Dear all,
this is my first mail to this mailing list, I'm not sure this is the
correct one to post this topic.
I noticed a strange behavior of the format function. I'm not sure it can
be considered as a bug.
If I use
format('%.3f', [-0.0001])
the resulting string is
-0.000
and not
0.000
Why?
Michael Van Canneyt wrote:
Because your number is negative... The original number is taken to decide
whether it should put the - sign or not. What does delphi do ?
Michael.
___
Delphi gives 0.000 as result.
a.
Using round function I implemented the RoundTo function as in Delphi:
type
TRoundToRange = -37..37;
function RoundTo(const AValue: Double; const ADigit: TRoundToRange): Double;
var
LFactor: Double;
begin
LFactor := IntPower(10, ADigit);
Result := Round(AValue / LFactor) * LFactor;
end;
In
Jonas Maebe wrote:
Not only that, but -0.000 is different from 0.000 (at least for the fpu)
Jonas
In a mathematical way of view I think that -0.000 has no meaning.
If I round something and the resulting value is zero, well zero is zero.
Not +0 or -0.
a.
tested it on Win32 using lazarus:
Lazarus 1.0.13 r42910M FPC 2.6.2 i386-win32-win32/win64
Could you please let me know if you can reproduce it or if I am doing
something wrong?
Best regards,
Andrea Mauri
--
Dr. Andrea Mauri, PhD
Milano Chemometrics and QSAR Research Group
Department
FPC 2.6.2 i386-win32-win32/win64
Could you please let me know if you can reproduce it or if I am doing
something wrong?
Best regards,
Andrea Mauri
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any hint?
should I have to open a bug report?
Il 31/10/2013 16:23, Andrea Mauri ha scritto:
Dear All,
I am using TBits object but I found some errors using it. Before adding
a bugreport to the bugtracker I would be sure that there is nothing that
I am doing wrong.
Below a small procedure
If you send a minimal test-case and actual results you might have a
better chance at getting a reply...
Below a sample test project.
I create a TBits (b1) and then I set 16 bits as 1. Then I create 2 TBits
(b2 and b3) with size 164, I use .OrBits to OR b1 with b2 and b3. I
expect that
Il 06/11/2013 18:41, Tomas Hajny ha scritto:
Yes, I think so (although I have no clue regarding compatibility with
Delphi, etc.) - looking at the implementation of OrBits (and also
XorBits), the calculation which bits should be used is different from
AndBits (and probably wrong - it checks if
Dear all,
I developed an application using LazOpenGLContext, one of the
application user reported me that he got an error:
gdk_gl_context_share_new no visual found.
Could you help me trying to identify the problem?
What may I ask to better understand the problem and how to solve it?
Andrea
as samevalue(a, 44). But I am not
sure since I did only few tests.
Could you please provide some explanations? Why the two different
behaviours? How should I use samevalue?
Let me know and best regards,
Andrea Mauri
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thanks.
Il 30/09/2015 13:18, Jonas Maebe ha scritto:
PS: please don't cross-post to multiple lists.
my fault.
andrea
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one more thing.
there is a method like clearall to set all bits to 1?
clearall is much more faster then a simple iteration along all bits
Il 31/03/2017 14:07, Andrea Mauri ha scritto:
I didn't understand how TBits.NotBits works.
Consider the following code:
b:= TBits.Create(NRECORDS
Am I missing something?
Thank you.
Andrea Mauri
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any answer?
I asked in the wrong place?
where should I ask?
Il 31/03/2017 14:10, Andrea Mauri ha scritto:
one more thing.
there is a method like clearall to set all bits to 1?
clearall is much more faster then a simple iteration along all bits
Il 31/03/2017 14:07, Andrea Mauri ha scritto:
I
AFAIK a.NotBits(b) means (a and not b):
a b result
0 0 0
0 1 0
1 0 1
1 1 0
Mattias
Thank you Mattias.
It works as you described.
Anyway, since ClearAll, AndBits, OrBits etc works iterating on
FBits : ^TBitArray;
they are much faster then the simple iteration along property
property Bits[Bit:
.
Is it possible to introduce a SetState procedure?
Thanks again,
Andrea Mauri
Il 31/03/2017 14:10, Andrea Mauri ha scritto:
one more thing.
there is a method like clearall to set all bits to 1?
clearall is much more faster then a simple iteration along all bits
Il 31/03/2017 14:07, Andrea Mauri ha scritto
Dear all,
if TStringList sort will be changed, please take into account the issue
related to randomised pivot initialisation in TStringList sort and the
consequences to Random sequence (
http://forum.lazarus-ide.org/index.php?topic=43257.0).
Andrea
Il giorno ven 30 nov 2018 alle ore 09:15
Submitted as: 0038734 (https://bugs.freepascal.org/view.php?id=38734)
On Fri, 9 Apr 2021 at 09:11, Michael Van Canneyt
wrote:
>
> Hello,
>
> Can you please post this in the bugtracker ?
> So it will not be forgotten.
>
> Michael.
>
> On Thu, 8 Apr 2021, Andre
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