Welcome! I’m Jon, a software engineer based in Japan with professional experience in .NET (C# and F#) and Ruby on Rails. This blog is where I share learnings, tips, and thoughts related to software engineering. No AI is used in my writing; the typos are all mine. よろしくお願いします。
Posts
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Auto-wrap Git commit messages in Vim
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AI Roundup: 2026 Q3
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Handling Unsupported Kanji in Shift-JIS (※日本語要約付き）
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Leveraging Monoids For Associative Binary Operations in Haskell
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AI Article Roundup: 2026 Q2
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Haskell
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Ruby: Resolving NoMethodError - undefined method 'collect' error during CSV creation
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Cleaning Up Old F#
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Ruby Unicode Normalization
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The Joy of Learning, Function Composition–Style
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AI Article Roundup: 2026 Q1
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On The Brevity of Ruby Code
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AI Article Roundup: Late 2025
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FP in Ruby: Composition
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On LLMs
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One Year of F# and Functional Programming
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Option Pipeline Vs. If-Then
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On comparing null and 0
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Learning F# Type Providers via Audio Tag Tools
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Android File Transfer on macOS Sequoia
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Currying in Ruby
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xkcd Scream Cipher
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Regex: Extract messages from Rails logs
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Installing Ruby on Rails on M1 MacBook Pro
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Unicode Normalization Forms and Recursive Path Normalizer (F# Script)
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Advent of Code 2024 in F#
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Ruby on Rails: simple_format()
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.NET 9
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JetBrains Rider
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Recursive Random Resource Renaming Redux
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Recursive Random Resource Renaming in Ruby
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Tips for Articles and Videos
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VS Code: Jumping to line numbers
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Resolving intermittent Android File Transfer connection failures on macOS
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Improved processes and another happy stakeholder
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C#: Safer Dictionary access in CCVTAC
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C# Type Unions Proposal
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Difftastic
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On grepping curl output
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F# Script: Convert Text to Slack Emoji
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Ruby Script: List of Method Names in Files
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Ruby Script: Convert Text to Slack Emoji
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F# 8’s _.Property shorthand
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Unescape JSON in .NET
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DaysSince F# script
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A REPL for C#
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Jumping Into GitHub Actions
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F# “enquoten” script
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Further F# Interop
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Thinking About Recursive Functions
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First Foray Into F#
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Quadratic formula in multiple languages
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The Evolution of Pattern Matching in C#
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Code Refactor Comparison
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Making Invalid States Unrepresentable
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Rust koans
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Bookmarklet: Toggle GitHub PR comment visibility
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Fixing Rust koan errors in Visual Studio Code
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F# Koans
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Ruby script for batch audio conversion
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Using cut with grep results
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Bookmarklet to move new-comment Jira controls higher
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Bookmarklet to list page headings
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Ruby Koans
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My first NuGet package: Startwatch
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Omnivore extension for Firefox
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Welcome
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