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Hi,
I need to make a generic version of Binary Search Tree, I've non generic version which uses comparable as a data on the node. Therefore I need to define generic type such that it should be an sub class of Comparable interface. Note: Comparable it self is a generic type. This what I've done so far but its giving me compiler errors.
Comparable<E> data;
void addNode(Node n)
{
int c = data.compareTo(n.data);
}
In the code above, data is of type Comparable<e> thus it has method compareTo(E data), but when I cast ((E)n.data) it gives me error that its not type safe. But I dunno why when I've defined Comparable<e> data, then why can't I cast <e>data?? Any help will be appreciated.
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note: Comparable<T> is the Java version, in C# it's IComparable<T>
The problem is that data would have to be IComparable<E> and E both at the same time - that could be the case, but it is not guaranteed (you could try to feed it an invalid type, and C# generics aren't C++ templates). So you must constrain the type E to be Comparable<E> in the class definition of the Binary Search Tree (and/or Node, depending on whether it is a nested type or not)
class BST<E> where E : IComparable<E>
{
E data;
}
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And how do you constaring generic types in class definition for JAVA. I read on Google that you can constraint in method definition not in beginning of the class.
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I don't know, try the Java forum
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NVM, I got it.
In java code is this way..
class BinarySearchTree<T extends <? super T>>
Where
? super T denotes any super class of type T.
Thanks for the help. 
Shivam Kalra
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hi guys
i did write a program for packet pc and when focus on a textbox virtual keyboard did not appear such as web page
whats problem ?
thanks a lot
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I think the half-shaft giggle pin code was too long.
Clearly, not nearly enough information to be able to help hence my meaningless response.
"If you think it's expensive to hire a professional to do the job, wait until you hire an amateur." Red Adair.
nils illegitimus carborundum
me, me, me
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I am not getting your question What do you want to know. please be more specific and clear while asking question. if you have some code to share then please share it Otherwise we unable to help you without getting any snaps of your clear question.
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I did the following example from msdn
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc /target:library /out:MathLibrary.DLL Add.cs Mult.cs<br />
<br />
csc /out:TestCode.exe /reference:MathLibrary.DLL TestCode.cs
http://msdn.microsoft.com/en-us/library/3707x96z%28v=vs.80%29.aspx
but how do I do the same thing in GUI of VS? Like having 2 files building a dll and then an exe linked to it?
Thanks.
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In Visual Studio you can:
1.
create a new project using one of the templates; the "Class Library" one would result in a DLL file.
2.
modify the type of an existing project using the project properties (right-click the project in the solution pane), then change the output type.
Once you have a project that generates a DLL, you would need a second project (e.g. a WinForm or Console one) that can use the DLL (add a reference!).
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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Isn't it possible to have everything in one project and with one button let it build first all the Dlls and then the depended exe?
Maybe by putting several projects in a workspace?
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No it isn't. One project, one DLL/EXE output file. However you can have several projects in one solution (SLN file).
Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum
Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.
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this may confuse the person asking the question... if you want to build a solution with multiple projects (i.e. to build all with one click), its easily done in studio, just create a master solution and pull in the project files from the related projects.
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I think I got it right. As I understood it I have to pull in whole projects, not only files. Considering the above example of Ms, I created a solution and then 2 projects in it, one with the Mult.cs and Add.cs files which generates the dll and another with the contents of TestCode.cs a bit changed as far as its namespace and the references concerns. Then I changed the starting project and generally I played with some VS commands.
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you have to pull in entire projects because that's the only way you'll get the project specific settings and options (such as linker options for each project)
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Well, not only. I think that the only way to have built a dll and a dependent exe is to put them in different projects. That's what I ment. Isn't it right?
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yes, but they can be in the same solution
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and that's what I am saying... They can exist inside the same solution, but not inside the same project.
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yep... that'll facilitate a lot of other things like building an entire solution with a single click and debugging dll/exe source simultaneously.
i have a solution with 26 projects in it (for a large software suite)
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yes its possible, the terminology may sound a bit confusing but its easy... see my comment to luc
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You could, but that's not how it's intended to be used. My first thought on how to do it would be to use a pre- or post-build event.
As luc said -- each project in a solution is intended to produce one executable (EXE or DLL).
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well the concept of a solution is meant to contain multiple projects... and that is the way its meant to be used...
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Yeeesss... isn't that kinda what I said?
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i guess you did, but using pre and post build events for building multiple projects in not a good approach, should be one solution with multiple projects
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Yeeesss... isn't that kinda what I said?
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