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by: matthias_k |
last post by:
Hi,
I am currently implementing a solver for linear optimization problems
using the revised simplex method and I stumbled accross some strange
behavior regarding the treatment of the number 0.
I am not sure whether this is compiler or language related though.
The first problem is, that there are two representations of zero, namely
+0 and -0. Does IEEE for floating points allow this? Maybe I didn't
activate IEEE floating point numbers?
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by: Sean C. |
last post by:
Helpful folks,
Most of my previous experience with DB2 was on s390 mainframe systems
and the optimizer on this platform always seemed very predictable and
consistent. Since moving to a WinNT/UDB 7.2 environment, the choices
the optimizer makes often seem flaky. But this last example really
floored me. I was hoping someone could explain why I get worse
response time when the optimizer uses two indexes, than when it uses
one. Some context:
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by: Francois Vanderseypen |
last post by:
This nested 'for' gives an out of range error on the second pass of the
second loop, though it looks allright. Isn't it wierd?
for (int tel1=0;tel1<3;tel1++)
{
for (int tel2=0;tel2<15;tel2++)
{
p=tel2;
}
}
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by: Jan Killian |
last post by:
Hi all,
maybe you'll see the trick and could help me. I am passing int by
reference and get an exception when using it as an index to passed
array. (Yes I know I can workaround with object encapsulation, but
wish to understand this). Thanks, Jan
using System;
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by: Gérard Talbot |
last post by:
Hello fellow colleagues,
Can someone explain to me why, in this page
http://www.aplus.co.yu/css/z-pos/index4.php#content ,
AP1 should not be in front of (overlapping) AP2 ?
Recap:
RP1 is relatively positioned block, with z-index:11
AP1 is an absolutely positioned block, with z-index:10, nested inside RP1
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by: Cyberwolf |
last post by:
Is there a way to set a primary index to ignore Nulls and if so how
would I do it. I have already tried setting it so it is not a required
field, but that does not work. It states that the field can not
contain null values.
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by: Daniel Vukadinovic |
last post by:
I want to implement an index/counter to my linked list.
Why? I wrote a search function which searches the list for elements
based on their values (say I add an element and I assign the value 54
and the next element 789 and so on...) now I'd like to write a search
function which would search the list for elements based on their index.
Say first element is 54 and index 1, second element is 789 and index 2
so when I want to search, I'll do...
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by: john |
last post by:
Last week I posted about making a unique index on multiple fields to prevent
importing identical records twice. I still have trouble with the nulls in
the index. The only way that I can make it work is to make all the index'
fields required fields and set the allow nulls setting to false. But then
every field in the index should always have some kind of value, and I have
to put a default value like "0" in them or "empty". Is this indeed the...
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by: Hallvard B Furuseth |
last post by:
As far as I can tell, (x & -1) is nonzero if the integer x is
negative zero. So for signed types, x == 0 does not guarantee
(x & foo) == 0. Is that right? (Not that I expect to ever
encounter a non-two's-complement machine. Just wondering.)
--
Hallvard
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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