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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 Programming2 Python 1 JavaScript 1
Any topics Data Structures and Algorithms 2 Databases 10 Deployment and Containers 1 Packaging and Dependencies 2 Performance Optimization 1 Programming Basics 16 Security 1 Testing and Debugging 12 Type Systems 10 Web Development 11
Any level Beginner 2 Intermediate 4 Advanced 2
Programming Data Structures and Algorithms Beginner Clear filters 2 results
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Python Lists in 15 Minutes: Add, Remove, Loop, Done

The four list moves you need on day one: make a list, add to it, remove from it, and loop over it. Plus the one mistake that gives wrong results without any error. Nothing more. The rest can wait until you need it.

5 min read
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JavaScript Arrays in 15 Minutes

Arrays hold lists: cart items, names, scores. Create them, read them, add and remove items, find things, and copy them without changing the original by accident.

4 min read