Ruby Calling Class Method from Instance Method

Question

What is the syntax for calling a class method from an instance method? Suppose I have the following

class Class1
    def initialize
       #instance method
       self.class.edit
       puts "hello"
    end

    def self.edit
       #class method
       "ha"
    end
end

c= Class1

When I run this code, I get no outputs.

Try Class1.new. initialize is an instance method, so it must be invoked on an instance of Class1. Class1.new creates the instance, invokes initialize on it and then returns the instance. — Cary Swoveland
– Cary Swoveland, Commented Oct 23, 2016 at 2:48

tadman · Accepted Answer · 2016-10-23 04:12:12Z

5

You don't get any output because you don't do anything with the result of that call, plus you don't actually create an instance with new, you just make c an alias for that class. If you change it a bit you get this:

class Class1
    def initialize
       #instance method
       puts self.class.edit
    end

    def self.edit
       #class method
       "ha"
    end
end

c= Class1.new

answered Oct 23, 2016 at 4:12

tadman

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