Abstract Heresies

In AI Memo 8 of the MIT Research Laboratory of Electronics (March 4, 1959), John McCarthy gives a definition of the universal S-function app...

Lisp programmers are of the opinion that [] and {} are just () with delusions of grandeur.

There are a few pattern matching constructs in Common Lisp. For instance, destructuring-bind matches list structure against a tree of vari...

Can you come up with an expression that evaluates to the symbol 'scheme in a Scheme system, but evaluates to the symbol 'common-lis...

An anaphoric if expression binds the identifier “ it ” to the value of the conditional in the scope of the consequent (aif (find-broken-com...

Macros are a unique source of power in Common Lisp, but there are some pitfalls to watch out for. A compiler macro is special macro that i...

The way I see it, there are about four five basic ways to use macros in Common Lisp. First are macros that circumvent the regular call-by...