Get list of a class’ instance methods
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/) # => [] TestClass.instance_methods.grep(/method1/) # => [“method1”] TestClass.methods.grep(/new/) # => [“new”] Or you can call methods (not instance_methods) on the object: test_object = TestClass.new test_object.methods.grep(/method1/) # => [“method1”]