Beginner · 4h 20m · lessons

Data Structures, Gently

Meet the everyday containers that hold your data — and learn when to reach for each one.

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What you'll learn

  • ✦Explain what a data structure is and why the right one makes code faster and clearer
  • ✦Use arrays and lists confidently, and know when indexing beats searching
  • ✦Recognise stacks (LIFO) and queues (FIFO) and name real problems each one solves
  • ✦Reach for a hash map or set to look things up instantly and remove duplicates
  • ✦Picture trees and graphs, and describe what they're good at storing
  • ✦Read Big-O notation and compare the cost of common operations without heavy math
  • ✦Choose a sensible data structure for a new problem using a short checklist
  • ✦Talk about data structures clearly in interviews and code reviews
  • ✦See where stacks, queues, and recursion appear in real apps, and iterate collections cleanly
  • ✦Weigh time vs space, mutable vs immutable, and move from structures toward algorithms

Syllabus

Module 1
Why structures matter Free
Module 2
Lists, stacks & queues Locked
Module 3
Maps & sets Locked
Module 4
Trees, graphs & cost Locked
Module 5
Structures at work Locked
Module 6
Picking & measuring Locked