2TUCK
Copy the top pair of items below the second pair of items.
Input stack: a b c d
Output stack: c d a b c d
PumpkinDB> 1 2 3 4 2TUCK
3 4 1 2 3 4
Allocation
None
Errors
EmptyStack error if there are less than four items on the stack
Tests
works : 1 2 3 4 2TUCK STACK [3 4 1 2 3 4] EQUAL?.
empty_stack : [2TUCK] TRY UNWRAP 0x04 EQUAL?.
empty_stack_1 : [1 2TUCK] TRY UNWRAP 0x04 EQUAL?.
empty_stack_2 : [1 2 2TUCK] TRY UNWRAP 0x04 EQUAL?.
empty_stack_3 : [1 2 3 2TUCK] TRY UNWRAP 0x04 EQUAL?.