// notes/
Coding tips and build notes by Mahir Faysal, a student web developer in Bangladesh: tested Python, HTML, CSS, JavaScript and PHP tutorials, plus notes from my Next.js and Gemini projects. Sample posts are marked and drafts stay in the admin area.
A single SMS holds 160 characters when every character belongs to the GSM-7 alphabet, but only 70 characters if the message contains even one emoji, curly quote or other Unicode symbol.
%20 in a URL means a space. URLs can't contain raw spaces, so browsers and servers replace each space with a percent sign followed by 20, the hexadecimal code for the space character.
Base64 encoding turns any sequence of bytes into a safe string of ASCII characters using a 64-symbol alphabet, with = used as padding when the input length is not a multiple of three.
// filter
This view is only the category, tag, or search you asked for. Sample warnings still apply on any article that carries them. Drafts are still hidden. The full list is the learning notes page, which also explains how a note is written and why some posts are marked Sample.