Tutorials, deep-dives, and privacy-first thinking about developer tools.
Showing 49–60 of 105 posts
RGB to HEX is base-10 to base-16 on three bytes. Here's the exact math, the JavaScript one-liners, alpha channels, and the mistakes that trip people up.
In JavaScript str.length counts UTF-16 code units, so one emoji reports 2 and a family emoji reports 11. Here is how to count emoji characters correctly.
Splitting on spaces gives the wrong count for Chinese and Japanese. Here is how to count CJK words correctly with Intl.Segmenter and character counts.
The 2026 rules for SEO title and meta description length: real pixel limits, the 50–60 character target, and why Google rewrites your titles.
Change one word and your diff lights up the whole line red and green. Here is why line-based diff does that, and how to switch to word-level.
The X 280-character limit isn't a raw character count. Learn how weighted counting, t.co URLs, and emoji work — and how to pack more into every post.
The real average reading speed is about 238 words per minute, not 300. Here are the 2026 numbers, how to turn word count into reading time, and whether speed reading works.
Learn how to compare two JSON files without key-order and whitespace noise. Normalize first, sort keys with jq, and diff only the changes that matter.
Five regex mistakes that make a pattern match too much — greedy .*, unescaped dots, missing anchors, loose alternation, nested quantifiers — with the fix for each.
The LCS algorithm is how a diff tool finds the fewest insertions and deletions between two texts. Here is how longest common subsequence actually works.
A practical guide to regex find and replace in VS Code: capture groups, $1 substitution, case modifiers, and the side-by-side diff preview.
Ignore whitespace in a diff and you cut formatting noise — but the same flag can hide real bugs in Python, YAML, and Makefiles. Here's when to use it.