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Pattern gremlins.


I obviously don't understand patterns like I thought that I did.

Can someone tell me why this matches,

    In:		a b c d e f g /. d f :> yes
    Out:	a b c e f g yes

but this doesn't,

    In:		a b c d e f g /. x:d f :> yes
    Out:	a b c d e f g

?

Joe
--
Josef Karthauser (joe at tao.org.uk)	       http://www.josef-k.net/
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