GGeoImageTagger·53m agoAI Background Removal in the Browser: What Works, What Breaks, and Why PNG MattersA developer-oriented guide to how browser-based AI background removers handle segmentation, transparency, and the edge cases that still trip them up5 min read·geoimagetagger.hashnode.dev
MMahmoud Daghash·3m agoUnix Timestamp to Excel Date: Why Serial 60 Is a Day That Never ExistedYou paste 1756771200 into a spreadsheet and want to see a date. Or you export a sheet and your API receives a column of numbers like 46236.5 instead of dates. Both directions look trivial and both go5 min read·confileo-eng.hashnode.dev
AAlex Xiao·25m agoThe progress bar that made typing lag: debugging a 331 ms INP in a React gameA timer bar animating its width forced a layout on every keystroke in my React game. How I traced a 331 ms INP in Chrome DevTools and fixed it.8 min read·museek.hashnode.dev
AAbdus Salam·29m ago0.1 + 0.2 Is Not a Bug. It's Arithmetic in a Costume.0.1 + 0.2 prints 0.30000000000000004 in Python and JavaScript alike. Real outputs from Python 3.12, why the extra 4 exists, and the 2 places it actually bites.4 min read·aheadkit.hashnode.dev
SSurendra Singh Kamboj·45m agoHow do you use the lens formula 1/v - 1/u = 1/f? (JavaScript)Lens formula 1/v - 1/u = 1/f with the sign convention, a JavaScript function, and worked cases for convex and concave lenses.3 min read·practisci.hashnode.dev
AAsad Ilyas·4h agoWhat I Learned Building 30 Online Tools in One WeekWhat I Learned Building 30 Online Tools in One Week6 min read·toolfrndhashnodedev.hashnode.dev
SSurendra Singh Kamboj·47m agoHow do you calculate fringe width in Young's double slit experiment? (JavaScript example)Fringe width in Young's double slit experiment is lambda x D / d. Why it works, a JavaScript function and a worked 600 nm example giving 1.2 mm.3 min read·practisci.hashnode.dev
SSurendra Singh Kamboj·49m agoHow to find equivalent resistance in series and parallel (with a JavaScript calculator)Resistors in series add up, in parallel add as reciprocals. Formulas, a JavaScript calculator and a worked example with 10, 20 and 30 ohm resistors.3 min read·practisci.hashnode.dev
DDoogal Simpson·6h agoThe 7 Threads Running Inside Every Node.js ProcessExplore why an empty Node.js process launches 7 OS threads, what V8 does in the background, and how these threads differ from the libuv thread pool.5 min read·doogal.dev21O
SSurendra Singh Kamboj·1h agoSnell's law and total internal reflection in a few lines of JavaScriptSnell's law is one line of maths and one of the first formulas a Class 12 student meets in optics: n1 * sin(i) = n2 * sin(r). Writing it as a function is a quick way to check numericals, and it shows3 min read·practisci.hashnode.dev
