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Re: Random numbers in functions

X-seq: zsh-users 12246
From: Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx>
To: zsh-users@xxxxxxxxxx
Subject: Re: Random numbers in functions
Date: Tue, 20 Nov 2007 19:49:03 +0000
In-reply-to: <Pine.GSO.4.61.0711201411140.5718@xxxxxxxxxx>
Mailing-list: contact zsh-users-help@xxxxxxxxxx; run by ezmlm
References: <200711201823.lAKIN5oM011816@xxxxxxxxxxxxxx> <Pine.GSO.4.61.0711201411140.5718@xxxxxxxxxx>

On Tue, 20 Nov 2007 14:30:39 -0500 (EST)
Justin M Wozniak <jwozniak@xxxxxxxxxx> wrote:
> Thanks!  But since I'm planning to obtain many random numbers I'd like to 
> do this without file operations.  Using a global variable should be 
> equivalent to your solution but the output of rand48() seems to be 
> convergent.

I thought your problem was that you were running stuff in different
shells or subshells or something.  However, as you're not, it seems
likely you're running across a bug:

2004-06-08  Peter Stephenson  <pws@xxxxxxxxxxxxxxxxxxxxxxxx>

	* 20029: Src/Modules/mathfunc.c: rand48(seed) stopped being
	random after the second call.

That was fixed a while ago, however; it should even be in the current 4.2.x
version.

-- 
Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx>
Web page now at http://homepage.ntlworld.com/p.w.stephenson/

References:
- Re: Random numbers in functions
  - From: Peter Stephenson
- Re: Random numbers in functions
  - From: Justin M Wozniak

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