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46 @hauleth's answer is correct If __file__ == $0 foo() bar() end but it's definitely not common. There is no main method or structure in ruby

I just want to provide a slightly different view here along with some explanation Modules and scripts are supposed to stay separate, so i wouldn't be surprised if there isn't really a good, clean way of doing this When you execute ruby somefile.rb, ruby executes all of the code in somefile.rb.

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You can see puts self code returns string main, and it is an instance of object, the root class of ruby’s class hierarchy So we can conclude that increment is an instance method in the object class Actually, all ruby functions are private methods of object. The main object in this chapter, you will learn about the main object and that the instance variables at the top level is bound to the main object

In ruby, everything in executed in the context of some object The methods are bound to the value of self Whenever self points to main, the methods are bound to main What is a main object?

Here is a fun way to play with ruby while trying to explore some basic concepts

Context someone asked me the following question When i write in irb or in a file the. Maybe you’ve noticed that ruby scripts are executed in some special space or scope which is called “main”, let’s try to clarify what it is. From the ruby i've seen out in the wild (granted, not a ton), this is not a standard ruby design pattern

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