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newLISP Fan Club

Forum => So, what can you actually DO with newLISP? => Topic started by: newdep on October 10, 2005, 06:07:05 AM

Title: 5 Cents for today..
Post by: newdep on October 10, 2005, 06:07:05 AM
I posted some scripts again at http://nodep.nl/newlisp/index.html



If you like to see your PC work?! use the Latin Square script ;-)



Enjoy, Norman.
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Post by: Lutz on October 10, 2005, 06:52:21 AM
Beautiful the latin square, even the fan in my Mac Mini came on trying a 9-square ;), playing with this thing is addictive.



Lutz
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Post by: newdep on October 10, 2005, 06:59:21 AM
hehe..Its a load indeed... And im still running a Square 15..dont think that will finish today tough ;-)
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Post by: Fanda on October 11, 2005, 12:41:39 AM
Nice!  ;-)



There is an interesting case:

Latin Square needs 'randomize' to return ALL possible variants of sequence, which means even the SAME sequence.



This case (and similar ones) will never get solved (infinite loop):
Code Select
--- Running!

(2 3 1)
(3 1 2)


Lutz - could we get optional parameter in 'randomize'?

=> (randomize '(1 2 3) true)  => '(1 2 3)

=> returns ALL possible variants, INCLUDING the SAME sequence



... I feel kinda stupid now, when I proved that randomize (or shuffle :-) will sometimes return the same sequence, than we repaired it and now I would like to have a parameter to return the same sequence again :-)))



Fanda
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Post by: Fanda on October 11, 2005, 12:52:32 AM
ps: We could also vote if optional 'true' means ALL or (ALL except the SAME). If it's not too late...



Fanda
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Post by: Lutz on October 11, 2005, 03:51:07 AM
let's go with 'true' for randomizing with repetition



Lutz
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Post by: newdep on October 11, 2005, 05:08:16 AM
So that means the current random  functions are unique?



Cant we better change the 'seed behaviour instead?



Regards, Norman.
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Post by: newdep on October 11, 2005, 05:22:37 AM
Mmmm also intresting is that i dont have this (1 2 3) problem on my linux machine but i do have it on my windows XP machine....



???
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Post by: Fanda on October 11, 2005, 11:43:34 AM
Current 'randomize' never returns the same sequence (and you usually want this).



Try this test:
Code Select
; TEST for randomize
(setq L '(1 2 3))
(setq r '())
(dotimes (x 10000)
  (push (randomize L) r))

(setq r (unique r))

(println r)
(if (find L r)
  (println "ERROR!")
  (println "OK!"))


You shouldn't find '(1 2 3) in the result.



Fanda
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Post by: newdep on October 11, 2005, 11:53:00 AM
This Unique random issue...Intresting because I have here a program that checks on UniqueNess inside my codebase and i failed so far ( that explains more then my assumption that the total of random occeurenances still had to come ;-)...



So when was this changed? (I like this unique option saves me some work..)



I first thought it was related to the 'Seed ..but its not..not even wehn you place a new 'seed inside the loop...Mmm funny that i did not notice this..



Happy that this was brought up...



By the way..it also fails on linux.. (correction on the above)



Regards, Norman.
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Post by: Fanda on October 12, 2005, 12:09:38 AM
I am not sure, if I understand...



The only thing is: 'randomize' function without that optional 'true' will mix the output list as long as it is the same as the input list - you always get something different than you started with.

If you use optional 'true' (useful only in the next version of newLISP) you get all the cases possible - even the same list you started with.



Fanda
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Post by: newdep on October 12, 2005, 02:35:43 AM
Ah yes I overlooked this in the manual

-> randomize will always return a sequence different from the previous one.
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Post by: Fanda on October 15, 2005, 01:39:15 PM
Now, just add the 'true' to randomize functions :)



Fanda
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Post by: Lutz on October 15, 2005, 01:54:59 PM
The 'true' flag in 'randomize' is already there, see the manual ;)



Lutz
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Post by: Fanda on October 15, 2005, 01:57:42 PM
PS: My favorite game:  http://www.planarity.net/
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Post by: newdep on October 15, 2005, 02:51:58 PM
Aaa nice... Lets have a look at it, seems intresting game ;-)



Yes the "true is in it ;-) Runs great now ;-) Thanks!
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