to find the intersection of two arrays using only string functions. Given var x = [1,2,3,4,5,6,7,8]; and var y = [1,2,3,3,3,5]; Your function should return ["1" , "2" , "3" , "5"] Rules Use only in-built javascript string functions No loops / array iterator functions (e.g. filter, map, forEach, each, some e.t.c.) No external / 3rd party libraries