Posted in未分类
The Seven Switches Inside a Markdown to HTML Converter
A markdown converter looks trivial until it isn't. The value of a good one is making the seven small decisions visible so you can make them on purpose.
Posted in未分类
HCL to TOML: the format swap DevOps hates
The two formats that keep trading places HashiCorp Configuration Language and TOML solve the same…
Posted in未分类
Venn Diagrams That Survive a Three-Meeting Week
A Venn diagram generator that auto-detects parent-child, overlap, and disjoint layouts. Paste JSON or pipe text, get a publishable SVG in 90 seconds.
Posted in未分类
The three segments of a JWT are the only thing standing between an attacker and your API
A JWT looks like one opaque string. It isn't. It is a public header, a…
Posted in未分类
The three text-formatting decisions that decide whether your extracted numbers are real
Three text-formatting decisions quietly decide whether the numbers you pull from a paragraph are real…
Posted in未分类
UUID validator: the five checks that decide whether your identifier is real
A UUID looks simple. Thirty-six characters, four hyphens, eight-four-four-twelve-four pattern. Paste it into your code,…
Posted in未分类
The order of three matrix transforms is the only thing your composite image is actually showing you
You load a square photo into an image composite matrix tool, set scaleX to 0.5,…
Posted in未分类
The R-squared number your regression tool hands you is not the answer
You ran a regression. The tool handed back a tidy block of numbers: a slope,…
Posted in未分类
The two characters in a tracking number that name the carrier
Every tracking number carries its own passport. The first two characters — sometimes three, rarely…
Posted in未分类
A calendar heatmap is the only chart that shows you actually show up
The GitHub contribution graph is not just for code. Used on the right data, a year-of-days heatmap exposes streaks, gaps, and seasonal rhythms that bar charts and line charts actively hide.