From: Chad Perrin <perrin@...>
Date: 2009-03-01T04:29:16+09:00
Subject: Re: Nexus Programming Language

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On Sun, Mar 01, 2009 at 12:14:01AM +0900, Pascal J. Bourguignon wrote:
>=20
> Would the "inverse" of reverse polish notation be polish notation?
>=20
> [3,3,:+].inverse -> undefined method `inverse' for [3, 3, :+]:Array
>=20
> Seems that's nonsense...  On the other hand:
>=20
> [3,3,:+].reverse -> [:+, 3, 3]

Actually, it's not so much that Polish notation is the reverse of Reverse
Polish Notation, but that RPN is the reverse of Polish notation.  Ahem.

If I recall my efforts correctly, though, the *implementation* of Polish
notation felt more like the "inverse" of RPN than either being the
"reverse" of the other.  In fact, implementing prefix notation felt a bit
like turning RPN inside out.

--=20
Chad Perrin [ original content licensed OWL: http://owl.apotheon.org ]
Quoth Sterling Camden: "The Church doesn't want people calling for
inquisitions."

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