I have old code that uses size_t which IIRC comes from cstring.h.
On OS X, I either dont know how to find/use this or it is not available.
What would I replace it with?
Can anyone recommend a web site that includes up to date performance tips for Java? Most of the sites I have found seem to be old and I guess the newer versions (1.5 - 1.7) may have obsoleted some recommendations.
Hi, I have a tabbar with one of the tabs containing a drilldown table.
I am having problems once the user has finished using the drilldown table. If they change to another tab, then change back to the original tab, the original tab is still where I left it (at the bottom of the drill down showing the detail view)
What I want is on moving to an alternative tab theold tab resets
I have tried adding all sorts of stuff to -(void)viewDidDisappear and -(void)viewDidUnload with no success
What do I need to do?
Cheers
What are the pros and cons between using the ASP.Net control compared to theold reliable table html implementation.
I know that the asp:Table will end up on the returned page as a html table, and from looking into it so far people are saying its easier to work with the asp:Table in the server side code, but I'd love to hear what the stackoverflow community has to say about the matter.
Is there a way to force QtCreator to recompile all the resources (images / qss files) i have specified in my qrc file every time i build the project?
Currently if i change some styles in my qss file but dont remove the file and re-add it to the qrc file theold version of my qss file is used.
Thanks.
I want to modify the "Java class" template, so that the class javadoc comment includes more than just the author. In Netbeans 6.8., I go to Tools Templates Java Java Class, and modify the template. However, nothing seems to change. I tried restarting Netbeans, just in case, but theold template is still used.
How do I get Netbeans to recognize changes to the template for Java Classes?
Are there any tools available for converting a desktop vista machine into a virtual machine to run with MS Virtual PC? I am buying a new workstation and would like to virtualize my old machine onto the new one. I know of the tools for Hyper-V, but i'll be running Win7 on the new machine, not Hyper-V server.
I have a View where I can upload an image and the image is also displayed in there like this:
//ResourceStorage is a virtual directory that indicates to the pictures storage location
<img src='<%=Url.Content("~/ResourceStorage/Profile/pic.jpg") %>' alt='pic' />
after I upload the picture, on the hard drive I get the new "pic.jpg" but in the browser I still have theold one (I tried clearing the cache, doesn't help)
i have this querystring that shall open up my page.
http://www.a1-one.com/[email protected]&stuid=123456
Now when this page loads, on page_load, I want to pick up email and stuid in two different variables. So I can use them to insert into my database (sql server)
how can this be done in vb.net
I'm having a little trouble understaing how I would use covariance and contravariance in the real world.
So far, the only example's I've seen have been the same old array example.
object[] objectArray = new string[] { "string 1", "string 2" };
It would be nice to see an example that would allow me to use it during my development if I could see it being used elsewhere.
Can anyone point me to some useful resources?
I'm trying to learn the Microsoft data / service stack. I want to build a database in SQL Azure and expose it to a c# client application.
I've never worked with any SQL database technology.
Looking online, everything just seems so confusing -- too many technologies, hard to tell what's new vs what's old.
What's the latest technologies to look at, and what (books?) should I be reading?
I don't really think there is some method to do this… Anyway… How can I replace one object with another everywhere in the program? It would be like all the references to an old object start to point to a new one.
I did it like this, but theold broadcast, doesn’t stay it is replaced with the ew one!
`public function broadCastMeNow(event:Event):void
{
camId = comments.selectedItem["o_id"];
broadCastMe = new broadcastNow(camId);
connn.addChild(broadCastMe);
connn.x += 100;
}
s:SpriteVisualElement x=”100? id=”connn”
`
How can I make it that it stays and adding the new one on x +=100px?
I've got some legacy code that, instead of virtual functions, uses a kind field to do dynamic dispatch. It looks something like this:
// Base struct shared by all subtypes
// Plain-old data; can't use virtual functions
struct POD
{
int kind;
int GetFoo();
int GetBar();
int GetBaz();
int GetXyzzy();
};
enum Kind { Kind_Derived1, Kind_Derived2, Kind_Derived3 };
struct Derived1: POD
{
Derived1(): kind(Kind_Derived1) {}
int GetFoo();
int GetBar();
int GetBaz();
int GetXyzzy();
// plus other type-specific data and function members
};
struct Derived2: POD
{
Derived2(): kind(Kind_Derived2) {}
int GetFoo();
int GetBar();
int GetBaz();
int GetXyzzy();
// plus other type-specific data and function members
};
struct Derived3: POD
{
Derived3(): kind(Kind_Derived3) {}
int GetFoo();
int GetBar();
int GetBaz();
int GetXyzzy();
// plus other type-specific data and function members
};
and then the POD class's function members are implemented like this:
int POD::GetFoo()
{
// Call kind-specific function
switch (kind)
{
case Kind_Derived1:
{
Derived1 *pDerived1 = static_cast<Derived1*>(this);
return pDerived1->GetFoo();
}
case Kind_Derived2:
{
Derived2 *pDerived2 = static_cast<Derived2*>(this);
return pDerived2->GetFoo();
}
case Kind_Derived3:
{
Derived3 *pDerived3 = static_cast<Derived3*>(this);
return pDerived3->GetFoo();
}
default:
throw UnknownKindException(kind, "GetFoo");
}
}
POD::GetBar(), POD::GetBaz(), POD::GetXyzzy(), and other members are implemented similarly.
This example is simplified. The actual code has about a dozen different subtypes of POD, and a couple dozen methods. New subtypes of POD and new methods are added pretty frequently, and so every time we do that, we have to update all these switch statements.
The typical way to handle this would be to declare the function members virtual in the POD class, but we can't do that because the objects reside in shared memory. There is a lot of code that depends on these structs being plain-old-data, so even if I could figure out some way to have virtual functions in shared-memory objects, I wouldn't want to do that.
So, I'm looking for suggestions as to the best way to clean this up so that all the knowledge of how to call the subtype methods is centralized in one place, rather than scattered among a couple dozen switch statements in a couple dozen functions.
What occurs to me is that I can create some sort of adapter class that wraps a POD and uses templates to minimize the redundancy. But before I start down that path, I'd like to know how others have dealt with this.
I'm working with an old windows app in visual studio 2005. A webserviced referenced in the original app has 2 functions and when i peak inside the auto-generated reference.cs file I notice a couple of other functions to allow async calls have been geenrated i.e. BeginWhateverFunctionNameIsCalled and EndWhateverFunctionNameIsCalled.
My problem is that I've created a new windows app and added the same web references but the Begin and End functions are not generated in my reference.cs proxy class. Anyone know whats going on?
From what I read, PHP 6 will break a lot of php scripts. I understand the reasons why it may break but why don't they just keep the PHP 5 and simply call PHP 6 as a different language based on PHP syntax? Like for example, why not just call php 6 scripts with an extension, "p6"- why are they trying so hard to make it backward compatible for old scripts when the extension can be used to call a specific interpreter?
(EDIT: I made it a community wiki as it is more suited to a collaborative format.)
There are a plethora of ways to access SQL Server and other databases from .NET. All have their pros and cons and it will never be a simple question of which is "best" - the answer will always be "it depends".
However, I am looking for a comparison at a high level of the different approaches and frameworks in the context of different levels of systems. For example, I would imagine that for a quick-and-dirty Web 2.0 application the answer would be very different from an in-house Enterprise-level CRUD application.
I am aware that there are numerous questions on Stack Overflow dealing with subsets of this question, but I think it would be useful to try to build a summary comparison. I will endeavour to update the question with corrections and clarifications as we go.
So far, this is my understanding at a high level - but I am sure it is wrong...
I am primarily focusing on the Microsoft approaches to keep this focused.
ADO.NET Entity Framework
Database agnostic
Good because it allows swapping backends in and out
Bad because it can hit performance and database vendors are not too happy about it
Seems to be MS's preferred route for the future
Complicated to learn (though, see 267357)
It is accessed through LINQ to Entities so provides ORM, thus allowing abstraction in your code
LINQ to SQL
Uncertain future (see Is LINQ to SQL truly dead?)
Easy to learn (?)
Only works with MS SQL Server
See also Pros and cons of LINQ
"Standard" ADO.NET
No ORM
No abstraction so you are back to "roll your own" and play with dynamically generated SQL
Direct access, allows potentially better performance
This ties in to the age-old debate of whether to focus on objects or relational data, to which the answer of course is "it depends on where the bulk of the work is" and since that is an unanswerable question hopefully we don't have to go in to that too much. IMHO, if your application is primarily manipulating large amounts of data, it does not make sense to abstract it too much into objects in the front-end code, you are better off using stored procedures and dynamic SQL to do as much of the work as possible on the back-end. Whereas, if you primarily have user interaction which causes database interaction at the level of tens or hundreds of rows then ORM makes complete sense. So, I guess my argument for good old-fashioned ADO.NET would be in the case where you manipulate and modify large datasets, in which case you will benefit from the direct access to the backend.
Another case, of course, is where you have to access a legacy database that is already guarded by stored procedures.
ASP.NET Data Source Controls
Are these something altogether different or just a layer over standard ADO.NET?
- Would you really use these if you had a DAL or if you implemented LINQ or Entities?
NHibernate
Seems to be a very powerful and powerful ORM?
Open source
Some other relevant links;
NHibernate or LINQ to SQL
Entity Framework vs LINQ to SQL
I'm opening a 2005 SSIS pakage and also an old C# project..both are in this solution here. I'm missing namespaces and I can't find the assemblies to add back to my references folder for my C# Project
Microsoft.SqlServer.Dts.Pipeline
for example is not one I find in the list of references in the .NET references tab. So how the hell do I get these SQL Server assemblies? Do I have to install the SQL Server 2008 sdk?
Lost.
Hi guys.
First I want to say is that I am 37 years old and not from programer background (actualy from biology). And my question is should I start learning java? I have coded in php and javascript for a year and a half. Every answer would be appreciated
Thanks in advance
Bobi.
Who can give me a link for the operator= of vector in MSDN?
Why I can only find operator[]?
If operator= is just something default, like copy everything in A to B, how this following code works?
vector<double> v(100,1);
v = vector<double>(200,2); // if operator= is just a trivail version, how to make sure theold v get cleared?
Hi
I have a simple problem, I have an app based on CoreData and I need to change the structure a little. How can I migrate theold structure into the new one. Just adding one attribute will chrash the whole app.
Thanks
Assume,
void proc(CString& str)
{
str = "123";
}
void runningMethod()
{
CString str="ABC";
proc(str);
}
I understand that at the exit of runningMethod str will be deallocated automatically; in this case, how does C++ delete theold data ("ABC")?
Thanks,
Gil.
I'm looking for arguments as to how best to size the young generation (with respect to theold generation) in an environment where low latency is critical.
My own testing tends to show that latency is lowest when the young generation is fairly large (eg. -XX:NewRatio <3), however I cannot reconcile this with the intuition that the larger the young generation the more time it should take to garbage collect.
The application runs on linux, jdk 6 before update 14, i.e G1 not available.
So I've spent a lot of time making an iPhone game and have recently realized that I don't have to limit myself to just Apple - I know there are app stores for Palm and Android, but does anybody know of a good "app store" for the plain old PC? I would like to have one where individual developers can publish an app and not have to worry about all the billing and piracy issues!