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Programming tutorials for people who want code that actually runs, not code that only looks right. Pick a language, start at the beginning, and don't skip the basics. They are where most problems come from.

Any category Programming5 Python 1 JavaScript 1 TypeScript 3
Any topics APIs and Integrations 7 Automation and Scripting 3 Data Structures and Algorithms 2 Databases 11 Deployment and Containers 3 Object-Oriented Programming 3 Packaging and Dependencies 5 Performance Optimization 21 Programming Patterns 10 Testing and Debugging 9 Type Systems 14 Web Development 15
Any level Beginner 2 Intermediate 9 Advanced 5
Programming Packaging and Dependencies Advanced Clear filters 5 results
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Test a Python Wheel Outside the Source Repository

Catch a missing package resource by inspecting a wheel and testing its import, version, data file and console command in a clean environment.

6 min read
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Build and Publish a Small npm Package

Set up name, version, exports and files in package.json, check exactly what ships with npm pack --dry-run, then publish with npm publish. Mistakes in a published version can't be undone.

4 min read
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Migrate One Module While Testing Its JavaScript Boundary

Convert one JavaScript module, catch a lost runtime guard, and verify an unchanged JavaScript caller against the emitted TypeScript build.

5 min read
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Diagnose a Stale TypeScript Project-Reference Build

Reproduce a project-only build that consumes stale shared declarations, rebuild the graph, and verify that an API change reaches its consumer.

6 min read
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Hand-Write a .d.ts for a Small JS Helper

Write a declaration file for a JavaScript helper with a generic function and an overload, then test it with a short file. After this, calls to the helper are checked and the JavaScript stays as it is.

5 min read