hillelwayne.com

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• property: og:updated_time content: 2026-04-01T00:00:00Z
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• Blog
• Projects
• Talks
• Consulting
• About
• Chicago vs New York Pizza is the Wrong Argument
• Some Silly Z3 Scripts I Wrote
• A Very Early History of Algebraic Data Types
• Gamer Games for Non-Gamers
• A Perplexing Javascript Parsing Puzzle
• The Hierarchy of Controls (or how to stop devs from dropping prod)
• Hiatus
• Toolbox languages
• Composing TLA+ Specifications with State Machines
• Software Friction
• Don't let Alloy facts make your specs a fiction
• How old is the name 'Daniel'?
• The Hunt for the Missing Data Type
• Planner programming blows my mind
• An RNG that runs in your brain
• The World and the Machine
• Notes on Every Strangeloop 2023 Talk I Attended
• A better explanation of the Liskov Substitution Principle
• Learn AutoHotKey by stealing my scripts
• My Problem With the Four-Document Model
• Somehow AutoHotKey is kinda good now
• Breaking the limits of TLA+ model checking
• Ten weird things you can buy online (and why you would)
• That Time Indiana Almost Made π 3.2
• A Neovim Task Runner in 30 lines of Lua
• NP-Complete isn't (always) Hard
• Sources of Complexity: Constraints
• Let's Prove Leftpad
• Notes on Every Strangeloop 2022 Talk I Attended
• Safety and Liveness Properties
• Software Mimicry
• Crimes with Python's Pattern Matching
• Announcing: Learn TLA+
• I ❤️ Microscopes
• Hiatus
• Using Abstract Data Types in TLA+
• Alloy 6: it's about Time
• How to Solve the Sudoku Puzzle with programming
• Specification Refinement
• Cross-Branch Testing
• Clever vs Insightful Code
• Why Specifications Don't Compose
• Why Do Interviewers Ask Linked List Questions?
• TLA+ Action Properties
• What engineering can teach (and learn from) us
• We Are Not Special
• Are We Really Engineers?
• There's Always More History
• Two workers are quadratically better than one
• Software correctness is a lot like flossing
• Finding Goroutine Bugs with TLA+
• Decision Table Patterns
• J Notation as a Tool of Thought
• A Better Cheatsheet
• The Frink is Good, the Unit is Evil
• Weak and Strong Fairness
• Property Testing with Complex Inputs
• Constructive vs Predicative Data
• In Praise of AutoHotKey
• The Hard Part of Learning a Language
• Announcing: Alloydocs
• 10 Most(ly dead) Influential Programming Languages
• This is How Science Happens
• Feature Interaction Bugs
• The Business Case for Formal Methods
• Hypermodeling Hyperproperties
• How fast do I talk?
• Formally Modeling Database Migrations
• Python Negatypes
• Performance Matters
• Modeling Missing Requirements
• Probabilistic Modeling with PRISM
• At least one Vim trick you might not know
• Alan Kay Did Not Invent Objects
• Modeling Adversaries with TLA+
• Finding Property Tests
• Metamorphic Testing
• Using Formal Methods at Work
• Solving Knights and Knaves with Alloy
• Why Don't People Use Formal Methods?
• STAMPing on event-stream
• A Better Interview
• Modeling Message Queues in TLA+
• Practical TLA+ Now Available
• Optimizing MiniZinc
• Constraint Solving with Minizinc
• 1/0 = 0
• Augmenting Agile with Formal Methods
• Decision Tables
• Formally Specifying UIs
• The Great Theorem Prover Showdown
• Why Does "=" Mean Assignment?
• Just a Whole Bunch of Different Tests
• Formally Specifying a Package Manager
• The Problem With APLs
• Important Women in CS Who Aren't Grace Hopper
• Proving Games are Winnable with Alloy
• Vim Macro Trickz
• Property Tests + Contracts = Integration Tests
• What's the Right Tool for the Job?
• Introduction to Contract Programming
• Calculating Burn Rates in J
• Why TDD Isn't Crap
• Handwriting Programs in J
• Uncle Bob and Silver Bullets
• Instructive and Persuasive Examples
• How Do We Trust Our Science Code?
• Hypothesis Testing with Oracle Functions
• Modeling Zero-Downtime Deployments with TLA+
• Falsehoods Programmers Believe About Dogs
• http://hillelwayne.com/mailto:[email protected]

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