`if __name__ == '__main__'` equivalent in Ruby

Question

I am new to Ruby. I\'m looking to import functions from a module that contains a tool I want to continue using separately. In Python I would simply do this:

Answer 1

If stack trace is empty, we can start executing to the right and left. I don't know if that's used conventionally or unconventionally since I'm into Ruby for about a week.

if caller.length == 0
  # do stuff
end

Proof of concept:

file: test.rb

#!/usr/bin/ruby                                                                 

if caller.length == 0
  puts "Main script"
end

puts "Test"

file: shmest.rb

#!/usr/bin/ruby -I .                                                            

require 'test.rb'

puts "Shmest"

Usage:

$ ./shmest.rb 
Test
Shmest

$ ./test.rb
Main script
Test