pinard at iro.umontreal.ca
Wed Feb 23 04:08:08 CET 2000
neelk at brick.cswv.com (Neel Krishnaswami) écrit:
> Whenever I have code that needs to be thread-safe, I find it tons easier
> to write in a functional style than worry about locking and race conditions
> and reentrancy and awful things like that.
I see. Thanks for the hint. I might use it one day...
> > P.S. - Yes, I know it has been theoretically proven that we could design
> > computers needing no energy, if we could fully avoid side-effects, but I
> > beg to do not consider this a practical advantage yet. :-)
> Actually, this *isn't* so!
Oh, this was proven in the field of quantic computing, if I remember what
I've heard. I'm not especially knowledgeable in either thermodynamics
nor quantum physics, so I'm not going to argue either way!
> Here's the critical bit: this means that resetting those bits
> decreased the information in the system!
Resetting a bit _is_ a side effect. The statement was that that a computing
device might use zero energy if without side effects. Surely not a
P.S. - Thanks for the entertainment in your previous message! :-)
François Pinard http://www.iro.umontreal.ca/~pinard
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