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by: J. C. O'Connell |
last post by:
hi,
I HAVE A TEXT BOX THAT I WANT THE USER TO ENTER A NUMBER IN.
HOW DO I PREVENT RUN TIME ERROR IF THEY ENTER A STRING INSTEAD?
I GUESS I NEED SOME TYPE OF DATA TYPE SENSING COMMAND BUT I
DONT KNOW WHAT IT IS.
jco
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by: willie |
last post by:
Hi,
I'm writing a program which requires the use of three serial ports and
one parallel port. My application has a scanning devices on each port,
which I can access fine with pyserial. However, I'm unsure of how
exactly I should be designing the program, I thought I could use
threading to start class:
class scanner(Thread):
def __init__(self,port):
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by: Jacek Dziedzic |
last post by:
Hi!
I'm trying to make friends with exceptions. I think I'm doing well,
there is
one thing that bothers me, however. If an object is declared within a try
block, it gets destroyed on exception, because then we're into the catch
block and out of the try block, right? How can I sense in the destructor
that we're in the middle of processing an exception (and hence take
appropriate action, like not destroying the object if some...
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by: SH |
last post by:
I wish to create a program (really a Windows Service) that sits and
waits for a client PC to communicate with it, but I can't come up with a
good method of doing so.
I want to have a service running on a server, waiting for clients to
send it commands. The service would then do something based on the
command and send the information back to the client. This is exactly
what any database does. What is the best method for doing this?
The...
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by: John Salerno |
last post by:
Just a quickie for today: Is it common (and also preferred, which are
two different things!) to create a function that has the sole job of
calling another function?
Example: for fun and exercise, I'm creating a program that takes a quote
and converts it into a cryptogram. Right now I have four functions:
convert_quote -- the main function that starts it all
make_code -- makes and returns the cryptogram
make_set -- called from...
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by: astolpho |
last post by:
I am using a slightly outdated reference book on J2EE programming. It gives 2 methods of creating a database used in its casestudies. The first is an ANT script that gives the following output:
D:\original\CaseStudy-2-5\CaseStudy\Day02\exercise>asant database
Buildfile: build.xml
env-user:
prop-user:
set-user:
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by: terry |
last post by:
Hi,
I am trying to send a character to '/dev/ttyS0' and expect the same
character and upon receipt I want to send another character. I tired
with Pyserial but in vain.
Test Set up:
1. Send '%' to serial port and make sure it reached the serial port.
2. Once confirmed, send another character.
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by: John Salerno |
last post by:
Let me see if this question even makes sense...I'm reading Core Python
Programming and I jumped ahead to the more specific topics like network
programming. I plan to follow along with the example in that chapter and
create a socket connection between my desktop and laptop.
However, these two computers are already connected on my home network
(using the Windows Network Setup Wizard), so I was wondering if this
will have any effect on what...
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by: Blip |
last post by:
Hello -
I'm trying to wite these control characters to the serial port w/o
success.
I've tried sp.Write((Keys.ControlKey & Keys.X).ToString());
sp.Write((Keys.Control & Keys.X).ToString());
char temp = { Convert.ToChar(Keys.Control), Convert.ToChar(Keys.X)
};
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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...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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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: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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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...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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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: 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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