Prototype Design Pattern Explained With Python Example Low Level Design Lesson 23

Summary

Imagine you're playing chess and want to save the current board to try a different move. Do you recreate every piece from scratch ... Ever wondered how Undo/Redo works in a text editor? That's the Memento What if your app accidentally creates 100 Logger objects writing to the same file? Bugs, duplicates, chaos. Singleton How do weather apps send live updates to millions of users at once? That's the Observer You hit "Next" on Spotify and the next song plays. But how does it know which song comes next? That's the Iterator Diwali sale pe 30% off, Holi pe 20% off, normal days pe 5% off... are you writing if-else for every discount? There's a better way! Driving shows 20 min ETA, walking shows 1 hour, cycling shows 40 min... same destination, different behaviour based on ... You walk into a restaurant and just say "Pizza" or "Burger". You don't go to the kitchen and make it yourself. The restaurant ... Opening a file, parsing it, closing it... the steps are always the same, only the parsing logic changes. Why rewrite everything for ... A folder can contain files. It can also contain other folders, which contain more files and folders. But when you right- and hit ... You order a burger, the waiter notes it down, passes it to the chef, and the chef makes it. The waiter doesn't cook, the chef doesn't ... Welcome to another video of the