📰 Dev.to · BeGoodTool.com

Why "must be subscribed to enter" is a checkbox I had to delete from a YouTube giveaway picker

Why my auto-scrolling teleprompter froze at low speed (and the hidden float that fixed it)

Why splitting text into sentences by punctuation breaks on "Dr. Smith" (I found out building a case converter)

Why "the date exactly halfway between these two dates" doesn't always have one answer

Why `new Date(garbage) === "Invalid Date"` is always false (a timestamp converter taught me this the hard way)

I built a calorie lookup table and realized the search box was already a category filter

Why three "characters" in my HTML symbol table aren't actually there

Why "business days between two dates" isn't a division problem (I only saw it clearly building a workday calculator)

Turns out a "random" spin wheel doesn't pick a winner and rotate to it — it spins first, then checks who's standing there

Why regex match highlighting breaks on nested capture groups (I found out the hard way building a tester)

Why "just convert everything to UTC" is the wrong way to find a meeting time across time zones

Turns out my "random group splitter" doesn't roll any dice — here's what it does instead

A "maintenance margin ratio" isn't one formula — it's two, and mixing them up gives you the wrong liquidation price