Writing Module for Ruby

Question

How do you write a module for ruby. in python you can use

# module.py
def helloworld(name):
    print \"Hello, %s\" % name

# main.py
import module
module.hell         


        

Answer 1

# meth.rb
def rat
  "rizzo"
end

# cla.rb
class Candy
  def melt
    "awwwww...."
  end
end

# main.rb
require 'meth'
require 'cla'
require 'mod'

puts rat
puts Candy.new.melt
puts Hairy.shave

In ruby, modules are the name for syntatic constructs used to group methods, constants, classes, and other modules. They're ruby's equivalent of namespaces.

A separate concept isgrouping by file, like above. Often, however, the two concepts coexist, with one file using a single module as its namespace.

# mod.rb
module Hairy
  def self.shave
    "ouch!"
  end
end