在类中调用类方法 [英] Calling a class method within a class

问题描述

我意识到这可能是一个幼稚的问题，但我仍然无法弄清楚如何在 Ruby 类中从另一个方法调用一个方法.

I realize this perhaps a naive question but still I cant figure out how to call one method from another in a Ruby class.

即在 Ruby 中可以执行以下操作:

i.e. In Ruby is it possible to do the following:

class A
   def met1
   end
   def met2
      met1 #call to previously defined method1
   end
end

谢谢，

RM

推荐答案

那些不是类方法，它们是实例方法.您可以在示例中使用该类的实例从met2 调用met1 没有问题:

Those aren't class methods, they are instance methods. You can call met1 from met2 in your example without a problem using an instance of the class:

class A
   def met1
     puts "In met1"
   end
   def met2
      met1
   end
end

var1 = A.new
var1.met2

以下是使用类方法的等效方法，您通过在方法名称前加上类名来创建这些方法:

Here is the equivalent using class methods which you create by prefixing the name of the method with its class name:

class A
   def A.met1
     puts "In met1"
   end
   def A.met2
      met1
   end
end

A.met2

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