From: "Jürgen Strobel" <strobel@...>
Date: 2006-08-31T00:54:08+09:00
Subject: Re: and and or priority

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On Tue, Aug 29, 2006 at 08:55:09AM +0900, Michael W. Ryder wrote:
> Pavel Smerk wrote:
> >OMG!
> >
> >Why the and and or operators have the same priority? Unlike && and ||=20
> >and also unlike the most of, or maybe all, other languages and conventio=
ns?
> >
> >(Yes, long time spent on that now, who would expect such a curiosity...)
> >
> >Thanks for explanation, if there is any,
> >
> >P.
>=20
> Smalltalk evaluates and and or operators the same way.  Most evaluation=
=20
> is done from left to right with only a few different priorities.

Yes, and this is consistant behaviour for Smalltalk, as Smalltalk uses
left to right evaluation even for +, * arithmetic.

I wouldn't say it is wrong the way ruby does it, but not exactly
intuitive either. Choosing to follow english language rather than
widespread convention *and* similiar constructs in ruby itself (&&,
||, +, *, ...) may seem a bit ... anti POLS.

I feel this is a true case of POLS violation, not one of those "I
don't know shit, and I was surprised" examples. I do know about
operator precedence in ruby in general, and was surprised by this
special case. Never ran into it myself though, probably because of
luck or spurious parentheses.

It's not a major deal. It certainly can't be changed in 1.8 without
breaking code. Who feels this is worth changing in 1.9?

-J=FCrgen

--=20
 The box said it requires Windows 95 or better so I installed Linux

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