Running Ruby Script/Program and interacting in command line

Question

I have seen it before but I cannot remember where. I have a Ruby program that I'd like to execute and interact with in command line and call the functions. Similar to irb but within that program. For example:

class Message
 @@messages_sent = 0
 def initialize (from, to)
 @from = from
 @to = to
 @@messages_sent +=1
 end 
end
class Email < Message
 def initialize (from,to)
 super
 end
end

and I want to run the script and call functions such as

my_message = Message.new('NYC','TDOT') 

How? I did the ruby myprogram.rb and just runs it and closes it, I actually want to enter into the program

Answer 1

You need to first require IRB and then type IRB.start where you want to start it:

require 'irb'
IRB.start