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System design patterns

Sharding, load balancing, CAP tradeoffs, and scaling patterns — interview and production ready.

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System design patterns easy

How to Build an MVP Presenter View Mock in Python

A minimal MVP (Model-View-Presenter) mock showing a Presenter controlling a SlideDeck model with slide navigation and typed state via dataclasses.

dataclasses mvp design-patterns
Python 
from dataclasses import dataclass, field
from typing import List


@dataclass
class SlideDeck:
    title: str
    slides: List[str] = field(default_factory=list)
    current_index: int = 0

    def next_slide(self) -> str:
        if self.current_index < len(self.slides) - 1:
            self.current_index += 1
      …
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