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Subject: Re: 64-Bit random numbers

Author: Robert Hyatt

Date: 20:07:44 11/02/03

Go up one level in this thread


On November 02, 2003 at 22:14:22, Johan de Koning wrote:

>On November 01, 2003 at 18:32:08, Robert Hyatt wrote:
>
>>On November 01, 2003 at 05:00:48, Johan de Koning wrote:
>>
>>>On October 31, 2003 at 10:27:00, Robert Hyatt wrote:
>>>
>>>>On October 31, 2003 at 01:36:17, Johan de Koning wrote:
>>>>
>>>>>On October 30, 2003 at 09:44:48, Robert Hyatt wrote:
>>>>>
>>>>>>On October 29, 2003 at 13:39:03, Vincent Diepeveen wrote:
>>>>>
>>>>>>>It's like saying using 'goto' is ok in a programming environment. Where this is
>>>>>>>certainly true, it should not be a policy to do so :)
>>>>>>
>>>>>>Eh?  _every_ program you write has goto's.  (aka jumps).  They are not
>>>>>>bad.  In fact, they are _unavoidable_.
>>>>>
>>>>>OT1: They *are* avoidable.
>>>>>Any finite algorithm that does not depend on mid-execution input (typically
>>>>>time) can be written as 1 single expression. It would of course be huge and
>>>>>run rather slowly without quantum computing.
>>>>
>>>>I don't know how you can possibly encode a loop into a complex expression,
>>>>not knowing beforehand how many loop iterations will be needed...
>>>
>>>By expanding all possibilities.
>>
>>What if you don't know how many possibilities there are. IE repetition
>>checking.  Etc..
>
>If *all* possibilities is finite, you know how many.
>
>#define REP \
>    (zob[0] == zob[-4]) \
>  + (zob[0] == zob[-6]) \
>  + (zob[0] == zob[-8]) etc

OK.. I can see how it would work, but not as above.  Each zob[x] has
to be protected by something like this:

(moves_in_replist>=4) * (zob[0] == zob[-4])

However, most compilers will wreck there and crash the program.  IE
it doesn't always work to do x[y-j] where j > y.  So the subscripts
have to be done the same way...

ugly.  very ugly...


>
>#define EVAL \
>  + ISWEAKWP(d4) * -10 \
>  + ISWEAKBP(d5) *  10 \
>  + many more
>
>#define SCORE (REP < 3) * EVAL + (REP >= 3) * DRAWSCORE
>
>// Johan



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