One of the most common macros that almost everyone keeps in their utilities file is with-gensyms. With-gensyms is a macro that binds a list of variables to gensyms. Thats it! All with-gensyms does it take a list of symbols … Read the rest
Efficiently Building Lists
It is a common problem to need to build up a list of objects and keep all of the objects in the same order they were generated in. The idiom I see everyone use to solve this problem is to … Read the rest
The Ret Macro
The ret macro is simple, but useful. It allows you to bind a variable and simultaneously specify the final value of that variable as the result of the ret expression, hence the name ret, a blend of let and return… Read the rest