Changed sender name from screen name to real name.
On Thu, 23 Apr 2009 02:55:37 +0900, Steven Schveighoffer
<[email protected]> wrote:
On Wed, 22 Apr 2009 13:49:18 -0400, Andrei Alexandrescu
<[email protected]> wrote:
tama wrote:
On Mon, 20 Apr 2009 16:09:09 +0900, Walter Bright
<[email protected]> wrote:
This is a major revision to Phobos, including Andrei's revolutionary
new range support.
http://www.digitalmars.com/d/2.0/changelog.html
http://ftp.digitalmars.com/dmd.2.029.zip
Range is so cool!
Though...
I tried following code:
void main()
{
writeln("Case1");
{
Mt19937 gen = Mt19937(0);
writeln(gen.front);
gen.popFront;
writeln(gen.front);
}
writeln("---");
{
Mt19937 gen = Mt19937(0);
advance(gen, 1); // skip 1 element
writeln(gen.front);
gen.popFront;
writeln(gen.front);
}
writeln("\nCase2");
{
Mt19937 gen;
writeln(gen.front);
gen.popFront;
writeln(gen.front);
}
writeln("---");
{
Mt19937 gen;
advance(gen, 1); // skip 1 element
writeln(gen.front);
gen.popFront;
writeln(gen.front);
}
}
Result:
Case1
2357136044 (1)
2546248239 (2)
---
2546248239 (2)
3071714933 (3)
Case2
581869302 (1)
3890346734 (2)
---
581869302 (1)?
3890346734 (2)?
I think 'Case1' is correct, but 'Case2' is wrong.
Mt19937's bug?
If you initialize the Mersenne twister with no seed it will start with
seed 5489u.
I think his point is in the second part of Case2, he skipped one
element, but it appears that it didn't skip anything.
Thanks for your comment.
Lack of talk about this problem:|
--
tama <[email protected]>
http://profile.livedoor.com/repeatedly/
