Comments by Filipe Marques (Top 58 by date)

Hi Jan, finally I got to your code working. Thank you very much for your help :D Just one question, when I have the tree expanded and I resize the window, the tree is collapsed. There are any chances to avoid that? Best regards Filipe

I am sorry for taking so long to answer you. Thanks anyway :) As I said, this is my first program using WPF (and my second ou third using c# :D) so there is a very high probability of something wrong. But I solve my problem (see my comment in Solution 4). I do not know if this the best approach, but it works. Best regards, Filipe Marques

I need a button on each item. I must reduce the interaction between the user and the application. Well, I search on internet and I found the solution: http://stackoverflow.com/questions/4969418/wpf-treeview-with-right-alignment-values It was what I wanted :) Thank you Jan for your help.

Hi Jan, I used your code and the variable TreeViewWindow is never initialized. Maybe there is something that I am missing. Best regards, Filipe Marques

Hi, thank you for your answer but the result is the same as in johannesnestler solution, the application crashes. Best regards, Filipe Marques

Hi, thanks for your answer but when I used the '*', the application crashes. Best regards, Filipe Marques

Hi Jan, I updated my question

Sure, but I can not show you right now because I do not have the code with me. Thanks in advance, Filipe Marques

Hello Jan. Yes, the TreeViewItems have 2 columns. My only issue (I hope that be clear in my drawings :D ) is just about alignment. The width of the second column must be fixed and always docked to the right border of the window. The width of the first column is equal to window width minus the width of the second column. Beste regards, Filipe Marques

I think those are not the clusters that he asked for help. Best regards Filipe Marques

Hi Andreas Gieriet, please, see the answers that I wrote for Pwasser solution. Best regards, Filipe Marques

Andreas Gieriet and Pwasser, thanks for yours answers. I did not know the hide concept. I thought that a method is declared as public in base class, keeps accessible from derived class (for same methods with differents signatures). One more time, thanks for your answers :) . Best regards, Filipe Marques

Hi Jochen again :) This was just a test, to understand the process. So I did not check the if the project is a UNICODE or not because I knew the it was a non UNICODE. But yes, I must take in consideration. About the first two methods, you are right. Last night my head was over heat and I did not read properly the documentation and I thought that the drop target was my window. So, finally, the problem was the COleDataSource variable. It was a member of my class. I did not know that detail. Again, thanks for your help Jochen. Best regards, Filipe Marques

Thanks Jochen. You help me. Thats work know ;) Best regards, Filipe Marques

Hi, do not call srand function inside the for loop. Call it before the for loop. This function initialize the random seed. Best reguards, Filipe Marques

Please, see my update. Filipe

http://docs.oracle.com/javase/1.4.2/docs/api/java/io/BufferedReader.html
Here you havê the documentation about BufferedReader class. In method readLine(), if the result is null (InputInstArray[getlnst] == null) then you reach the end of your buffer. Filipe

Why you do not check if the return buffer is empty (yourBuffer.length) or is null? I'm suppose if you reach the EOF, buffer will came null or empty.

So, yours input came from a file? - http://stackoverflow.com/questions/7413830/java-read-line-from-file - You can get each linde from file and do what you want to do with it. Filipe

Thanks Julian ;)

Be careful. If you use this.setDefaultCloseOperation yours clase must be extend to JFrame, otherwise you must do tourFrame.setDefaultCloseOperation. If he wants exit of his program during the execution of something, you have System.exit(yourCode).
Filipe

In train() function, inside the if block, you have happyRating.get(i - 1). If you keep the code of onClick() function (see my second point in my answer), when i=11 you are access the 10th element, your array only has 9 elements.

Hi, look at this, I hope that helps you: http://stackoverflow.com/questions/3775373/java-how-to-add-image-to-jlabel

I never used eclipse. I use Netbeans or sometimes I use notepad++ with command line. But this is not relevant. You must have something similar with my code above. The unique difference that I can see is how eclipse create the button, but at the end, the result is the same. Best regards: Filipe

Kapilkp, I update my answer with a sample code. It does nothing, it's only to show you. (:

Well Espen, thanks a lot for your solution. As I said to Steve, rigth now, the best solution is to instanciate an object first and then use the assignment. Reduce a lot the complexity of my code. My 5. Thanks Filipe

Thanks Steve, now the copy constructor is called. It solved my problem, but meanwhile, new things came out and I need to store the information about my object, so a temporary object is not a solution. My 5 to realize me for that assignment is in fact a copy-constructor. (: Thanks, Filipe

So, I have a clue what is happening: Return value optimization.

http://en.wikipedia.org/wiki/Return_value_optimization

And as I read (http://stackoverflow.com/questions/9941043/how-to-disable-return-value-optimization-in-visual-studio-2010) it is not possible to disable it.

Thanks for your answers. Please, read the comment that I did in Steve solution, for I do not a copy-paste of it. (:

Thanks for all replies. I didn't know about this. I thought that if I use the assignment operator to initialize an object, I was doing a assignment, but after read a little about this, makes sense. How ever, my copy constructor is not called. If after the initialization, if I assignment again my object again, the assignment operator is called (as expected, my object is already initialized). (yesterday I thought that I had put the copy constructor in code above, but I forgot it)

Thanks for your reply. As I said to Steve, the copy constructor is not being called. I don't get it. I think I need a good night of sleep. :)

Hi thanks for your answer. I updated the code with the constructors. I put printf's all of them and only the second is call (from tree<_T>::pre_iterator tree<_T>::end() method). I think there is something missing...a really basic thing :)

In CodeProect there is actually an article to teach "how to create" custom operators. http://www.codeproject.com/Articles/31783/Custom-User-Defined-Operators-in-C

Thanks a lot for the explanation Philippe. I never realised that using signed or an unsigned variable causes such impact. Now I have same performance in both situations and the asm code is the same too.

I did that because in low performance CPU (like micro controllers) the division is a overkill instruction (correct me if I am wrong). I know that compilers now a days optimize the code. What I was expected is, in worst case, the division takes the same time as shift operator (the compiler transform the division into a shift). The result was a difference in order of 30%.

Yes, the 'n' is a signed variable (int). I updated the question. Now, I put the asm code for the two situations. The compiler still uses the SAR instruction. The only diference I see now is in the end of code: with the division operator, the compiler puts the instructor MOV and in shift operator, doesn't.

I execute each one 10.000.000 times. Thanks for the link. I hope one day I gain courage to learn a little bit about assembly :D

Hi Mike, I already updated the question with the assembly code.

The shift method is commented.

You have the opencv labrary and also you have the videoInput Library. They are very easy to use.

thanks for your answer.
your answer made me re-thinking of the approach of my problem. i really appreciate it. :)
best regards
Filipe

thanks for your answer
yes, I know about __LINE__ macro and I tried a lot of combinations with it, like in 'new' operator that i found in some forums, but I think the best way is to use a TRACE macro or something like that.
best regards, Filipe

Hi Mohammad,

In my opinion, the best way is to use a microcontroller to read data and then transfer to your pc, where you will process your data. You can use a simple serial communication or a wireless one to transfer data.

About the clock of the processor, you must know the sample time (the interval of time that you read data), because can happen you try to read a lot of data and the microcontroller can not have time to read all data (very bad situation) or can happen you have a high clock speed processor and you just need to read data from, for exemple, 5 to 5 minutes (doesn't make sense)

Best regards
Filipe Marques

i thought that for the compiler was the same.
And I use a lot of cast in code, and I always used.
Thanks
Filipe

Thanks Jochen,
works fine now.
However, I have a question: why you use

size_t remove_space(wchar_t *equation)

instead

size_t remove_space(wchar_t *(&equation))

?

Because I want the string back.

Filipe

I use normally char instead of wchar_t and I don't noticed this mistake.
thanks,

Filipe

But I always need a global IP, if I am server, my IP, if my friend is a server, his IP.

Imagine I want create a chat room. If I connect first, I am the server and my friend will connect to me as a client. If my friend connect first, he is the server and I am the client.

Filipe

Thanks.

Sometime ago I discovery a site like www.WhatIsMyIP.com but I thought that there was an easy way to get the public IP address by using a some function or some options of a function.

FIlipe

Thanks Jack.
Makes sense. So, if I understood, I configure my router to a certain port and a certain ip address and when I send data for that port and that ip address, I can receive in my computer.

And I don't take the chance of that ip address and port be used in other computer?

Thanks

Thanks Resmi for your tip, but I try gethostbyname() and I still get the local IP.

Thanks for help.
I have a copy constructor in may class.

thanks, make sense.