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• How to show percentage of 'memory used' in a win32 process?

  - by pj4533

  I know that memory usage is a very complex issue on Windows. I am trying to write a UI control for a large application that shows a 'percentage of memory used' number, in order to give the user an indication that it may be time to clear up some memory, or more likely restart the application. One implementation used ullAvailVirtual from MEMORYSTATUSEX as a base, then used HeapWalk() to walk the process heap looking for additional free memory. The HeapWalk() step was needed because we noticed that after a while of running the memory allocated and freed by the heap was never returned and reported by the ullAvailVirtual number. After hours of intensive working, the ullAvailVirtual number no longer would accurately report the amount of memory available. However, this method proved not ideal, due to occasional odd errors that HeapWalk() would return, even when the process heap was not corrupted. Further, since this is a UI control, the heap walking code was executing every 5-10 seconds. I tried contacting Microsoft about why HeapWalk() was failing, escalated a case via MSDN, but never got an answer other than "you probably shouldn't do that". So, as a second implementation, I used PagefileUsage from PROCESS_MEMORY_COUNTERS as a base. Then I used VirtualQueryEx to walk the virtual address space adding up all regions that weren't MEM_FREE and returned a value for GetMappedFileNameA(). My thinking was that the PageFileUsage was essentially 'private bytes' so if I added to that value the total size of the DLLs my process was using, it would be a good approximation of the amount of memory my process was using. This second method seems to (sorta) work, at least it doesn't cause crashes like the heap walker method. However, when both methods are enabled, the values are not the same. So one of the methods is wrong. So, StackOverflow world...how would you implement this? which method is more promising, or do you have a third, better method? should I go back to the original method, and further debug the odd errors? should I stay away from walking the heap every 5-10 seconds? Keep in mind the whole point is to indicate to the user that it is getting 'dangerous', and they should either free up memory or restart the application. Perhaps a 'percentage used' isn't the best solution to this problem? What is? Another idea I had was a color based system (red, yellow, green, which I could base on more factors than just a single number)

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• Unknown Curl error

  - by Kaido

  Hey i got small problem getting an unknown curl error from my script "curl_error(): 180 is not a valid cURL handle resource". Im not able to find any recourses about that error so maybe anyone has any experience with this. Thanks already. heres the part which causes the error $resp = curl_error($ch); error_log(date('Y M D h:s:m '). ": $current error: " .curl_error($ch)."\n", 3, '../../usererrors/'.$username.'errors');

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• Which javascript minification library produces better results?

  - by lsdr

  Between Yahoo! UI Compressor, Dean Edwards Packer and jsmin, which produces better results, both in terms of resulting footprint and fewer errors when obfuscating.

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• MIN() and MAX() in Swift and converting Int to CGFloat

  - by gotnull

  I'm getting some errors with the following methods: 1) How do I return screenHeight / cellCount as a CGFLoat for the first method? 2) How do I use the equivalent of ObjC's MIN() and MAX() in the second method? func tableView(tableView: UITableView!, heightForRowAtIndexPath indexPath: NSIndexPath!) -> CGFloat { var cellCount = Int(self.tableView.numberOfRowsInSection(indexPath.section)) return screenHeight / cellCount as CGFloat } // #pragma mark - UIScrollViewDelegate func scrollViewDidScroll(scrollView: UIScrollView) { let height = CGFloat(scrollView.bounds.size.height) let position = CGFloat(MAX(scrollView.contentOffset.y, 0.0)) let percent = CGFloat(MIN(position / height, 1.0)) blurredImageView.alpha = percent }

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• groovy: how to escape "(" regex etc in textarea?

  - by user311884

  I have some text area field in my grails application. I got the following errors: .PatternSyntaxException: Unmatched closing ')' near index 36 Name: note: 1) data listing .... how could i escape the regular expressions in the text area field? thanks.

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• jQuery Find element else do nothing ?

  - by Andrew

  Hi Guys, I am trying to use jQuery to basically wrap a bunch of CSS modifications via jQuery but on pages where the #IDs or Classes dont exist I get errors ? Like jQuery(".class").css(random_stuff) is not a function Any ideas what I can do to either "find" the elements and do nothing or ?

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• Magento 1.3 or 1.4

  - by Oliver Bayes-Shelton

  Hi, I am having some real issues with Magento version 1.4, I get alot of "There has been an error processing your request." errors do you think going to the latest version of 1.3 would be more stable ?

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• How to run & create a dll files.

  - by Gopal

  Using Visual Studio 2005 I download open source code from one site, when i try to run the source code, it showing error like Namespace & assembly references.... What are the procedure i have to do for this kind of errors.... And also i want to create a dll file by using this code. For Dll what are the procedure need to do? Need Help.

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• #define NULL NULL

  - by sheepsimulator

  #ifndef NULL #define NULL NULL #endif This code compiles in gcc with no warnings/errors. Can someone explain what the preprocessor is doing here?

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• Make iPad app a Universal app

  - by Peter Hajas

  I have an iPad app that I would like to make Universal, however this seems alarmingly difficult. I've changed things around so that I support both builds, but when building, I get lots of errors about using UIPopOvers. Here're my questions: Why does UI_USER_INTERFACE_IDIOM() not compile or register on 3.1.3? Can I conditionally have variables in a class definition based on UI_USER_INTERFACE_IDIOM()? If not, should I make two different view controllers? Thanks!

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• Canceling BackgroundWorker within the Thread

  - by Mike Wills

  I have a longer running multi-step process using BackgroundWorker and C#. I need to be sure that each step is completed successfully before moving on to the next step. I have seen many references to letting the BackgroundWorker catch errors and canceling from clicking on a Cancel button, but I want to check for an error myself and then gracefully end the process. Do I treat it just like someone clicked the cancel button, or is there another way?

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• Delphi Component Serialization

  - by Peter

  Has anyone run into issues serializing components into a file and reading them back, specifically in the area where the component vendor upgrades the VCL components. For example a file serialized with DelphiX and then years later read back with delphiY. Do the serialization formats change and if so what can be done to prevent errors reading in the componets when upgrading.

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• JNI dll in Ganymede

  - by Joseph Lim

  How do I import a dll into my dll project in Eclipse Ganymede? I am creating a dll for JNI. I included the .h of the dll but I keep getting errors about the function not referenced... Please help. Thanks.

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• Installing PHP with iconv on Mac OSX 10.6 gives error: "Undefined symbols for architecture x86_64"

  - by Jason

  I am setting up PHP on my local web server with iconv, which should be there by default, but I am getting the following error: Undefined symbols for architecture x86_64: "_iconv", referenced from: __php_iconv_strlen in iconv.o _php_iconv_string in iconv.o __php_iconv_strpos in iconv.o __php_iconv_appendl in iconv.o _zif_iconv_substr in iconv.o _zif_iconv_mime_encode in iconv.o _php_iconv_stream_filter_append_bucket in iconv.o ... (maybe you meant: _zif_iconv_strlen, _zif_iconv_strpos , _zif_iconv_mime_decode , _php_iconv_string , _zif_iconv_set_encoding , _zif_iconv_get_encoding , _zif_iconv_mime_decode_headers , _iconv_functions , _zif_iconv_mime_encode , _zif_iconv_strrpos , _iconv_module_entry , _iconv_globals , _zif_iconv_substr , _php_if_iconv , _zif_ob_iconv_handler ) ld: symbol(s) not found for architecture x86_64 Now, presumably this means that my iconv is not 64 bit. I tried to download libiconv and manually reinstall it with 64 bit, as such: CFLAGS='-arch i386 -arch ppc -arch ppc64 -arch x86_64' CCFLAGS='-arch i386 -arch ppc -arch ppc64 -arch x86_64' CXXFLAGS='-arch i386 -arch ppc -arch ppc64 -arch x86_64' ./configure But I get the following error: configure: error: in `/Users/jason/Downloads/libiconv-1.13.1': configure: error: C compiler cannot create executables See `config.log' for more details. In my config.lob file, it says at the bottom: configure: exit 77 Any suggestions?

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• JavaCC: Please give me links to "real" examples.

  - by java.is.for.desktop

  Hello, everyone! I know that there are many examples of JavaCC parsers here, but they all do nothing. They just accept a string, or produce parsing errors. What I need is a few examples of real parsers, which actually do something during parsing. (Such as building a DOM tree during parsing an XML string). Please help! ;)

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• Can a conforming C implementation #define NULL to be something wacky

  - by janks

  I'm asking because of the discussion that's been provoked in this thread: http://stackoverflow.com/questions/2597142/when-was-the-null-macro-not-0/2597232 Trying to have a serious back-and-forth discussion using comments under other people's replies is not easy or fun. So I'd like to hear what our C experts think without being restricted to 500 characters at a time. The C standard has precious few words to say about NULL and null pointer constants. There's only two relevant sections that I can find. First: 3.2.2.3 Pointers An integral constant expression with the value 0, or such an expression cast to type void * , is called a null pointer constant. If a null pointer constant is assigned to or compared for equality to a pointer, the constant is converted to a pointer of that type. Such a pointer, called a null pointer, is guaranteed to compare unequal to a pointer to any object or function. and second: 4.1.5 Common definitions <stddef.h> The macros are NULL which expands to an implementation-defined null pointer constant; The question is, can NULL expand to an implementation-defined null pointer constant that is different from the ones enumerated in 3.2.2.3? In particular, could it be defined as: #define NULL __builtin_magic_null_pointer Or even: #define NULL ((void*)-1) My reading of 3.2.2.3 is that it specifies that an integral constant expression of 0, and an integral constant expression of 0 cast to type void* must be among the forms of null pointer constant that the implementation recognizes, but that it isn't meant to be an exhaustive list. I believe that the implementation is free to recognize other source constructs as null pointer constants, so long as no other rules are broken. So for example, it is provable that #define NULL (-1) is not a legal definition, because in if (NULL) do_stuff(); do_stuff() must not be called, whereas with if (-1) do_stuff(); do_stuff() must be called; since they are equivalent, this cannot be a legal definition of NULL. But the standard says that integer-to-pointer conversions (and vice-versa) are implementation-defined, therefore it could define the conversion of -1 to a pointer as a conversion that produces a null pointer. In which case if ((void*)-1) would evaluate to false, and all would be well. So what do other people think? I'd ask for everybody to especially keep in mind the "as-if" rule described in 2.1.2.3 Program execution. It's huge and somewhat roundabout, so I won't paste it here, but it essentially says that an implementation merely has to produce the same observable side-effects as are required of the abstract machine described by the standard. It says that any optimizations, transformations, or whatever else the compiler wants to do to your program are perfectly legal so long as the observable side-effects of the program aren't changed by them. So if you are looking to prove that a particular definition of NULL cannot be legal, you'll need to come up with a program that can prove it. Either one like mine that blatantly breaks other clauses in the standard, or one that can legally detect whatever magic the compiler has to do to make the strange NULL definition work. Steve Jessop found an example of way for a program to detect that NULL isn't defined to be one of the two forms of null pointer constants in 3.2.2.3, which is to stringize the constant: #define stringize_helper(x) #x #define stringize(x) stringize_helper(x) Using this macro, one could puts(stringize(NULL)); and "detect" that NULL does not expand to one of the forms in 3.2.2.3. Is that enough to render other definitions illegal? I just don't know. Thanks!

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• Do I need to retain an object if I'm only using it inside the scope of a single method?

  - by morgancodes

  I'm getting weird EXC_BAD_ACCESS errors. I thought that I didn't need to retain objects if I was didn't need them after the method exited, but I want to double-check that. In the following, do I need to retain "tData"? -(void)myMethod:(UITouch*)touch{ TouchData *tData = (TouchData *)CFDictionaryGetValue(datasByUITouch, touch); [tData doSomething]; }

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• Ruby on Rails testing: How can I test or at the very least see a form_for's error_messages_for?

  - by williamjones

  I'm working on creating a tests, and I can't figure out why the creation of a model from a form_for is failing in the test but works in real browsers. Is there a straightforward way for me to see what the problems are in the model creation? Even better would be, is there a straightforward way for me to test the error outputs that I access via error_messages_for? In that case, I'd like to also add in tests that make sure that malformed forms are outputting the correct errors.

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• wget not behaving via IPC::Open3 vs bash

  - by Ryley

  I'm trying to stream a file from a remote website to a local command and am running into some problems when trying to detect errors. The code looks something like this: use IPC::Open3; my @cmd = ('wget','-O','-','http://10.10.1.72/index.php');#any website will do here my ($wget_pid,$wget_in,$wget_out,$wget_err); if (!($wget_pid = open3($wget_in,$wget_out,$wget_err,@cmd))){ print STDERR "failed to run open3\n"; exit(1) } close($wget_in); my @wget_outs = <$wget_out>; my @wget_errs = <$wget_err>; print STDERR "wget stderr: ".join('',@wget_errs); #page and errors outputted on the next line, seems wrong print STDERR "wget stdout: ".join('',@wget_outs); #clean up after this, not shown is running the filtering command, closing and waitpid'ing When I run that wget command directly from the command-line and redirect stderr to a file, something sane happens - the stdout will be the downloaded page, the stderr will contain the info about opening the given page. wget -O - http://10.10.1.72/index.php 2> stderr_test_file When I run wget via open3, I'm getting both the page and the info mixed together in stdout. What I expect is the loaded page in one stream and STDERR from wget in another. I can see I've simplified the code to the point where it's not clear why I want to use open3, but the general plan is that I wanted to stream stdout to another filtering program as I received it, and then at the end I was going to read the stderr from both wget and the filtering program to determine what, if anything went wrong. Other important things: I was trying to avoid writing the wget'd data to a file, then filtering that file to another file, then reading the output. It's key that I be able to see what went wrong, not just reading $? 8 (i.e. I have to tell the user, hey, that IP address is wrong, or isn't the right kind of website, or whatever). Finally, I'm choosing system/open3/exec over other perl-isms (i.e. backticks) because some of the input is provided by untrustworthy users.

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• MySQL data type: Text,,, Erroring: Data Too Long

  - by nobosh

  I have a field as follows in MySQL: Type: Text Length: 0 Decimals: 0 And when I try to insert data around the size of 4 pages of MS Word, Coldfusion errors with: Data Too Long from the DB. I thought TEXT data type was able to expand and handle this size of data? What am I missing and what can I do?

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• Explicitly instantiating a generic member function of a generic structure

  - by Dennis Zickefoose

  I have a structure with a template parameter, Stream. Within that structure, there is a function with its own template parameter, Type. If I try to force a specific instance of the function to be generated and called, it works fine, if I am in a context where the exact type of the structure is known. If not, I get a compile error. This feels like a situation where I'm missing a typename, but there are no nested types. I suspect I'm missing something fundamental, but I've been staring at this code for so long all I see are redheads, and frankly writing code that uses templates has never been my forte. The following is the simplest example I could come up with that illustrates the issue. #include <iostream> template<typename Stream> struct Printer { Stream& str; Printer(Stream& str_) : str(str_) { } template<typename Type> Stream& Exec(const Type& t) { return str << t << std::endl; } }; template<typename Stream, typename Type> void Test1(Stream& str, const Type& t) { Printer<Stream> out = Printer<Stream>(str); /****** vvv This is the line the compiler doesn't like vvv ******/ out.Exec<bool>(t); /****** ^^^ That is the line the compiler doesn't like ^^^ ******/ } template<typename Type> void Test2(const Type& t) { Printer<std::ostream> out = Printer<std::ostream>(std::cout); out.Exec<bool>(t); } template<typename Stream, typename Type> void Test3(Stream& str, const Type& t) { Printer<Stream> out = Printer<Stream>(str); out.Exec(t); } int main() { Test2(5); Test3(std::cout, 5); return 0; } As it is written, gcc-4.4 gives the following: test.cpp: In function 'void Test1(Stream&, const Type&)': test.cpp:22: error: expected primary-expression before 'bool' test.cpp:22: error: expected ';' before 'bool' Test2 and Test3 both compile cleanly, and if I comment out Test1 the program executes, and I get "1 5" as I expect. So it looks like there's nothing wrong with the idea of what I want to do, but I've botched something in the implementation. If anybody could shed some light on what I'm overlooking, it would be greatly appreciated.

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• Change Default Contact Application in Eclipse

  - by Saurabh

  Hi I am running eclipse on windows XP. I am trying to make changes in Default Contact Application and make it a separate apk file. But due to dependancies on other libraries it's showing me compile errors. How can this be resolved? So that I can make a new contact application using current code base. Thanks, Saurabh

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• How to install pecl uploadprogress on Debian Lenny

  - by kidrobot

  I am getting this output/error for # pecl install uploadprogress downloading uploadprogress-1.0.1.tgz ... Starting to download uploadprogress-1.0.1.tgz (8,536 bytes) .....done: 8,536 bytes 4 source files, building running: phpize Configuring for: PHP Api Version: 20041225 Zend Module Api No: 20060613 Zend Extension Api No: 220060519 building in /var/tmp/pear-build-root/uploadprogress-1.0.1 running: /tmp/pear/temp/uploadprogress/configure checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for a sed that does not truncate output... /bin/sed checking for gcc... no checking for cc... no checking for cl.exe... no configure: error: no acceptable C compiler found in $PATH See `config.log' for more details. ERROR: `/tmp/pear/temp/uploadprogress/configure' failed php-pear is installed. I'm stumped.

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• Display\Capture InnerException Message

  - by madlan

  I was using the following to provide more information on a common exception that can occour in a piece of my code, the only problem is this errors if an exception is generated that has no InnerException message. Catch ex As Exception 'MessageBox.Show(ex.Message) 'If there is no InnerException. MessageBox.Show(ex.InnerException.InnerException.Message) End Try Is there a better method of doing this?

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• How can I run jslint as a javascript compile tool in emacs for Windows?

  - by Cheeso

  I'm using GNU Emacs on Win32. I want to be able to run jslint as a compilation on .js files, and then step through the errors that jslint reports. I have jslint, the WScript version.

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