require_relative doesn't pull the variables?

Question

Been learning Ruby from _why's book and I tried to recreate his code, but it doesn't work.

I have a world.rb file ;

puts "Hello World" Put_the_kabosh_on = "Put the kabosh on" code_words = { starmonkeys: "Phil and Pete, thouse prickly chancellors of the New Reich", catapult: "Chunky go-go", firebomb: "Heat-Assisted Living", Nigeria: "Ny and Jerry's Dry Cleaning (with Donuts)", Put_the_kabosh_on: "Put the cable box on" }

And in my other file, pluto.rb ;

require_relative "world" puts "Hello Pluto" puts code_words[:starmonkeys] puts code_words[:catapult] puts code_words[:firebomb] puts code_words[:Nigeria] puts code_words[:Put_the_kabosh_on]

I know my require_relativeworks, because if I run pluto.rb without the hash part (just puts "Hello World"), Hello World gets printed!

If you're expectecting the code_words local variable to exist in pluto.rb, then it won't. This is the way require(_relative) works — Frederick Cheung
– Frederick Cheung, Commented May 12, 2016 at 8:56
Within a Rails app, you should put these in a YAML file. Take a look at guides.rubyonrails.org/i18n.html — Stefan
– Stefan, Commented May 12, 2016 at 9:53

Amadan · Accepted Answer · 2016-05-12 08:59:44Z

Local variables are local: they don't survive across a require. Global variables ($code_words), constants (CODE_WORDS) and instance variables (@code_words) do. Class variables (@@code_words) do as well, but you'll get a warning. Of these, constants are the least smelly; but it would be better if you put them in a module to namespace them:

module World CODE_WORDS = { ... } end

and in pluto.rb:

require_relative "world" puts World::CODE_WORDS[...]

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