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Big O Notation for Working Developers: Finding the Loop That Doesn't Scale
Blog Summary
Big O isn't interview trivia. It's the reason code that handles 200 rows times out at 20,000. Here's a practical guide with real examples: hidden nested loops, database indexes, N+1 queries, and when it doesn't matter.
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SQL vs NoSQL: How to Choose a Database Without the Hype
Blog Summary
"SQL doesn't scale" and "NoSQL is faster" are both half-truths. Four myths, one honest comparison table, when NoSQL really fits, and how MySQL JSON columns give you flexibility without a second database.
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Zero-Downtime Database Migrations: The Expand and Contract Pattern
Blog Summary
Renaming a column is one line of code and, deployed naively, a short outage. The expand and contract pattern lets you change your schema while old and new code run side by side, with Laravel examples.
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How a Database Index Works: A B-Tree in Five Minutes
Blog Summary
You added an index and the query is still slow. Or you added five and now inserts crawl. Both make sense once you can picture a B-tree. Here's the phone book version, in five short minutes.
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Seven MySQL Indexing Mistakes That Quietly Slow Down Your App
Blog Summary
You added the index and the query is still slow. Here are seven indexing mistakes I keep seeing in real apps, why MySQL ignores your index in each case, and the fix for every one.
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01. About Shiroz
Mohammed Shiroz
Hi, I'm Mohammed Shiroz, a software engineer and AI enthusiast from Sri Lanka who turns ideas into intelligent, real-world solutions. With over 9 years of hands-on experience, I currently lead real estate ERP development at Kate Group, a...
02. Last Posts
03.My Projects
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