Level 1
Understanding Stacks: The Pancake Stack
Learn how stacks work through a delicious pancake stack analogy. Discover why the last one in is the first one out.
Author
Mr. Oz
Duration
5 mins
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Master software development through structured content organized by difficulty levels. From beginner basics to advanced internals.
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Level 2
Understanding Stacks — Level 2
Implementation details, array vs linked list stacks, and common operations.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Stacks — Level 3
Memory layout, call stacks, recursion, and performance considerations.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Merge Algorithms: The Card Game
Discover how merge algorithms work through an engaging card game analogy. Learn why combining sorted data is different from combining unsorted data.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Merge Algorithms — Level 2
Technical implementation, dummy node pattern, and common pitfalls to avoid when working with merge algorithms.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Merge Algorithms — Level 3
Memory layout, CPU cache performance, SIMD optimizations, and real-world performance benchmarks.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Sliding Window: The Train Window
Discover how sliding window technique works through an engaging train window analogy. Learn why two pointers are better than one for many problems.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Sliding Window — Level 2
Two pointer techniques, fixed vs variable-size windows, and production-ready patterns for common problems.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Sliding Window — Level 3
Memory layout, CPU cache performance, and advanced optimization. When to use sliding window vs. other approaches.
Author
Mr. Oz
Duration
12 mins
Level 1
Understanding Hash Tables: The Magical Catalog
Discover how hash tables work through an engaging library catalog analogy. Learn why instant lookups make them one of computer science's most powerful tools.
Author
Mr. Oz
Duration
5 mins
Level 2
Understanding Hash Tables — Level 2
Hash functions, collision resolution strategies, and common operations for production-ready hash tables.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Hash Tables — Level 3
Memory layout, CPU cache performance, and advanced optimization. When to choose hash tables over arrays or trees.
Author
Mr. Oz
Duration
12 mins
Level 2
Understanding Linked Lists — Level 2
Pointer manipulation, traversal algorithms, insertion and deletion operations for production-ready code.
Author
Mr. Oz
Duration
8 mins
Level 3
Understanding Linked Lists — Level 3
Memory layout, CPU cache performance, and low-level optimization. When to choose linked lists over arrays.
Author
Mr. Oz
Duration
12 mins
How It Works
1
Pick a Topic
Browse categories and find the topic you want to learn. Each topic is covered in multiple levels.
2
Start at Your Level
Begin with Level 1 for basics, or jump to your current understanding. No prerequisites needed.
3
Level Up
Progress through levels to deepen your understanding. Each level builds on the previous one.