This is part 2 of Loops in Lisp. Click here to view the previous post on how you can build any iteration abstraction you want out of just goto and macros.
The loop macro is probably the most well known … Read the rest
Author: malisper
Loops in Lisp Part 1: Goto
At its core, Common Lisp provides two primitives for performing iteration. The first of those primitives is recursion. Recursion is an amazing technique, but in this post I am going to focus on the other primitive goto.
Goto is extremely … Read the rest
Defmemo
In my last post I talked about memoization i.e. caching the results of a function. Memoization is a fairly common technique for optimization. It is common enough to warrant writing a macro that makes it easy to define memoized functions. … Read the rest
Or=
This post makes use of places. If you are unfamiliar with places, see my post Getting Places.
There are many cases where caching the results of a function (also called memoization), make a function much more efficient. For example … Read the rest
Zap
This post makes use of places. If you are unfamiliar with how places work, see my post Getting Places.
Many languages provide syntactic sugar for evaluating an expression involving a variable and assigning the result of that expression to … Read the rest
Getting Places
This post will serve as an introduction to writing macros that work with places. I will refer back to it whenever I examine a macro which deals with places.
Places are an incredible part of Common Lisp. In short, a … Read the rest
Defasm
This post is the second part of a two part series exploring the emulator cl-6502. If you haven’t read the first part exploring the implementation of addressing modes in cl-6502, you can find it here.
This post is … Read the rest
Defaddress
This post is the first part of a two part series exploring the emulator cl-6502. This post will cover how addressing modes are implemented in cl-6502. The second part will go over the implementation of the opcodes.
cl-6502 is … Read the rest
Debugging Lisp Part 5: Miscellaneous
This post is for all of the miscellaneous features that arent large enough to get their own individual posts. If you havent read all of them, here are the links to the previous posts on recompilation, inspection, class … Read the rest
Debugging Lisp Part 4: Restarts
This is part four of Debugging Lisp. Here are the previous parts on recompilation, inspecting, and class redefinition. The next post on miscellaneous debugging techniques can be found here.
Many languages provide error handling as two … Read the rest