Subject: Re: [xsl] Random number seed generation From: Wolfgang Laun <wolfgang.laun@xxxxxxxxx> Date: Thu, 9 Dec 2010 16:00:07 +0100 |
Out of curiosity: Usually, a random generator's seed needs only one setting so that you get different sequences with different program runs. Resetting the RG with a different seed every now and then isn't bound to make the sequence any "randomer". So why? -W On 9 December 2010 15:04, Michel Hendriksen <michel.hendriksen@xxxxx> wrote: > > Hi all, > > I'm using Saxon9he processor XSLT 2.0, and I am trying to get some > random numbers. I'm currently using fxsl/random for this. The problem > is that it needs a seed. > I tried using current time stuff but that doesn't change during the > transfomation using the stylesheet.. So I tried an extension function > to cal to Java but that doesn't seem to work. Examples are probably > XSLT 1.0 but should be ok. > > Is this possible on Home Edition? Did things change in transition to > 2.0? Is there an other way to get some seed for the random function? I > can't resuse the value as I would have to keep it somewhere in between > calls. One idea would be to use generate-id() but that gives a string. > Could be useful when this is always convertible to a number. > > I'm running the processor from a Java application now. It is a > learning project and should be able to run Genetic Algorithm > functionality, so lots of random stuff is needed. > > Tried: > > <xslt:value-of select="math:sqrt(10)" xmlns:math="java:java.lang.Math"/> > > <xslt:variable name="date" select="date:new()" > xmlns:date="java:java.util.Date"/> > > As samples for getting something but errors are: > > Error at xslt:value-of on line 62 column 74 of selector.xsl: > XPST0017: XPath syntax error at char 13 on line 62 in {math:sqrt(10)}: > Cannot find a matching 1-argument function named {java:java.lang.Math}sqrt() > Error at xslt:variable on line 64 column 83 of selector.xsl: > XPST0017: XPath syntax error at char 10 on line 64 in {date:new()}: > Cannot find a matching 0-argument function named {java:java.util.Date}new() > > > Michel Hendriksen
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