. It is supposed to return the result of the expression this[x] || null || 'aïe' || 12 || undefined - I believe it will return a boolean value.