Steven Kalt

The problem If you’re using Spring Boot with Spring Data JPA, you’ve probably got a configuration file like this sitting near your server: # application.yml spring: datasource: url: jdbc:mysql://mysqldb:3306/mydb username: root # <-- credentials pass…

Summary This is a cautionary tale about how I ended up writing a (bad) regular expression parser and evaluator in pure TypeScript types. type HexStr<S extends string> = Recognize<"[0-9a-fA-F]+", S>; type IsMatch<S extends string> = HexStr<S> extends S ?

The problem I wanted to parse docker-style container image references for a personal project I was writing in rust.

TL;DR: Using mypy, pydantic, and FastAPI, I generate an openapi.yaml, then I use openapi-generator to create a typescript API client.

SQL is a convention.

TL;DR: we’re all operating on the same hardware that cavemen operated on.

TL;DW: an enormous speed boost followed immediately by crashing straight into IAM’s guardrails.

TL;DR: A SIMD value is called a vector. […] A SIMD vector has a fixed size, known at compile time. [ A] vector is generally aligned to its entire size.

TL;DR: I wrote a bad psql meta-command parser so you don’t have to.

TL;DR: A CPU has several kinds of memory.

TL;DR: add an ARCHITECTURE.md document to make contributing to your codebase easier for newcomers A high-level map of the codebase architecture helps newcomers find where to start reading An ARCHITECTURE.md document should cover: how different sections of…

a TUI for creating conventional commits.

I’ve enjoyed using this technique!

TL;DR: Instead of texting “hi” and waiting for a response, say “hi” and ask your question in one message.

Ever wanted to check in your build artifacts into a build-specific branch?

If you want a dataset of HTML versions of the linux man pages.

TL;DR: a video of a typical microservices architecture meeting.

With a sufficient number of users of an API, it does not matter what you promise in the contract: all observable behaviors of your system will be depended on by somebody.

My 2019 holiday card.

TL;DR: parsers take less-structured data and try to turn it into more-structured data.

TL;DR: “to define and enforce culture and values for their whole organization, and to ratify good decisions.”

A set of jekyll _includes that allow you to use hashed assets from webpack or another asset wrangler in Jekyll without a plugin.

Why bother?

monkey-see-monkey-vue exposes methods for finding events that Vue.js will react to.

A tool to help my team incrementally adopt consistent python style by formatting only changed lines.

Inspired by the beautiful parallax of the Firewatch website, I made a SVG+SCSS parallax snow globe as a 2018 holiday card.

Webpack and compilers can produce hashed asset bundles ( like index.bundle.md5h4sh3d.js).

TL;DR: All build systems vary on the following axes: when the build system learns about dependencies (in the build specification or after doing some work) what information the system stores about previous builds where information about previous builds can…

TL;DR: an in-depth talk by tenured Harvard professor James Mickens describing why unexplainable ML models will always be a security risk.

Background Coming into 2018-19, Mozilla Developer Network (MDN) had crowdsourced HTML tables of compatibility between browsers and features of web standards.

A tone-based image to ascii art tool.

TL;DR: Use tech your team is familiar with if it gets the job done shiny new tech has lots of unknown unknowns

A tool that transforms geojson to filesystem pyramids of mapbox vector tiles (.mvt) using node.js.

Mapbox provides an excellent selection of symbols for map-making with its Maki icon set.

A lightweight javascript module to format WFS-T-2 statements from GeoJSON features.

I wrote a lightweight javascript module to translate GeoJSON to GML 3 or 2.

An experiment visualizing Leemis and McQueston’s Univariate Distribution Relationships chart.

TL;DR: do research state what you know ask factual questions

But we can describe some of the ideas in words.

TL;DR: quickly calculate how much time you’d save before automating a task.

This article is an unflinching look at the realities of corporate software development as of 2010.

TL;DR: Follow these rules for acceptable pretty printing: if an expression is longer than the room left within a maximum length, fold it. else, don’t.

A “hacker” is a person who has gone past using his computer for survival (“I bring home the bread by programming”) to the next two stages [(“social life,” and “entertainment”)]. – Linus Torvalds in “What Makes Hacker’s Tick?

In The Cathedral and the Bazaar, Eric S.

Organizations tend to produce designs which mimic their internal communication structure