This is a WIP collection of my solutions to exercises from the book Structure and Interpretation of Computer Programs (SICP).
I skipped over some exercises that were too tedious/boring. I will revisit those exercises at a later time.
I used Racket exclusively for all the exercises. Racket is unique amongst languages (even in LISP) with its #lang directive.
It ships with a #lang sicp which I make good use of for most exercises;
it's essentially R5RS with some SICP specific additions to make the environment setup smoother. Notably, racket doesn't like mutation and even removed set-car! and friends
from its implementation (actually they just moved it to mcons set-mcar! etc.).
For chapter 4 I have included a complete data-directed implementation of the initial version of the evaluator. I also included some tests for that evaluator and I will expand on those tests more later. My goal with Chapter 4 is to easily modify the evaluator while still covering functionality with a core test suite. Additional tests will be included for each exercise.
My goal with this repo is to compile my solutions for every exercise in the book in one place. I eventually want to provide a documented approach to working through SICP using Racket. SICP is a fantastic text which is unfortunately difficult to approach due to environment setup issues. Projects like zv's guide are extremely useful in getting through the book, but I still find there is a lot of unnecessary friction. I want to make a quickstart repo which moves all of the hassle out of the way for SICP readers.