Hunt

• There were many design patterns and pattern languages before the Gang of Four was released.
• Calls Hacker News the "orange website".
• Works as an engineering manager at Attune
• Design Patterns are obviously worthwhile.
• How to enable and disable a discount without needing to redeploy?
  • Feature flag: allow disabling and enabling things without deploying
    • Fast rollback
    • Gradual releases
    • "don't roll your own feature flag"
  • Singleton pattern to fix an issue with a websocket being made every time a feature flag is set (?)
    • calls the singleton static #<name> = null <<using a variable name starting with a #>>.
  • Trace function -> Heatmap
  • Decorator pattern: wrap object and add new bheavior to those objects.
    • easy to remove, since you can easily remove the line of code
  • Proxy pattern
    • controls access to an object
    • returns a cached vaalue
    • Proxy exists in JS
    • new Proxy(obj, handler);
      • handler is an object with a function "get" used to trap the return value
      • mdn proxy docs
  • Fluent interface -examples

      - knex query building
      - jquery
      - rxjs