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  • Code crashing compiler...

    - by AndrejaKo
    Hi! I'm experimenting with a piece of C code. Can anyone tell me why is VC 9.0 with SP1 crashing for me? Oh, and the code is meant to be an example used in a discussion why something like void main (void) is evil. struct foo { int i; double d; } main (double argc, struct foo argv) { struct foo a; a.d=0; a.i=0; return a.i; } If I put return a; compiler doesn't crash.

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  • Weird ViewControllers - iPhone SDK

    - by Kevin
    Hello everyone, I have a Tab-Bar Application for this iPhone application I am making. I make a simple button on the 3rd view (3rd tab), and give it an IBAction to give an alert view. When I press build and go, everything works out fine. I go onto the 3rd tab, and I press my button. It simply crashes... Why is this happening? Everything I put in this 3rd tab crashes. I create a simple view controller, and write the class files to start over, but I keep getting the same errors.. Everything works fine on my first tab, where I originally got the first view controller.. P.S It also says Incomplete Implementation of Class 'ThirdViewController'. I don't know why its there.. If anyone can help me out here, i would greatly appreciate it. Kevin

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  • Does the 'dynamic' keyword and the DLR promote C# to a first class citizen as a dynamically typed la

    - by Quigrim
    I understand that the new ‘dynamic’ keyword in C# 4.0 facilitates interaction with dynamic .NET languages, and can help to cut code by using it instead of reflection. So usage is for very specific situations. However, what I would like to know is if it will give C# all the dynamic benefits that one would get in other dynamic languages such is the IronXXX languages? In other words, will it be possible to write a entire application in C# in a dynamic language style? And if it is possible, would it be recommended or not. And why, or why not respectively? Will I get all the benefits of a dynamic language without switching to another language?

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  • URL valid characters. java to validate.

    - by Chez
    a string like: 'www.test.com' is good. a string like: 'www.888.com' is good. a string like: 'stackoverflow.com' is good. a string like: 'GOoGle.Com' is good. why ? because those are valid urls. it does not necessarely matter if they have been registered or not. now bad strings are: 'goog*d\x' 'manydots...com' why because you can't register those urls. if I have a string in java which is supposed to be a good url what's the best way to validate it ? thanks a lot

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  • ActiveX communication

    - by Mario Marinato -br-
    I'm developing an ActiveX EXE that exposes an specific class to a third-party software. This third-party software instanciates an object of this class and uses its methods. Strangely, this third-party software destroys its object of my exposed class as soon as it calls an specific method, but I have no idea why this happens. The only clue I have is that this method is the only one that returns a value. All the other ones are simple 'subs' that do not return any value, and when they are called nothing wrong happens. I'm using VB6. Do you guys have any idea of why it's happening?

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  • Scrapped HTML does not written at the beginning of text file.

    - by karikari
    Currently, I'm scraping the HTML code of a page, and write it to a txt file. My problem is, why there must be empty spaces or empty lines at the beginning? The HTML codes written to the txt file, seems does not start at the beginning of the txt file. Means, the '<' does not located at the position 0 of the txt file. After a few runs, my HTML is always written a few lines down inside the txt file. Can anyone tell me why : )

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  • Must See Conference Videos for Python/Django Developers

    - by Koobz
    There's lots of good conference videos online regarding Python and Django development. Instead of watching ST:TNG at the computer, I figure it'd more productive to hone my knowledge . Fire away with some of your most inspiring and educational Python, Django, or simply programming related talks. Provide an explanation of why you found the talk useful. Examples: James Bennet on Re-usable Apps - Got me to take a serious look at django apps. Put together a fairly robust site in two days afterwards with django-cms, django-photologue, django-contact-form. Good advice on when your app is crossing boundaries and why it's good to err on the site of 'make it a separate app.'

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  • What is the difference between NULL in C++ and null in Java?

    - by Stephano
    I've been trying to figure out why C++ is making me crazy typing NULL. Suddenly it hits me the other day; I've been typing null (lower case) in Java for years. Now suddenly I'm programming in C++ and that little chunk of muscle memory is making me crazy. Wikiperipatetic defines C++ NULL as part of the stddef: A macro that expands to a null pointer constant. It may be defined as ((void*)0), 0 or 0L depending on the compiler and the language. Sun's docs tells me this about Java's "null literal": The null type has one value, the null reference, represented by the literal null, which is formed from ASCII characters. A null literal is always of the null type. So this is all very nice. I know what a null pointer reference is, and thank you for the compiler notes. Now I'm a little fuzzy on the idea of a literal in Java so I read on... A literal is the source code representation of a fixed value; literals are represented directly in your code without requiring computation. There's also a special null literal that can be used as a value for any reference type. null may be assigned to any variable, except variables of primitive types. There's little you can do with a null value beyond testing for its presence. Therefore, null is often used in programs as a marker to indicate that some object is unavailable. Ok, so I think I get it now. In C++ NULL is a macro that, when compiled, defines the null pointer constant. In Java, null is a fixed value that any non-primitive can be assigned too; great for testing in a handy if statement. Java does not have pointers, so I can see why they kept null a simple value rather than anything fancy. But why did java decide to change the all caps NULL to null? Furthermore, am I missing anything here?

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  • Rank Source Control Options-VSS vs CVS vs none vs your own hell

    - by Roman A. Taycher
    It seems like a lot of people here and on many programmer wikis/blogs/ect. elsewhere really dislike VSS. A lot of people also have a serious dislike for cvs. In many places I have heard a lot of differing opinions on whether or not using VSS or cvs is better or worse then using no source control, please rate the worst and explain why!!!!! you rated them this way. Feel free to throw in your own horrible system in the rankings. If you feel it depends on the circumstances try to explain the some of the different scenarios which lead to different rankings. (note:I see a lot of discussion of what is better but little of what is worse.) second note: while both answers are nice I'm looking less for good replacements and more for a comparison of which is worse and more importantly why!

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  • Error "E_UNEXPECTED(0x8000FFFF)" when using CDec/CInt/IsNumeric

    - by Marc vB
    I have encountered a strange problem, which I could solve but don't understand why it did occur. I have build a DLL with COM enabled. In this DLL I have classes that did use the functions CInt, CDec and IsNumeric. If I test these classes from a .NET application then it works ok. But when I called/run these classes from a Win32 application (with COM) then I did get an "E_UNEXPECTED(0x8000FFFF)" error. After some debugging I found out that the problem would go away if I: - replaced IsNumeric with Integer.TryParse or Decimal.TryParse - replaced CInt with Integer.Parse - replaced CDec with Decimal.Parse Can anyone explain this? Again, I could solve it by doing this but I would like to know why.

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  • Redirect print in Python: val = print(arg) to output mixed iterable to file

    - by emcee
    So lets say I have an incredibly nested iterable of lists/dictionaries. I would like to print them to a file as easily as possible. Why can't I just redirect print to a file? val = print(arg) gets a SyntaxError. Is there a way to access stdinput? And why does print take forever with massive strings? Bad programming on my side for outputting massive strings, but quick debugging--and isn't that leveraging the strength of an interactive prompt? There's probably also an easier way than my gripe. Has the hive-mind an answer?

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  • How should I use color in my application? Single, Theme, or Chaos?

    - by CodeSlave
    How should I be using color in my application? I have over a 100 different forms (windows) in my application, and the default windows grey seems like a bad choice to me. One school of thought says pick one neutral color, and use the same one everywhere. Another school of thought says pick a set of neutral colors, and use them same ones within a group of form (e.g., shipping screens might be light green, receiving screens light orange, user administration screens light blue, etc.). The final school of thought says make every form different. We've got millions of colors, why not use them? What should I do and why?

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  • Thumbnail wont show up in Facebook link share

    - by Xander Aeder Putris
    I have been messing with Open Graph for hours and can't figure out why Facebook still wont let me show an image when I share a link to a new site I just launched. Even sites I built 5 years ago that have no clue of Open Graph show images so I have no idea why this new site wont allow it. I just need to launch this site and every time I post the url in my status update only text appears. I re sized the image to be 200px x 135px but that still doesn't work.. It can find the image but it wont show up. Please help me figure this thing out. I have a number of people sharing this page right now and no image shows up.. So embarrassing. Thank you in advance! The website is http://sosshapes.com

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  • iPhone: should initWithNibName:bundle: method be deleted from UIViewController class if not used?

    - by Scott Pendleton
    I notice that this method is provided in UIViewController .m files, but is commented out: - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil I had been leaving that method commented out, or even deleting it. But then I looked at this line inside the method: if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) I assume that if it were truly important for self to be set equal to super, then Apple would not have the method be commented out by default. On the other hand, if I do need to do some customization in that method, why do I need to set self = super? What's the best practice, and why?

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  • Microsoft _stprintf warning

    - by mnh
    Why I get the following warning for the following code :) Code: _stprintf(m_szFileNamePath,_T("%s"),strFileName); warning C4996: '_swprintf': swprintf has been changed to conform with the ISO C standard, adding an extra character count parameter. To use traditional Microsoft swprintf, set _CRT_NON_CONFORMING_SWPRINTFS. I know _strprintf is a macro which if _UNICODE is defined will evaluate to _swprintf else it will be sprintf. Now what is this _swprintf. There is a function swprintf, but why is _stprintf evaluating to _swprintf instead of swprintf. What is the difference b/w the _xxx and xxx functions? EDIT: Okay there are two definitions for the UNICODE version of _stprintf, which one is included? The one in tchar.h or strsafe.h?

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  • Oracle: Use of notational parameters which calling functions in insert statements not allowed ?

    - by Sathya
    Why does Oracle 10 R2 not allow use of notational parameters while calling functions in insert statements ? In my app, I'm calling a function in an insert statement. If use notational method of parameter passing, I get an ORA-00907: Missing right parenthesis error message INSERT INTO foo (a, b, c) VALUES (c, F1(P1=>'1', P2=>'2', P3 => '3'), e) Changing the same to position based parameter passing, and the same code gets compiled with no errors. INSERT INTO foo (a, b, c) VALUES (c, F1('1','2','3'), e) Why is this so ?

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