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by: Dave |
last post by:
Hello all,
I'm pondering why the default underlying container for std::priority_queue<>
is std::vector<>. It would seem that inserts are liable to happen anywhere,
which would make std::list<> a superior alternative. Why factors am I not
considering here? Why in the general case would std::vector<> be best?
Thanks,
Dave
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by: Tino |
last post by:
In using std::priority_queue, I'm concerned about the expense of
memory allocation and copying as the priority_queue grows large.
std::vector has reserve() to address this concern, though there
doesn't seem to be anything like this for priority_queue. Also, I
don't know anything about how priority_queue is implemented
(specifically, MSVC++...
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by: zl2k |
last post by:
hi, all
Here is what I want to do: to wrap my self defined class in a
shared_ptr and then insert it into the priority_queue. The
priority_queue should pump the least element of the self defined class
first. To make it simple, here is the toy code.
myClass.h
------------------------------------------
#ifndef MYCLASS_H
#define MYCLASS_H
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by: Henning Hasemann |
last post by:
I'm using a stl-priority queue and want
- find out if a certain item is contained in the queue
- to be able iterate over all items without having to pop() them, order
does not matter.
I couldnt find methods for these which suprises me as both should be
easily solvable with access to the underlying vector.
Did I just miss these methods?...
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by: J.M. |
last post by:
I would like to use a data structure (e.g. from the STL) that always allows
me to retrieve the largest element. (I want to push in elements, and remove
the largest, push in further elements, etc.) It seems a priority_queue from
the STL would work fine. However at some point, I am finished (even though
the queue is not empty) and want to throw...
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by: Eric Lilja |
last post by:
Hello, I have a the following priority_queue: priority_queue<pair<int,
string pq;
AFAICT, priority_queues doesn't support iterators. My question: is
there a way to print its contents without emptying it?
Right now I'm using the following code:
while (!pq.empty())
{
cout << setw(3) << pq.top().first << ": " << pq.top().second <<
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by: thomas |
last post by:
priority_queue usually uses the greater<intpredicate function.
But as you know, we don't always use priority_queue<int>. Actually we
may need the "priority_queue<pair<int,int>, vector<pair<int,int,
cmphp;" thing.
My question is how should I write the "cmp" function?
I tried this one:
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by: Joe, G.I. |
last post by:
Can anyone help me w/ a priority_queue. I'm generating MyEvent classes
and I put them on a priority_queue, but I don't know how to get them in
priority. The priority is the event w/ the smallest timestamp.
// just a wrapper around priority_queue
pq = new MyPriorityQueue();
// I generate 10 events w/ a random timestamp
for (int i = 0; i <...
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by: card |
last post by:
I was wondering if anyone has a definitive answer on whether the STL priority_queue is dynamic? What I mean by this is best illustrated by a simple example. Suppose I have a priority queue of class called Position with a comparator class called PositionCompare as follows:
priority_queue<Position, vector<Position>, PositionCompare> _pQ;
...
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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...
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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...
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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. ...
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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...
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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...
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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...
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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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