CS 421 — Programming Languages
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Exams
Final Exam
Midterm 1
Midterm 2
Midterm 3
Lectures
Algebraic Data Types Lecture
Big-Step Semantics Lecture
Combinator Parsing Lecture
Continuation Passing Style Lecture
Course Introduction
Grammars Lecture
Higher Order Functions Lecture
Hoare Semantics Lecture
Interpreters I Lecture
Interpreters II Lecture
Lambda Calculus Lecture
LL Parsing Lecture
Loop Invariants Lecture
LR Parsing Lecture
Macros Lecture
Monads Lecture
Monotype Semantics Lecture
Polytype Semantics Lecture
Prolog Applications Lecture
Prolog Lecture
Prolog's Cut Operator Lecture
Recursion Lecture
Regular Languages Lecture
Small Step Semantics Lecture
State Monad Lecture
Type Classes Lecture
Unification Lecture
Variables Lecture
Staff
Egan Johnson
Jasmine Liu
Jiayou He
Mattox Beckman
Nabarun Deka
Sherry Long
Vimarsh Sathia
Yiqiu Sun
Topics
Edsger W. Dijstra
Pairs
The Applicative Type Class
The Functor Type Class
Videos
Basic Recursion
Big Step Semantics
Church Numerals
Closures
Combinator Parsing
Continuation Passing Style
Dynamic Prolog
Evaluation Order
FIRST Sets
Fixing Non-LL Grammars
FOLLOW Sets
Functors and Applicative
Hoare Semantics
Induction
Interpreters 1
Interpreters 2
Introduction to Grammars
Introduction to Higher Order Functions
Introduction to Semantics
Lambda Calculus
Lambda Calculus Examples
LL Parsing
Loop Invariants
LR Parsing
Macros
Map and Foldr
Monads
Monotype Semantics
Objects
Parameters
Polytype Semantics
Product Types
Prolog
Prolog's Cut Operator
Regular Languages
Right Linear Grammars
Shift Reduce Conflicts
Small Step Semantics
State
State Monad
State Monad Example
Subclasses and Subtyping
Sum Types, Part 1
Sum Types, Part 2
Tail Recursion
The Church-Rosser Property
The CPS Transform
The Y-Combinator
Type Classes
Unification
Variables
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Egan Johnson
Egan Johnson
Feb 16, 2026
1 min read
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