1 2 3 4 5 6 7 8
test Test: let list1 = [ 1 ] let list2 = [ 2, 3 ] let empty = [ ] let c1 = concat [[ 1 ]] let c2 = concat [[ 1 ], [], empty] let c3 = concat [ list1, list2, [ 6, 5 ], list2 ]