Mixins

Ruby
1

I have the following code separated in 2 files.

module UsefulFeatures

def class_name
self.class.to_s
end
end

require UsefulFeatures

class Person
include UsefulFeatures
end

x = Person.new
puts x.class_name

Every time I try to run this I get the following error:
Test2.rb:1:in `’: uninitialized constant UsefulFeatures
(NameError)

What am I doing wrong?

2

Rong wrote:

Every time I try to run this I get the following error:
Test2.rb:1:in `’: uninitialized constant UsefulFeatures
(NameError)

What am I doing wrong?

require’s argument is a file name

require ‘useful_features’

3

Nevermind. I found it.

4

Hi,

Am Dienstag, 08. Sep 2009, 15:45:28 +0900 schrieb Rong:

Nevermind. I found it.

Sorry, this information is not very helpful. Next time please post
the solution in case somebody googles for it.

Bertram

5

Sorry, this information is not very helpful. Next time please post
the solution in case somebody googles for it.

But the solution is quite easy - he did not require the file properly,
else the constant would be known.