Welcome to DSA Concepts

This course is the map. Seventeen lessons, one per data structure family, covering everything you need to know at overview depth. What each structure is, when you'd use it, what it costs, and how it looks in Go.

You won't implement a red-black tree. You'll build a mental model of the entire DSA landscape so that when you encounter a problem, you know which tool to reach for. Each lesson ends with curated practice problems if you want to apply what you learned.

What You'll Learn

• Complexity Analysis: Big-O, the five common classes, how to eyeball cost
• Linear Structures: Arrays, slices, hash maps, stacks, queues, linked lists
• Trees: Binary trees, BSTs, heaps, tries — when hierarchy matters
• Graphs: Representation, traversal, shortest path, spanning trees
• Algorithmic Strategies: Dynamic programming, greedy algorithms, bit manipulation

Why This Course?

Most DSA resources are either too shallow (just definitions) or too deep (500 LeetCode problems). This course sits in the middle: deep enough to build real understanding, shallow enough to finish in a weekend.

After this course, you'll know what every major data structure does and when to use it. If you want to go deeper — implement them, solve problems, prepare for interviews — the deep-dive courses in this series take each family and spend 10-12 lessons on it.

Why Go?

Go's simplicity makes data structures transparent. No hidden allocations, no magic methods, no inheritance hierarchies. A slice is a pointer, a length, and a capacity. A map is a hash table. What you write is what runs.

// A slice header — that's all it is
type slice struct {
    array unsafe.Pointer
    len   int
    cap   int
}

The patterns transfer to any language. The clarity is unique to Go.

Prerequisites

Basic Go: variables, functions, structs, slices, maps, pointers. If you've done Go Essentials, you're ready.

Course Structure

17 lessons. Each one covers a family of data structures or algorithms. Short code snippets show the idea in Go. Key takeaways at the end of every lesson make review easy — skim them in 30 seconds to refresh.

Pick your first lesson from the sidebar.