Maintaining keyword arity is hard

You know, sometimes you just can't bother with explicitly stating what keyword arguments that you want to pass.

DRY up your class definitions

Have you ever felt vaguely annoyed at typing the class name in the file name and then typing it again inside the file as well? Have you ever changed a class name and forgotten to change the file name?

Well I have good news for you!


Here is the code! This class allows you to condsolidate the declaration of class names into the file name. It also handles namespacing based on the file path if you are using Rails autoloading.

This works with the single exception of constant lookup via nesting, so you will need to replace constants with variables and methods.

How to reverse an array in Ruby in O(1)

class ReverseArray < Struct.new(:array)
  include Enumerable
  def each(&blk)
    i = array.length - 1
    while i >= 0 do
      yield array[i]
      i -= 1
    end 
  end
end

array = (0..10000).to_a
reverse_array = ReverseArray.new(array)

array.last == reverse_array.first
=> true