> Can't reproduce with what you've given.
>
> ruby-1.9.1-p376 > class A
> ruby-1.9.1-p376 ?> attr_accessor :slot
> ruby-1.9.1-p376 ?> def matches? s
> ruby-1.9.1-p376 ?> puts "s <=> @slot = #{s <=> @slot}"
> ruby-1.9.1-p376 ?> (s <=> @slot) == 0
> ruby-1.9.1-p376 ?> end
> ruby-1.9.1-p376 ?> end
> => nil
> ruby-1.9.1-p376 > a = A.new
> => #<A:0x000000041915b8>
> ruby-1.9.1-p376 > a.slot = "dog"
> => "dog"
> ruby-1.9.1-p376 > a.matches? "dog"
> s <=> @slot = 0
> => true
> ruby-1.9.1-p376 >
>
> String comparison via <=> to nil will return nil. Are you entirely sure
> that in your IRB session your object's @slot isn't nil for some reason?
First, yep, 100% sure that @slot wasn't nil -- I printed it out upon
entering the matches? method. (FWIW, you have it reversed: irb
session worked fine. Driven from a script failed.) Sadly, my
attempts to prune down the example to a reproducible losing case have
failed to fail, so to speak. As suggested by @Matt Brown, I'll take
this over to the ruby-talk list.
Thanks.
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