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comp.lang.ruby

what symbol for class methods?

Diego Virasoro

2/27/2009 4:54:00 PM

Hello,
some methods require as an argument a symbol of a method (e.g.
alias_method). How can one use it with class methods?

Thanks.

Diego
2 Answers

7stud --

2/27/2009 6:04:00 PM

0

Diego Virasoro wrote:
> Hello,
> some methods require as an argument a symbol of a method (e.g.
> alias_method). How can one use it with class methods?
>
> Thanks.
>
> Diego

class A
def A.show(symbol)
puts "%s <--> %s" % [symbol.inspect, symbol.to_s]
end
end

A.show(:hello)

--output:--
:hello <--> hello
--
Posted via http://www.ruby-....

7stud --

2/27/2009 9:01:00 PM

0

Diego Virasoro wrote:
> Hello,
> some methods require as an argument a symbol of a method (e.g.
> alias_method). How can one use it with class methods?
>

Hmm...what does 'it' refer to? Does 'it' refers to alias_method?

As far as I can tell, you can't use alias_method with symbols like:

:self.meth_name

for arguments. However, this seems to work:

class A
def self.greet
puts "hello"
end

class<<self
alias_method :old_greet, :greet
end

end

A.old_greet #hello

--
Posted via http://www.ruby-....