Machine-coding case studies

Design a Vending Machine

Select a product, insert coins, dispense the item, return change. The textbook use-case for modelling behaviour as a STATE machine instead of a tangle of flags. An animated lesson where the diagram draws itself as the design grows.

  • Lesson 2 of 6
  • Animated diagrams
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Machine-coding case studies

  1. 1Design a Parking Lot
  2. 2Design a Vending Machine
  3. 3Design Splitwise
  4. 4Design Tic-Tac-Toe
  5. 5Design BookMyShow
  6. 6Design an Elevator System
6 lessons, each with diagrams that draw themselves.

What you will learn

  • 1. Clarify requirements (always do this first)
  • 2. The naive boolean-flag mess
  • 3. The State pattern
  • 4. Inventory + Product
  • 5. The transition diagram

More low-level design

Watch Design a Vending Machine take shape

Sign in and the lesson opens with its diagram ready to play, and the rest of Machine-coding case studies beside it.

Sign in to open itSee plans

DSA comes with the all labs plan and every ChaiCode batch.