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comp.lang.ruby

Re: define_method fun

Eric Hodel

2/18/2006 8:25:00 PM

On Feb 17, 2006, at 7:32 PM, Patrick Ritchie wrote:

> Hi All,
>
> I just setup the following in one of my classes, I'll let the code
> speak for itself:
>
> ["<", "<=", ">", ">=", "==", "<=>"].each do |op|
> define_method(op) { |comparison| eval "#{self.order} #{op} #
> {comparison.order}" }
> end
>
> Ruby continues to impress me with it's ability to do so much in so
> few amazing readable lines of code.
>
> Are their any good reasons not to declare my op methods this way?
> Is their an even more efficient way to achieve the same effect?

class YourClass

include Comparable

def <=>(other)
self.order <=> other.order
end

end

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