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Thanks,
pmarfleet wrote: it is preferable to place every block of code within curly braces
I take it you are referring to the if statements.
I agree with you - I sometimes take shortcuts; however it helps others, reading my code, to avoid those shortcuts.
You always pass failure on the way to success.
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That's right. For instance, within your loop it isn't immediately obvious which statements are dependent on the result of the if statement and which aren't. Placing all dependent statements within curly braces aids readability, even if this is only a single statement.
Paul Marfleet
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GuyThiebaut wrote: I sometimes take shortcuts; however it helps others, reading my code, to avoid those shortcuts.
Not only does it help others, but it will help you in the long run as well. I have seen all too often someone (even the original author) modifying code sometime later (months to years), not paying attention and adding a line to an if block. The problem here was that the if block originally was a single line with no braces. The new line was added, and significantly changed the behavior of the code. Had the braces been there to start, it would have been completely obvious where the line was going and that it was properly inside the if block.
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The variables that you declare in the class should be declared inside the method instead.
As the method is not using any data from the object instance, it should be static.
Method names are usually written in PascalCase, i.e. IsPrime.
To always use brackets around a block makes the code more readable, i.e:
if (testLimit % 2 == 0) {
return false;
}
If the code in the method has a singe exit point, it's easier to follow.
---
single minded; short sighted; long gone;
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Thanks for all the information and help
You always pass failure on the way to success.
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You can also look at the Framework Design Guidelines (either on MSDN or the printed book). These are the design guidelines Microsoft created after .NET 1.0 was released.
The important thing to remember about code style and standards is that they:- are guidelines
- are not set in stone
- should be consistent
- should be flexible enough to adapt to new languages and technologies within those languages
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Thanks,
I get what you are saying regarding bracketting.
In some of the procedural languages I have programmed I have seen people using what are called "in-line ifs".
I have always avoided them, unless there is no other solution, for precisely this reason - the logic can be misunderstood or lost and new code added can cause all sorts of problems at testing (we do all test code don't we...).
Thanks for the reference.
I will look at this.
As you say standards need to be flexible as in my experience some businesses have their own in house rules on coding standards.
When I was trained in COBOL (no I'm not a Grandfather yet...) the trainers would get a ruler and measure code indentation, to the centimetre, on our code printouts 
You always pass failure on the way to success.
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i got a realy strange issue with invoking code on a multi threaded application , it happens on thins function below:
<br />
private void closeForm()<br />
{<br />
if (this.InvokeRequired)<br />
{<br />
ShowFormCallback d = new ShowFormCallback(closeForm);<br />
this.Invoke(d, new object[] {});<br />
}<br />
else<br />
{<br />
try<br />
{<br />
goform.Close();<br />
}<br />
catch(Exception e)<br />
{ <br />
Console.WriteLine("Cant close the damn form " + e.Message);<br />
}<br />
}<br />
<br />
}<br />
<br />
}<br />
The Error is:
"Cross-thread operation not valid: Control 'player2' accessed from a thread other than the thread it was created on."
although on debug i see that when the closeForm() is executed
this.InvokeRequired has a "false" value.
and yet when the line: "goform1.Close();" is executed i get cross-thread operation not valid.
how is this possible, i have used this technique (given by the MSDN) in order to avoid such errors several times and never had problem with it,
so what could be the cause of such a thing?
Net
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What does "goform.InvokeRequired" return? That is the control you are executing a method on, so it's really up to that control to determine if it needs an invoke.
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oh oops , my mistake  , i wrote this.InvokeRequired instead of ,
goform.InvokeRequired , now it returns 'true'
Net
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Can Fibonacci Series be generated with the help of operator overloading?
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It would for exampel be possible to make a class representing a number in the fibonacci series and overload for example ++ to give the next number in the series.
I can't think of any reason this should be done, but as long as the question is if it could be done, then the answer is yes.
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Sure - it could even be done with anonymous methods if you like. However, wouldn't it have been better for you to actually try it out before posting a question? That would have answered it for you - and you'd have advanced your coding skills just that little bit more.
Deja View - the feeling that you've seen this post before.
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It's possible, but certainly not practical.
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Hi all,
Library is coded in C#.
Here are the conditions:
So if I've got an array list of MyObjects_;
Each MyObject_ contains a value
There are only 4 types of MyObjects_ (Ie. obj1 = 6, obj2 = 4, obj3 = 3, obj2 = 2, obj1 = 1);
I have an input value of (MyObjects_)input_ = 21;
The array list size is unsorted and is an undetermined size until runtime.
What's the logic to determine the most accurate combination of objects to result in the combination of (obj[i] == input_)?
Thanks in advance
Humble
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Just looking for the logic, and not the code.
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humblepgmr wrote: So if I've got an array list of MyObjects_;
What's the deal with the underscore?
humblepgmr wrote: There are only 4 types of MyObjects_ (Ie. obj1 = 6, obj2 = 4, obj3 = 3, obj2 = 2, obj1 = 1);
What do you mean by "type" in this case?
humblepgmr wrote: What's the logic to determine the most accurate combination of objects to result in the combination of (obj[i] == input_)?
Could you specify in what way any combination would be more accurate than any other?
---
single minded; short sighted; long gone;
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1) How does an input value of 21 fit into a context of an array list containing 4 different types, none of which are 21?
2) What is an "accurate combination of objects"?
3) What is now i in the "obj[i] == input_" part? And index I guess... but of what?
4) What is that trailing underscore doing everywhere (not relevant for your question as such I guess, just wondering).
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Hi,
I have dug through MSDN regarding using a destrutor and Dispose method.. Now I am confused, whats the difference between the two.. They both can be used to release unmanaged resources, right? So whats the difference?
Regards,
Blumen
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In c# there's no such thing as a deterministic destructor like in c++. Instead you have a non-deterministic finaliser. If you include a finaliser in your class, when you have finished with the object it will be placed in the finalisation queue, and the finailise method will get called next time garbage collection is run.
This means that your objects may hang around for quite a while, hogging up memory, or holding onto resources, so to help things along we use the dispose pattern which allows us to ensure that objects gets cleared up quickly and finislisation doesn't have to happen. The dispose method should clean up all resourses, and supress finalisation, while the finaliser method should only clear up _unmanaged_ resources. This is becuase the finaliser may get called much later on, so other managaed resources may already have been destoryed, so you mustn't risk referencing them again.
You can then call the dispose method manually when you have finished with the object (or use the "Using" keyword to ensure it gets called)
To read about the dispose pattern check out this site:
http://msdn2.microsoft.com/en-us/library/b1yfkh5e.aspx
See this page for more about the "Using" keyword
http://msdn2.microsoft.com/en-us/library/yh598w02.aspx
Hope that helps.
Simon
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Thanks alot Simon, that was very useful.
So I conclude that:
1. Finalize method should be used to clear up only unmanaged resources, whereas Dispose method can be used to clearup any object that I create.
Using keyword is very helpful here.
2. We are unable to predict when Finalize would be called and executed by GC, where as Dispose method would be called as soon as the object is out of scope, right?
Regards,
Blumen
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blumenhause wrote: Finalize method should be used to clear up only unmanaged resources
Dispose should be used to clean up resources. A finalizer can be used as a backup when implementing the IDisposable interface, but then it's never really meant to be used as the Dispose method should suppress the finalizer.
A finalizer is not guaranteed to be executed. A background thread executes the finalizers in the finalization queue. If the finalizers left in the queue take too long to run when the application ends, the rest of the objects are just thrown away without finalizing.
blumenhause wrote: where as Dispose method would be called as soon as the object is out of scope
No. The Dispose method is never called automatically. You have to call it explicitly, or use a using block that will call it.
As you always call it explicitly, you always know when it's called.
---
single minded; short sighted; long gone;
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You can also take a look at this article: http://www.codeproject.com/useritems/idisposable.asp[^]
Finalizers are expensive to use in that they are difficult to write properly and add an additional memory cost to your finalizable object. Any time a finalizable object is created it is placed in a special queue that must be checked each time the garbage collection cycle runs. This happens even if you never actually use the object.
The best approach is to implement the IDisposable interface and the Dispose pattern properly, and only implement a finalizer when absolutely necessary.
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Hai Everybody,
I am having a tree view in that the nodes are in a hierarchical manner.
The nodes are checkable.
Now when some child nodes are not selected, then I have to make the parent node check box to have the check state "Indeterminate".
But there is no Check State property of the tree node.
Then i tried to convert it as a check box in code, but it is giving the error indicating that it is not possible.
Can any one give me the solution for this?
Best Regards,
M. J. Jaya Chitra
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, if u force then u can do !!! but not recomanded !!!!
in VB6 and Dispose() in C# 
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