-rot |
( n1 n2 n3 -- n3 n1 n2 ) |
Inversely rotate three stack items. |
>r |
( n -- ) |
Move a stack item to the return stack. |
?dup |
( n -- n n | 0 ) |
Duplicate the top stack item if non-zero. |
2drop |
( n1 n2 -- ) |
Remove top two items from the stack. |
2dup |
( n1 n2 -- n1 n2 n1 n2 ) |
Duplicate top two stack items. |
2over |
( n1 n2 n3 n4 -- n1 n2 n3 n4 n1 n2 ) |
Copy second two stack items. |
2swap |
( n1 n2 n3 n4 -- n3 n4 n1 n2 ) |
Exchange top two pairs of stack items. |
clear |
( ??? -- ) |
Empty the stack. |
depth |
( ??? -- ??? +n ) |
Return the number of items on the stack. |
drop |
( n -- ) |
Remove the top item from the stack. |
dup |
( n -- n n ) |
Duplicate the top stack item. |
over |
( n1 n2 -- n1 n2 n1 ) |
Copy the second stack item to the top of the stack. |
pick |
( nu ... n1 n0 u -- nu ... n1 n0 nu ) |
Copy u-th stack item (1 pick = over). |
r> |
( -- n ) |
Move a return stack item to the stack. |
r@ |
( -- n ) |
Copy the top of the return stack to the stack. |
roll |
( nu ... n1 n0 u -- nu-1 ... n1 n0 nu ) |
Rotate u stack items (2 roll = rot). |
rot |
( n1 n2 n3 -- n2 n3 n1 ) |
Rotate three stack items. |
swap |
( n1 n2 -- n2 n1 ) |
Exchange the top two stack items. |
tuck |
( n1 n2 -- n2 n1 n2 ) |
Copy the top stack item below the second item. |