[fpc-pascal] mirror freepascal.stack.nl down
One of the FPC mirrors "freepascal.stack.nl" is currently being migrated to a new vm. I hope access will be restored within hours. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
[fpc-pascal] Bug in documentation for Random?
http://www.freepascal.org/docs-html/current/rtl/system/random.html "Random returns a random number larger or equal to 0 and strictly less than L" However random(a negative number) returns a number <= 0 and > L program r; begin randomize; writeln('Random(-10) = ',Random(-10)); end. C:\Users\Bart\LazarusProjecten>test random(-10) = -1 C:\Users\Bart\LazarusProjecten>test random(-10) = -4 Maybe my understanding of English ("strictly less than") is not correct, so I ask here before posting as a bugreport. Bart ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Bug in documentation for Random?
El 05/04/2017 a las 18:09, Bart escribió: > http://www.freepascal.org/docs-html/current/rtl/system/random.html > > "Random returns a random number larger or equal to 0 and strictly less than L" > > However random(a negative number) returns a number <= 0 and > L > > > program r; > begin > randomize; > writeln('Random(-10) = ',Random(-10)); > end. > > C:\Users\Bart\LazarusProjecten>test > random(-10) = -1 > C:\Users\Bart\LazarusProjecten>test > random(-10) = -4 > > Maybe my understanding of English ("strictly less than") is not > correct, so I ask here before posting as a bugreport. I've never used negative values, so this is just a guess: random(+10) will output numbres 0..9 random(-10) will output numbres -9..0 so, it is equivalent to -random(10) -- Saludos Santi s...@ciberpiula.net ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Bug in documentation for Random?
Il 05/04/2017 18:09, Bart ha scritto: http://www.freepascal.org/docs-html/current/rtl/system/random.html "Random returns a random number larger or equal to 0 and strictly less than L" However random(a negative number) returns a number <= 0 and > L program r; begin randomize; writeln('Random(-10) = ',Random(-10)); end. C:\Users\Bart\LazarusProjecten>test random(-10) = -1 C:\Users\Bart\LazarusProjecten>test random(-10) = -4 Maybe my understanding of English ("strictly less than") is not correct, so I ask here before posting as a bugreport. My scant knowledge of English leads me to believe that the sentence should be rephrased in order to cover the negative numbers case: either: Random return a random number with the same sign of L, and whose absolute value is larger or equal to zero and strictly less than the absolute value of L. or: Random return a random number in the range 0 (included) to L (excluded). Just my 2c. Giuliano ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Bug in documentation for Random?
On 4/5/17, Santiago A. wrote: > random(-10) > will output numbres -9..0 That was not realy the question. The question is wether the documentation is wrong, or the implementation or neither. B.t.w. Delphi7 gives me: Random(-10) = -776108169 Random(-10) = 244426112 Random(-10) = -1774796928 Random(-10) = 1443026331 Random(-10) = -919853036 Random(-10) = -747947900 Random(-10) = -1767321924 Random(-10) = -2114448955 Random(-10) = 1499268340 Random(-10) = -1658783534 (which makes no sense at all to me...) Bart ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Array clearing
On 05/04/17 04:49, Ryan Joseph wrote: Yeah after all this talk, I’m going to use array[0..0, 0..0, 0..0] and allocate the memory myself to avoid overhead and confusion. Thanks for explaining everything to me but this time going low level makes the most sense. Then you lose the ability to turn on range checking in your program, since any access with an index greater than 0 will cause an error. Jonas ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Bug in documentation for Random?
Fun fact: TP's random used an unsigned parameter (word), so no ambiguity there. Random (function) -- Returns a random number. Declaration: function Random [ ( Range: Word) ]: < Same type as parameter >; Bart ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Bug in documentation for Random?
http://docwiki.embarcadero.com/RADStudio/Tokyo/en/Random "random returns a random number between 0 and abs(num-1)" IIUC, then Random() shoud always return a positive number. Bart ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Bug in documentation for Random?
Usualy "non-negative", not positive ! Cheers, Ched' Le 05.04.2017 à 16:55, Bart a écrit : http://docwiki.embarcadero.com/RADStudio/Tokyo/en/Random "random returns a random number between 0 and abs(num-1)" IIUC, then Random() shoud always return a positive number. Bart ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal