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by: oom |
last post by:
I am a bit of a newbie when it comes to python, when working with
lists today I noticed some very odd behaviour, any suggestions
welcome:
Python 2.2.3 (#1, Nov 6 2003, 14:12:38)
on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> firstlist=
>>> secondlist=firstlist
>>> print (firstlist,secondlist)
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by: dasod |
last post by:
I would like to know if my method to remove list objects is correct in
this small test program. It seems to me that there might be a simplier
way, but I'm afraid I don't know enough about list iterators and how
they are behaving in situations like this.
#include <iostream>
#include <list>
class Test;
typedef std::list< Test* > Tlist;
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by: JustSomeGuy |
last post by:
I have an stl list that grows to be too huge to maintain effectivly in
memory.
There are elements within the list that could be stored on disk until
accessed.
However I don't want to expose this to the application class.
How can I extent the stl list to write some elements to disk when they
are put in the list
and read them from disk when they are read from the list.
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by: Glen Able |
last post by:
Hi,
I have a collection of lists, something like this:
std::list<Obj*> lists;
Now I add an Obj to one of the lists:
Obj* gary;
lists.push_front(gary);
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by: Christoph Zwerschke |
last post by:
Ok, the answer is easy: For historical reasons - built-in sets exist
only since Python 2.4.
Anyway, I was thinking about whether it would be possible and desirable
to change the old behavior in future Python versions and let dict.keys()
and dict.values() both return sets instead of lists.
If d is a dict, code like:
for x in d.keys():
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by: Little |
last post by:
I have this program and I need to work on the test portion, which tests
if a Val is in the list. It returns false no matter what could you look
at the part and see what might need to be done to fix it. It reads in
the file and sorts out the files into the four different lists.
F.txt
int main
2
" "
help
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by: Ville Vainio |
last post by:
I tried to clear a list today (which I do rather rarely, considering
that just doing l = works most of the time) and was shocked, SHOCKED
to notice that there is no clear() method. Dicts have it, sets have it,
why do lists have to be second class citizens?
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by: Jimp |
last post by:
Why can't I cast List<MyObject> to ICollection<IMyObject>.
MyObject implements IMyObject, and of course, List implements
ICollection.
Thanks
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by: Macca |
last post by:
Hi,
My app needs to potentially store a large number of custom objects and be
able to iterate through them quickly. I was wondering which data structure
would be the most efficient to do this,a hashtable or a generic list.
Is using enumerators to iterate through the data structure a good idea?
I'd appreciate any suggesstions or advice,
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by: Amit Bhatia |
last post by:
Hi,
I am not sure if this belongs to this group. Anyway, my question is as
follows: I have a list (STL list) whose elements are pairs of integers (STL
pairs, say objects of class T). When I create a new object of class T, I
would like to check if this object already exists in the list: meaning one
having same integers. This can be done in linear time in a list, and
probably faster if I use STL Set instead of list. I am wondering however if...
|
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...
|
| |
by: jinu1996 |
last post by:
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by: Hystou |
last post by:
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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: 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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by: bsmnconsultancy |
last post by:
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