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@systemcraftdev

SystemCraftDev

@systemcraftdev·Joined August 2026

Building practical Companion Guides for developers (Git, Python, JavaScript, SQL, VS Code, the command line) at systemcraftpress.com.

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Building practical Companion Guides for developers (Git, Python, JavaScript, SQL, VS Code, the command line) at systemcraftpress.com

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SystemCraftDev's blogs

SystemCraft Presssystemcraftpress.hashnode.dev13 posts

About

Building practical Companion Guides for developers (Git, Python, JavaScript, SQL, VS Code, the command line) at systemcraftpress.com

Available for

Nothing here yet.

SystemCraftDev's blogs

SystemCraft Presssystemcraftpress.hashnode.dev13 posts

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Recently published

SSystemCraftDevinsystemcraftpress.hashnode.dev·1d ago · 5 min read

Python's 'UnboundLocalError' — It's Not a Missing Variable, It's Scope Decided in Advance

Adapted from the Python Essentials Companion Guide. You write a small counter function, and it looks completely reasonable: count = 0 def increment(): count += 1 return count increment() U

SSystemCraftDevinsystemcraftpress.hashnode.dev·4d ago · 4 min read

'Permission Denied' When Running a Script — It's Not Broken, It's Not Executable Yet

Adapted from the Command Line Essentials Companion Guide. You write a script, save it, and try to run it: $ ./deploy.sh -bash: ./deploy.sh: Permission denied The file is definitely there. cat deploy

SSystemCraftDevinsystemcraftpress.hashnode.dev·Sep 10 · 4 min read

VS Code Is Running the Wrong Python — Here's Why the Terminal and IntelliSense Disagree

Adapted from the VS Code Essentials Companion Guide. You created a virtual environment, activated it, installed your packages — and VS Code still can't find them. Or the opposite: IntelliSense recogn

SSystemCraftDevinsystemcraftpress.hashnode.dev·Sep 8 · 4 min read

'Column Must Appear in the GROUP BY Clause' — Why SQL Won't Let You Do That

Adapted from the SQL Essentials Companion Guide. You add one more column to a GROUP BY query, run it, and get this instead of results: ERROR: column "products.name" must appear in the GROUP BY clause

SSystemCraftDevinsystemcraftpress.hashnode.dev·Sep 4 · 4 min read

Git Says You're in 'Detached HEAD State' — Here's What That Actually Means

Adapted from the Git & GitHub Companion Guide. You check out a specific commit to look at some old code, and Git prints this: Note: switching to 'a3f92c1'. You are in 'detached HEAD' state... HEAD