CODEWITHSUNDEEP
rubymetaprogramming
mb14
mb14

Reputation: 22636

How to use define_method in a mixin?

Hi I'm trying use a mixin to define some method using define_method. I would like to do something like 

module A
  %w(a b c d).each do |w|
     define_method(w) { "method #{w}" }
  end
end

So I can then do

class B
  include A
end

B.new.c # => 'method c'

But that doesn't work.

I've tried (almost) everything involving included, instance_eval class_eval etc... nothign work.

Is it possible to do ?

Update

There were initially a syntax error in the example I posted, but that wasn't the real problem. I just made the example for the post, that wasn't the real example (which a bit too long to be posted).

My problem was I used a comma in my list %w(a, b, c, b) instead of %w(a b c b)

Therefore, a, was defined instead of a. Silly me, (hard to spot though).

Seeing that it works for you guys helped me solving the problem, thanks

Upvotes: 0

Views: 253

Answers (1)

manojlds
manojlds

Reputation: 301587

Shouldn't the module be:

module A
  %w(a b c d).each do |w|
     define_method(w) { "method #{w}" }
  end
end

that is, the end was missing.

Upvotes: 4

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