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digitalmars.D.bugs - [Issue 3025] New: uniform(float,float) pops first, uniform(int,int) pops last

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=3025

           Summary: uniform(float,float) pops first, uniform(int,int) pops
                    last
           Product: D
           Version: 2.030
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: bugzilla digitalmars.com
        ReportedBy: lio+bugzilla lunesu.com


I noticed in random.d, uniform template, that popFront is called in different
locations for integral compared to floating point types: for integral types you
.front first and .popFront afterwards, but for floating point types you start
with .popFront and then check .front.

This has a peculiar effect: for example, if you do uniform(0.0,100.0) followed
by uniform(0,100) there's a big chance that the integral part of the first
random number is equal to the second random number.

import std.stdio, std.random;
void main()
{
 writeln(uniform(0.0,100.0));
 writeln(uniform(0,100));
}

The location of .popFront should be standardized, either before or after any
.front.

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=3025


Andrei Alexandrescu <andrei metalanguage.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |andrei metalanguage.com
         AssignedTo|bugzilla digitalmars.com    |andrei metalanguage.com




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prev sibling parent d-bugmail puremagic.com writes:
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Andrei Alexandrescu <andrei metalanguage.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED




--- Comment #1 from Andrei Alexandrescu <andrei metalanguage.com>  2009-08-27
22:23:09 PDT ---
I always call popFront at the end now.

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