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PostgreSQL String Manipulation & Pattern Matching: A Practitioner's Cheat Sheet

You already know SELECT. This is the string toolbox I reach for daily when cleaning, parsing and reshaping text in Postgres, with the gotchas that actually bite in production. One schema, one dataset,

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Java 21 Features in Java

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Java 17 Features in Java

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How to Handle Errors the Right Way in Flutter: A Practical Guide to Sealed Classes, Records, and Result Types

I used to think I was handling errors well in my Flutter apps. I had try/catch blocks everywhere. I was catching exceptions, logging them, and showing error messages to users. It felt solid. Then I st

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Abstract AlgorithmsMay 3

Java 14 to 17: Records, Sealed Classes, Text Blocks, and Pattern Matching

Records eliminated boilerplate. Sealed classes enforced type hierarchies. Pattern matching removed redundant casts. Java 17 LTS made it stable.

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Alain Iglesias HerreraNov 4, 2025

Regex beyond the usual: creative uses that actually save you hours

There are two kinds of developers: those who fear regex, and those who use it like a superpower. The funny part? It’s the same tool — the difference is perspective.Most people think of regex as the thing you use to validate emails, phone numbers, or ...

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Lucian GhindaOct 16, 2025

How to Use Pattern Matching to Locate Elements in a Hash Array

Learn how to effectively use Ruby's pattern matching to locate elements within a hash array and handle exceptions

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Sealed Classes in Java

Sealed classes are one of the biggest “modern Java” features that came after Java 8, finalized in Java 17 (LTS). They give you more control over inheritance and make class hierarchies safer and easier to reason about. 1. The problem they solve In Ja...

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⏳ Scala 2 Essentials: Building a Strong Foundation

@Credit - Daniel Ciocîrlan, Kannupriya Kalra, Adrien Piquerez, Scala Center Before diving into advanced functional programming and Scala 3’s new features, every developer needs a solid foundation. The Scala 2 Essentials course by Daniel Ciocîrlan (R...

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