Code Design

• Functional Core, Imperative Shell (destroyallsoftware.com)
• Robert C Martin - Functional Programming; What? Why? When? (youtube.com)

• Moving IO to the edges of your app: Functional Core, Imperative Shell - Scott Wlaschin (youtube.com)

• #BUG: enable mermaid

journey
    title Functional Core, Imperative Shell
    section Side Effects (Imperative Shell)
    I/O: 3: Developer
    Validation: 3: Developer
    section Pure (Functional Core)
    Business Logic: 4: Developer
    section Side Effects (Imperative Shell)
    Validation: 3: Developer
    I/O: 3: Developer