Class variable inside block of defining instance method

Ruby
1

Hello.

How do I perform something like this?

It’s the @echo variable inside the block I’m talking about, how do I
gain “access” to it?

Sincerely,
phora.

2

2010/1/24 Mikkel K. [email protected]:

How do I perform something like this?
gist:6a2aa7e86cad8717541f · GitHub

It’s the @echo variable inside the block I’m talking about, how do I
gain “access” to it?

This is not a class variable. It is an instance variable of @listen.

What kind of access do you need?

Kind regards

robert

3

Ruby doesn’t scope quite like that normally, but you can do it using
instance_eval and define_method:

def initialize(server1, server2)
@echo = echo = IRC::Client.new(*server1)
@listen = IRC::Client.new(*server2)
@echo.instance_eval do
define_method :message_received do |nick, channel, message, *args|
if channel == “#Pre”
echo.puts(“PRIVMSG #{echo.channel} :#{message}”)
end
end
end
end

instance_eval has some quirks, and define_method methods are never as
fast as normal methods (since they have full block dispatch
semantics), but this should do what you need.

  • Charlie
4

Thanks to both of you, I’ve used both examples for several tasks.

5

2010/1/25 Charles Oliver N. [email protected]:

 end

end
end
end

instance_eval has some quirks, and define_method methods are never as
fast as normal methods (since they have full block dispatch
semantics), but this should do what you need.

Unlikely, since the method was defined on @listen and not @echo. :slight_smile:
This is probably a better solution:

def initialize(server1, server2)
@echo = IRC::Client.new(*server1)
@listen = IRC::Client.new(*server2)

class <<@listen
attr_accessor :echo
end

@listen.echo = @echo

def @listen.message_received(nick, channel, message, *args)
if channel == “#Pre”
echo.puts(“PRIVMSG #{echo.channel} :#{message}”)
end
end
end

Kind regards

robert