Applicative Functor

Applicative Functors are here!

Things to note:

• wrap (i.e.: pure) & apply are here!
  • Operator for apply: <<~ and ~>>
  • Reversed operator arrow direction for consistence with Elixir
    • ie: in Haskell we think about applyping "over" things (apply [(+1)] [1,2,3])
    • In Elixir, we're piping thing into the application ([1,2,3] ~>> [&(&1 + 1)])
    • Can still write in the Haskell order, with reversed operators:
      • Haskell: (\x y -> x + y) <$> [1,2,3] <*> [4,5,6]
      • Elixir: &(&1 + &2) <~ [1,2,3] <<~ [4,5,6]
• Have to exclude Kernel.apply for modules
  • In the future, we will either need to create a use, or rename apply (probably the later)