Applied math

• NEW The Amex EveryDay Bonus: A Stochastic Valuation Model
• Adventure Games and Eigenvalues
• Splatoon’s Ranking System Is Still Broken
• Evaluating Splatoon’s Ranking System
• Inferring Tweet Quality From Retweets
• Statistical Formulas for Programmers
• How To Read an Unlabeled Sales Chart
• Holt-Winters Forecasting Applied to Poisson Processes in Real-Time (pdf)

Programming language reviews

• NEW Things That Bother Me About Swift
• A Review of Perl 6
• A Taste of Rust
• Four Days of Go
• Swift Impressions
• Why I’m Betting On Julia
• Why I Program In Erlang

Non-technical essays

• NEW Things That Bother Me About macOS
• You Can’t Dig Upwards
• The Mathematical Hacker
• Don’t Kill Math
• The Other Money Problem
• Start-ups and Emotional Debt

Programming notes

• Why I’m Learning Perl 6
• Type Punning Functions in C
• Elixir RAM and the Template of Doom
• Why I Develop For The Mac
  • Follow-up: Hackers and <canvas>
• Please Offer An Excel Export Option
• Statistical Shortcomings in Standard Math Libraries
• Functional Tests As A Tree Of Continuations

Mathematics of user ratings

• Ranking News Items With Upvotes
• Deriving the Reddit Formula
• Ranking Items With Star Ratings
• Bayesian Average Ratings
• How Not To Sort By Average Rating Popular article, 250,000 page views!
• Rank Hotness With Newton’s Law of Cooling

A/B testing articles

• Simple Sequential A/B Testing
• Formulas for Bayesian A/B Testing
• The Low Base Rate Problem
• A/B Testing Duration Data
• Lazy Assignment and A/B Testing
• Announcing Evan’s Awesome A/B Tools
• Linear Regression For Fun And Profit
• How Not To Run An A/B Test Popular article!

Business notes

• Big Tablets Are Coming
• Escaping The Two-Star Rating Pit
• The Software Scientist
• Apple’s RAM Problem
• Marketing Your Startup Hub
• The Feature Matrix

Big data notes

• Predictive Analytics: What Is It Good For?
• Big Data and the Price-Precision Curve
• In Praise of Small Data

Programming stories

• This Week in Wizard (Tumblr)
• Fixing a Hole in the F-Distribution
• Winkel Tripel Warping Trouble
• Notes on Rendering 2D Graphics on a Mac
• Premature Optimization and the Rise of Nginx Module Development

Erlang references (old)

• Chicago Boss: A Rough Introduction (pdf)
• The Joy of Erlang
• Write a Template Compiler for Erlang

Nginx references (even older)

• Guide to Nginx Module Development
• Advanced Topics In Nginx Module Development

Desktop Mac applications:

Magic Maps Mapping and analysis

Wizard Statistics the Mac way

---

Evan's Awesome A/B Tools (home)

• Sample Size Calculator – How many subjects do you need for your experiment?

• A/B Buddy – A sample size calculator for iPhone and iPad

• Chi-Squared Test – Are the conversion rates statistically distinguishable?

• Two-Sample T-Test – Is the difference in means significant?

• Survival Curves Test – Does the hazard rate differ between two groups?

---

Open-source projects I maintain:

• Hecate – The Hex Editor From Hell!
• ReadStat – SAS/SPSS/Stata reader/writer
  • ReadStat.jl – A wrapper for Julia
• ProjCL – Secret map-projection sauce
• TimeFormatStrings – Excel, Unicode, Stata
• DSShortNumberFormatter – An abbreviator

---

Stuff that still works:

• Erlang:
  • Chicago Boss – Web framework
  • BossDB – An evented ORM for Erlang
  • ErlyDTL – Django template language
  • Aleppo – Erlang Pre-Processor
  • Jerome – Rich-text processing library
• Nginx:
  • mod_zip – Streaming ZIP archiver
  • mod_circle_gif – Lots of round corners
  • mod_rrd_graph – Pretty pictures

---

Project graveyard:

• nginx_upstream_hash (2007–2014)
  A hashing load balancer for Nginx. RIP
• Google Maps Extension (2005–2012)
  Embed and edit Google Maps in your wiki. RIP

---