#32
Duplicate a Sequence
| Difficulty: | Easy |
| Topics: | seqs |
Write a function which
duplicates each element of a sequence.
 | (= (__ [1 2 3]) '(1 1 2 2 3 3)) |
| (= (__ [:a :a :b :b]) '(:a :a :a :a :b :b :b :b)) |
| (= (__ [[1 2] [3 4]]) '([1 2] [1 2] [3 4] [3 4])) |
| (= (__ [44 33]) [44 44 33 33]) |