Metaprogramming: Difference between revisions
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→{{header|Common Lisp}}: Show identity comprehension too. Anyone care for state transformer? |
→{{header|Common Lisp}}: The math notation should show the quantifiers. |
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As you can see, the comprehension processes all combinations of X and Y from both sets, and collects the application of (CONS X Y) to these elements.
In other words {∀x∀y:(cons x y) | x ∈ { 1, 2 ,3 } ∧ y ∈ { A, B, C }}
Other monads are possible: idenitity, state transfomer, etc. Some of these are provided in the code below.
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