Deep dives into tools,
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Practical guides covering developer tools, health metrics, SEO, converters and more — written to be actually useful.
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Word Boundaries and Lookarounds: Precise Find & Replace
Baker's Percentage: The Ratio That Makes Recipes Scalable
Baker's percentage turns any recipe into a scalable formula. Here's how hydration, salt and yeast ratios work — and how to convert a cup-based recipe into one.
Finding Invisible Characters: Debugging Encoding With Counts
Zero-width spaces, byte order marks, smart quotes and mojibake are invisible on screen and obvious in a character count. Here's how to find and fix them.
Why a 25% Average Return Can Leave You With Nothing
An investment can average 25% a year and return nothing. Here's the gap between arithmetic and geometric means, why volatility drags compound growth, and sequence risk.
Why ALL CAPS Is Harder to Read Than You Think
All-caps text is slower to read, breaks screen reader pronunciation, and reads as shouting. Here's the typography behind why, and when capitals are still the right choice.
Why rgba(0,0,0,0.5) Has No Hex Equivalent
An rgba value isn't a colour, it's a formula. Here's the alpha compositing math behind it, why hex-to-rgba is often impossible, and what premultiplied alpha fixes.
10 Canonical Tag Mistakes That Silently Break Your SEO
Canonical tags fail silently. Here are the ten implementation errors that turn up most often in audits — relative URLs, chains, duplicates, noindex conflicts — and how to find them.
Running, Cycling, Swimming: Why Body Weight Matters Differently
Body weight roughly doubles your running burn but barely changes flat cycling. Here's why weight-bearing and supported activities scale so differently — and where METs fail.
Why 300 Calories of Soup Beats 300 Calories of Crisps
Two 300-calorie lunches can leave you full or starving. Energy density explains why the same calorie target feels effortless with some foods and impossible with others.
URI Blacklists: How One Link Gets Your Whole Email Blocked
Your sending IP can be spotless and your mail still gets filtered — because a domain in the message body is listed on SURBL or URIBL. Here's how link-based blocking works.
Reading a bcrypt Hash: What $2b$12$ Means and Where the Salt Is
A bcrypt hash is four fields packed into one string. Learn to read the version prefix, cost, embedded salt and digest — and why the salt is stored in plain sight.
Base32, Base58, Base85: When Base64 Is the Wrong Encoding
Base64 isn't the only binary-to-text encoding, and it isn't always the best one. Here's what Base32, Base58, Base85 and Base62 solve that Base64 doesn't.
Your Activity Multiplier Is a Bigger Guess Than Your BMR
BMR formulas land within about 10% for most people. The activity multiplier you pick afterwards can swing your daily total by 800 calories. Here's where energy actually goes.
