Add handwavy justification for switching between "a" and "the".
Chris Pressey
6 years ago
12 | 12 | functions associated with those symbols. |
13 | 13 | |
14 | 14 | Thus, the meaning of a program is a function that takes stacks to stacks. |
15 | ||
16 | A stack contains zero or more elements, and each element may be one of | |
15 | Since the program generally only deals with one stack at a time, it is | |
16 | also possible to think of this as a single stack ("the" stack) which gets | |
17 | modified over time. | |
18 | ||
19 | The stack contains zero or more elements, and each element may be one of | |
17 | 20 | two kinds of values: unbounded integers, and functions which take stacks |
18 | to stacks. A stack is generally accessed in a LIFO fashion, with a few | |
21 | to stacks. The stack is generally accessed in a LIFO fashion, with a few | |
19 | 22 | strategic exceptions. |
20 | 23 | |
21 | 24 | Here is a table mapping the legal Equipage symbols to functions. |