var strArr10 = ["a", "b" ,"ba","bcd","ab","abcd"]
strArr10.sort({(s1:String,s2:String)->Bool in
// if countElements(s1) != countElements(s2)
if s1.characters.count != s2.characters.count
{
return s1.characters.count < s2.characters.count
}
return s1 < s2
