|
|
|
|
|
|
|
|
|
|
|
|
| ä | Some
operations affect more than one |
||||||||||
| entity.
Logically, a function returns more |
|||||||||||
| than
one value |
|||||||||||
| ä | Stack
pop operation returns both the value |
||||||||||
| popped
from the stack AND the modified |
|||||||||||
| stack |
|||||||||||
| ä | May
be modeled algebraically using |
||||||||||
| multiple
operations (TOP and RETRACT |
|||||||||||
| for a
stack) but a more intuitive approach |
|||||||||||
| is
to define operations which return a tuple |
|||||||||||
| rather
than a single value |
|||||||||||
