Common Lisp Notes

README.md

Common Lisp Notes

All symbols: http://www.lispworks.com/documentation/HyperSpec/Front/X_AllSym.htm

Resources

• Simplified Common Lisp Reference: https://jtra.cz/stuff/lisp/sclr/index.html
• Lots of examples from CSCI 330: http://csci.viu.ca/~wesselsd/courses/csci330/code/lisp/
• The Common Lisp Cookbook: https://lispcookbook.github.io/cl-cookbook/
• The Hyperspec: http://www.lispworks.com/documentation/HyperSpec/Front/
• Practical Common Lisp (full text): https://gigamonkeys.com/book/
• Lisp vs Scheme vs Clojure: https://hyperpolyglot.org/lisp
• Rainer Joswig on stackoverflow: https://stackoverflow.com/users/69545/rainer-joswig

Libraries to look into

• for
• ergolib
• str

Types

• Strings: "hello"
• Characters: #\z
• Numbers:
  • Bit: 0, 1
  • Integer: 42
  • Single float: 12.3, 12.3f0, 1.23e1
  • Double float: 12.3d0
  • Ratio: 1/2
  • Complex: #c(1 2) (1 + 2i)
• Boolean:
  • nil and '() are falsy, everything else is truthy.
  • t is true.

Making bindings

Values:

• local: let, let*
• global: defvar, defparameter, defconstant

Mutation:

• setq, setf

Functions:

• local: flet, labels
• global: defun

• What's difference between defvar, defparameter, setf and setq

Aliasing a function

Aliasing evenp as even?:

(setf (fdefinition (quote even?)) (function evenp))

(setf (fdefinition 'even?) #'evenp)

let

(let list of pairs expression expression ...)

(let ((a 1)) (print a))

(let ((a 1) (b 2)) (print a) (print b))

sclr | hyperspec

let*

Use let* when you need to define variables in terms of each other.

(let ((a 1) (b a)) (print a) (print b))

hyperspec

loop

• LOOP for Black Belts
• Tutorial for the Common Lisp Loop Macro

hyperspec

Advent of code 2021

• problem 1: https://gist.github.com/cellularmitosis/1493b0d1727d57d3571e2fce11aa1e20