ricardorojass/gracefuldev

Table of Contents generated with DocToc

• Flawless Ruby
  • Very Able Variables
    • Top-Level Constant
  • I Literally Can't Even
    • Large Integer Literals

Flawless Ruby

My notes from Flawless Ruby Course

Very Able Variables

• Working with variables in Ruby

Top-Level Constant

• Constants lookups from inside class to top-level environment.
• First looks in the class level and then in the module level.

FLOWER = "Clover"

module Neighborhood
  FLOWER = "Dogwood"

  module Yard
    FLOWER = "Rose"

    class Parent
      FLOWER = "Mountain Laurel"
    end

    class Child < Parent
      FLOWER = "Dandelion"

      def flower
        FLOWER
      end
    end
  end
end
Neighborhood::Yard::Child.new.flower
# => "Dandelion"

I Literally Can't Even

• Ruby has its own unique take on some of these literal syntaxes. In this section, you’ll learn about how to use Ruby’s literals to make your code extra-expressive.

Large Integer Literals

• One of the simplest forms of literal is an integer (non-fractional) number.
• In Ruby, however, there are some options in how you can choose to write out literal integer values.

Quick question: how many zeroes are in this number?

100000000000

It's hard to visually identify the number of digits in a numeric literal. For instance, in my US locale we would normally split the number into groups of three digits, with commas:

# 100,000,000,000

Thankfully, we can do something similar in Ruby. So we could rewrite this number like so:

100_000_000_000