Why Best Practices?

Transcript

1. I Only Have Time to Make One Point The others

   made me include this slide!

2. .

3. Thanks!

4. Why Best Practices?

5. How Should We Use Struct? class Specialized < Struct.new(:whatever) #

   ... define custom methods here... end Specialized = Struct.new(:whatever) do # ... define custom methods here... end

6. I Prefer the Block Form But that’s not the point!

7. Code Similarity and Malleability Specialized = Struct.new(:whatever) do # ...

   define custom methods here... end Trivial = Struct.new(:whatever)

8. An Extra Class • The anonymous class doesn’t tell us

   much • Code reloading may cause “TypeError: superclass mismatch…” [Specialized, #<Class:0x007f8ba7389d18>, Struct, Enumerable, Object, PP::ObjectMixin, Kernel, BasicObject] class Specialized < Struct.new(:whatever) # ... define custom methods here... end

9. The “super” Problem class Specialized < Struct.new(:whatever) def whatever super

   || :default end include SomeMixin end Specialized = Struct.new(:whatever) do def whatever self[:whatever] || :default end prepend SomeMixin end

10. The Point • It’s not about the one right way

    to code • It’s about what we learn in the discussion • This trivial example alone includes: • Code malleability • The ancestor class chain • The value of prepend