Get list of a class instance methods

Question

I have a class   class TestClass   def method1   end    def method2   end    def method3   end end   How can I get a list of my methods in this class  method1  method2  method3

User · Answer

TestClass instance methods   or without all the inherited methods  TestClass instance methods - Object methods    Was  TestClass methods - Object methods

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You can get a more detailed list  e g  structured by defining class  with gems like debugging or looksee

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To get only own methods  and exclude inherited ones  From within the instance  self methods - self class superclass instance methods  From outside  TestClass instance methods - TestClass superclass instance methods  Add it to the class  class TestClass   class  lt  lt  self     def own methods       self instance methods - self superclass instance methods     end   end end  TestClass own methods   gt    method1   method2   method3    with ruby 2 6 x

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TestClass methods false     to get only methods that belong to that class only   TestClass instance methods false   would return the methods from your given example  since they are instance methods of TestClass

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irb --simple-prompt  class TestClass   def method1   end    def method2   end    def method3   end end  tc list   TestClass instance methods false     method1   method2   method3  puts tc list  method1  method2  method3

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You actually want TestClass instance methods  unless you re interested in what TestClass itself can do   class TestClass   def method1   end    def method2   end    def method3   end end  TestClass methods grep  method1       gt     TestClass instance methods grep  method1       gt    method1   TestClass methods grep  new       gt    new     Or you can call methods  not instance methods  on the object   test object   TestClass new test object methods grep  method1       gt    method1

User · Answer

According to Ruby Doc instance methods      Returns an array containing the names of the public and protected   instance methods in the receiver  For a module  these are the public   and protected methods  for a class  they are the instance  not   singleton  methods  If the optional parameter is false  the methods of   any ancestors are not included    I am taking the official documentation example    module A   def method1         puts  method1 say hi    end end class B   include A  mixin   def method2          puts  method2 say hi    end end class C  lt  B  inheritance   def method3         puts  method3 say hi    end end   Let s see the output   A instance methods false      gt    method1   A instance methods     gt    method1  B instance methods    gt    method2   method1   nil                  methods inherited from parent class  most important  method1 is also visible because we mix module A in class B  B instance methods false      gt    method2  C instance methods     gt    method3   method2   method1   nil                 same as above C instance methods false     gt    method3

[ruby] Get list of a class' instance methods

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