11 articles across 6 sub-categories
A form wants a JPG of something you have as a PDF, or the other way round. Here's how to decide which format a document should be in, and how to convert without ending up with a blurry mess.
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Loan applications and visa forms always want one PDF made of ten. Here's how to merge them without sending your bank statements to someone else's server, and how to verify that nothing was uploaded.
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The regex syntax I look up most often, on one page, plus a set of practical patterns (including Indian PAN, PIN and mobile numbers) and the mistakes that cause wrong matches or hung servers.
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Base64 shows up in auth headers, JWTs, data URIs and API payloads. It's simple once you see the 3-bytes-to-4-characters trick, and most of the bugs come from three predictable places.
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Most of us copy the Authorization: Bearer pattern from a tutorial and move on. This is the version I wish I'd read first: what's in the token, what the signature really protects, and the mistakes I keep seeing.
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JSON has six value types and a handful of strict rules. Learn those, and the error messages start making sense. Here's the whole thing, plus how to parse it in JS and Python and when to reach for YAML or TOML instead.
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Installing Docker takes ten minutes. Most of the pain comes afterwards: permission errors, a daemon that isn't running, a database container your app can't reach yet. Here's the install plus the fixes.
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The Ubuntu installer itself is easy. What trips people up is everything around it: BitLocker, Fast Startup, Secure Boot and the boot menu key. Here's the whole process, including those.
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Both will run your API fine. The real differences are in how they handle concurrency, how much structure they give you, and what your team already knows. Here's how I'd decide.
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Most system design guides draw boxes for an imaginary Twitter. This one uses a real, small system, the site you're reading, to show caching, atomic counters, a genuine race condition, and what would have to change at scale.
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Half the extensions on most 'must-have' lists are now built into VS Code. Here's what's still worth installing, what you can delete, and the settings that matter more than any extension.
Ram