Re: AW: random number generator

[Dale Anson]

Yet another option, use the math task from antelope 
(http://antelope.tigris.org).  Here's an example from the docs:

   <!-- demo calculating a random number between 0 and 100 -->
   <math result="result">
       <op op="rint">
           <op op="*">
               <num value="100"/>
               <op op="random"/>
           </op>
       </op>
   </math>
   <echo>a random number between 0 and 100: ${result}</echo>

Dale


[EMAIL PROTECTED] wrote:
<project>
    <tempfile property="temp.dir"/>
    <mkdir dir="${temp.dir}"/>
</project>    

Jan 

  
-----Ursprüngliche Nachricht-----
Von: Mario Madunic [mailto:[EMAIL PROTECTED] 
Gesendet: Samstag, 21. Juli 2007 16:25
An: Ant Users List
Betreff: Re: random number generator

Thank you Gilbert,

it works like a charm.

Mario

Quoting Gilbert Rebhan <[EMAIL PROTECTED]>:

    
Hi,

Mario Madunic wrote:
      
Hi,

I'm trying to generate a random number to be used as a 
        
temporary directory
    
name
      
through a multi step xslt process. I'm using Ant 1.6.5 and 
        
Java 1.6.0-b105
    
I receive the following error

   [random] Jul 20, 2007 9:11:27 PM org.apache.bsf.BSFManager exec
   [random] SEVERE: Exception :
   [random] java.security.PrivilegedActionException:
org.apache.bsf.BSFException: JavaScript Error: Internal Error:
org.mozilla.javascript.EcmaError: ReferenceError: "self" 
        
is not defined.
    
if you're already use BSF with <script> task i would recommend
JRuby, get the JRuby.jar from =

http://dist.codehaus.org/jruby/jruby-complete-1.0.jar

so it's a simple as =

<target name="depends">
   <script language="ruby">
   <![CDATA[
     $project.setProperty "myrand", rand(4711).to_s
   ]]>
   </script>
</target>

<target name="main" depends="depends">
   <echo>
     $${myrand} == ${myrand}
   </echo>
</target>

main:
      [echo] ${myrand} == 718
BUILD SUCCESSFUL
Total time: 1 second

Just put an integer to the Kernel#rand method.
If you want a floating point number, just use
rand without (integer) =

<script language="ruby">
   <![CDATA[
     $project.setProperty "myrand", rand.to_s
   ]]>
  </script>


Regards, Gilbert

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