Remove all duplicates in array.

Question

remove all duplicate numbers in an array
test input: {1,2,2,3,3,3,4,4,4,4,5,5,5,5,5}
output: 12345

Answer 1

https://www.google.pl/url?sa=t&source=web&rct=j&url=https://stackoverflow.com/questions/17967114/how-to-efficiently-remove-duplicates-from-an-array-without-using-set&ved=0ahUKEwiJz8mLtJnXAhXI0xoKHRCABK0QjjgIJTAA&usg=AOvVaw3tRAYpdTQ7jSY4lRUch-2p

Answer 2

Insert all into a Set and then convert into an array!