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by: Christian Stork |
last post by:
Hello everybody,
I am using Python to prototype a compression algorithm for tree-shaped
data, e.g., XML data or abstract syntax trees. I use a variant of the
visitor design pattern--called weaver/yarn pattern--in order to
traverse the tree that is being compressed or decompressed. I do not
know of any other interesting application of the weaver/yarn pattern,
but it seems like a very suitable subject of study for different...
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by: Yoon Soo |
last post by:
Hi, there
in the code below I am not sure, if the two 'big' for-loops are
redundabt in some way. Could this be made also in one loop and would
this make sense?
Another question is,if I should implement the maps as bitmaps. (Pro &
Contra..on a very first sight, it looked to me, as if the implemention
as bitmap would be some more work).
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by: FluffyCat |
last post by:
New on November 28, 2005 for www.FluffyCat.com PHP 5 Design Pattern
Examples - the Visitor Pattern.
In the Visitor pattern, one class calls a function in another class
and passes an instance of itself. The called class has special
functions for each class that can call it.
With the visitor pattern, the calling class can have new operations
added without being changed itself.
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by: FluffyCat |
last post by:
New on November 29, 2005 for www.FluffyCat.com PHP 5 Design Pattern
Examples - the Command Pattern.
Since you all enjoyed the Visitor Pattern so much yesterday, today I
have the Command Pattern for you. This one is pretty straight
forward. In the Command Pattern an object encapsulates everything
needed to execute a method in another object.
http://www.fluffycat.com/SDCMSv2/PHP-Design-Patterns-Command/
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by: FluffyCat |
last post by:
Last month I continued my series of design patterns examples using PHP
5 with the Observer Pattern and the Prototype Pattern. Here now is my
16th example, the Adapter pattern.
http://www.fluffycat.com/PHP-Design-Patterns/Adapter/
In the Adapter Pattern we adapt a class we have to provide methods
another class needs, without changing the original class.
If you work with a lot of classes that you can not change, then this
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by: dave.dolan |
last post by:
Basically I'd like to implement the composite design pattern with leaves that
are either of reference or value types, but even using generics I can't seem
to avoid boxing (using ArrayList or Object)
Is this even possible, or is the composite pattern doomed to use the
System.Object type forever?
I have tried using interfaces with generics, but I always stumble on the
Value property (when trying to return the value of a particular node)
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by: Ole Nielsby |
last post by:
First, bear with my xpost. This goes to
comp.lang.c++
comp.lang.functional
with follow-up to comp.lang.c++
- I want to discuss an aspect of using C++ to implement a
functional language, and I'd like the attention of fp as well
as C++ gurus if available.
The language I'm implementing - PILS - is dynamically
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by: Diego Jancic |
last post by:
Hi!
Hope you can help my with you issue...
I made a domain model (http://cedev.com.ar/model.jpg) and what I'm
trying to is the NHibernate mappings to persist it. (It's uses the
Decorator Pattern, of course..)
It's importante to know that a Person might be a Student and a Tutor
at the same time (that's why it's not a simple inheritance)
I created a table for ConcretePerson, another one for SystemUser (only
with the Id), other for Tutor...
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by: Alan Isaac |
last post by:
I have two questions about the "observer pattern" in Python.
This is question #1. (I'll put the other is a separate post.)
Here is a standard example of the observer pattern in Python:
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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: 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: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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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...
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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: 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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