Ruby - 不确定调用函数的语法

I am in the ruby console, and I am trying to invoke a method and I am not getting the syntax right.

我在ruby控制台,我试图调用一个方法,我没有正确的语法。

Here is the structure of the file:

这是文件的结构:

module App
  module Tools
    module Pollers
      class Kpi
        attr_reader :start_time,:stop_time

        def initialize(start_time,stop_time)
          @start_time = start_time
          @stop_time = stop_time
        end
        .....

and I am trying to invoke this in the console like this:

我试图在控制台中调用这样:

?> kpi = App::Tools::Pollers::Kpi.initialize(start,end_date)
SyntaxError: compile error
(irb):17: syntax error, unexpected tCONSTANT, expecting kDO or '{' or '('

Would someone be able to point me to the right syntax for invoking the initialize ?

有人能够指出我正确的语法来调用初始化吗?

Thanks!

3 个解决方案

#1

Judging by the error message, the problem is elsewhere, but you'll probably want Kpi.new, not Kpi.initialize.

从错误消息判断,问题出在其他地方,但你可能想要Kpi.new,而不是Kpi.initialize。

Well, apparently it's not elsewhere :)

好吧,显然它不在其他地方:)

#2

initialize is an instance method of class Kpi. App::Tools::Pollers::Kpi is a class, and can only have class methods ran on it. Ruby provides a class method for initialization to every class for free. This method is new. Call new, which takes the same arguments as your initialize, and returns an instance:

initialize是类Kpi的实例方法。 App :: Tools :: Pollers :: Kpi是一个类,只能运行类方法。 Ruby为每个类提供了一个免费初始化的类方法。这种方法是新的。调用new,它接受与initialize相同的参数,并返回一个实例:

kpi = App::Tools::Pollers::Kpi.new(start,end_date)

#3

It would be

这将是

App::Tools::Pollers::Kpi.new(start,end_date)

There also seems to be a syntax error earlier in your irb session.

您的irb会话中似乎还存在语法错误。

#1