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• Repackaging Jasper-Reports into an application specific OSGi bundle, legal or not?

  - by Chris

  Hi, I wanted to ask (probably a silly) question regarding the packaging of existing open-source components as OSGi bundles (more specifically Jasper Reports). I have an application that I am converting from a monolithic jar-hell type architecture to something more moduler and OSGi is my weapon of choice. There are various modules I have in mind but one of the modules is a reporting module. My own reporting module will be a jar file containing my code that should reference a Jasper Reports bundle. Trouble is, Jasper reports depends on far far too many libraries and is quite monolithic in its own right. I therefore wish to build my own Jasper Reports bundle but this is where I start getting confused about the legality of repackaging. I don't plan to re-compile but I do plan to re-bundle removing known items that I do not require. Can anyone offer advice on whether I am permitted to repackage (not recompile or extend) open-source libraries into OSGi bundles without falling foul of 'derivative works' clause of LGPL? I noticed that Groovy seems to offer some monolithic jars that include all dependancies and actually goes so far as to re-arrange the packages of its dependancies so that there are no namespace conflicts. This seems to me to be a violation of the license but if anyone can reassure me that this is legal then I would feel safer about my less intrusive custom-bundling of Jasper reports. Thanks for your time, Chris

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• Cannot find symbol - variable

  - by Ben Garside

  I'm new to Java, and I'm trying to get user input, store each line of input as a variable and then return each value so that it can be passed on somewhere else. When I try and compile it is telling me that it can't find the variable magnitude. I'm assuming it won't find the others either. I'm guessing that this is because I've declare the variables inside of the "try" but don't know how to get it so that the return statement accepts them. Code is as follows: public Earthquake userAddEarthquake() { Scanner scanner = new Scanner(System.in); try{ // convert the string read from the scanner into Integer type System.out.println("Please Enter An Earthquake Magnitude: "); Double magnitude = Double.parseDouble(scanner.nextLine()); System.out.println("Please Enter The Earthquakes Latitude Position: "); scanner = new Scanner(System.in); Double positionLatitude = Double.parseDouble(scanner.nextLine()); System.out.print("Please Enter The Earthquakes Longitude Position: "); scanner = new Scanner(System.in); Double positionLongitude = Double.parseDouble(scanner.nextLine()); System.out.print("Please Enter The Year That The Earthquake Occured: "); scanner = new Scanner(System.in); int year = Integer.parseInt(scanner.nextLine()); System.out.println("Magnitude = " + magnitude); } catch(NumberFormatException ne){ System.out.println("Invalid Input"); } finally{ scanner.close(); } return new Earthquake(magnitude, positionLatitude, positionLongitude, year); }

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• Perl: Exporting variables in a subclass

  - by Jonathan

  I have a base class like this: package MyClass; use vars qw/$ME list of vars/; use Exporter; @ISA = qw/Exporter/; @EXPORT_OK = qw/ many variables & functions/; %EXPORT_TAGS = (all => \@EXPORT_OK ); sub my_method { } sub other_methods etc { } --- more code--- I want to subclass MyClass, but only for one method. package MySubclass; use MyClass; use vars qw/@ISA/; @ISA = 'MyClass'; sub my_method { --- new method } And I want to call this MySubclass like I would the original MyClass, and still have access to all of the variables and functions from exporter. However I am having problems getting the Exporter variables from the original class, MyClass, to export correctly. Do I need to run exporter again inside the subclass? That seems redundant and unclear. Example file: #!/usr/bin/perl use MySubclass /$ME/; -- rest of code But I get compile errors when I try to import the $ME variable. Any suggestions?

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• string parsing to double fails in C++ (Xcode problem?)

  - by helixed

  Here's a fun one I've been trying to figure out. I have the following program: #include <iostream> #include <string> #include <sstream> using namespace std; int main(int argc, char *argv[]) { string s("5"); istringstream stream(s); double theValue; stream >> theValue; cout << theValue << endl; cout << stream.fail(); } The output is: 0 1 I don't understand why this is failing. Could somebody please tell me what I'm doing wrong? Thanks, helixed EDIT: Okay, sorry to turn this into a double post, but this looks like a problem specific to Xcode. If I compile this in g++, the code works without a problem. Does anybody have an idea why this is happening in Xcode, and how I could possibly fix it? Thanks again, helixed

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• Yacc and Lex inclusion confusion

  - by thejohnmeister

  I am wondering how to correctly compile a program with a Makefile that has calls to yyparse in it? This is what I do: I have a Makefile that compiles all my regular files and they have no connections to y.tab.c or lex.yy.c (Am I supposed to have them?) I do this on top of my code: #include "y.tab.c" #include "lex.yy.c" #include "y.tab.h" This is what happens when I try to make the program: When I just type in "make", it gives me many warnings. Some of the examples are shown below. In function yywrap': /src/parser.y:12: multiple definition ofyywrap' server.o :/src/parser.y:12: first defined here utils.o: In function yyparse': /src/y.tab.c:1175: multiple definition ofyyparse' server.o:/src/y.tab.c:1175: first defined here utils.o I get many different errors referring to different yy_* files. I have compiled successfully with multiple calls to yyparse in the past, but this time seems to be different. It seems an awful lot like an inclusion problem somewhere but I can't tell what it is. All my header files have ifndef conditions, as well. Thanks for your help!

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• Why is Swing Parser's handleText not handling nested tags?

  - by Jim P

  I need to transform some HTML text that has nested tags to decorate 'matches' with a css attribute to highlight it (like firefox search). I can't just do a simple replace (think if user searched for "img" for example), so I'm trying to just do the replace within the body text (not on tag attributes). I have a pretty straightforward HTML parser that I think should do this: final Pattern pat = Pattern.compile(srch, Pattern.CASE_INSENSITIVE); Matcher m = pat.matcher(output); if (m.find()) { final StringBuffer ret = new StringBuffer(output.length()+100); lastPos=0; try { new ParserDelegator().parse(new StringReader(output.toString()), new HTMLEditorKit.ParserCallback () { public void handleText(char[] data, int pos) { ret.append(output.subSequence(lastPos, pos)); Matcher m = pat.matcher(new String(data)); ret.append(m.replaceAll("<span class=\"search\">$0</span>")); lastPos=pos+data.length; } }, false); ret.append(output.subSequence(lastPos, output.length())); return ret; } catch (Exception e) { return output; } } return output; My problem is, when I debug this, the handleText is getting called with text that includes tags! It's like it's only going one level deep. Anyone know why? Is there some simple thing I need to do to HTMLParser (haven't used it much) to enable 'proper' behavior of nested tags? PS - I figured it out myself - see answer below. Short answer is, it works fine if you pass it HTML, not pre-escaped HTML. Doh! Hope this helps someone else. <span>example with <a href="#">nested</a> <p>more nesting</p> </span> <!-- all this gets thrown together -->

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• Generating equals / hashcode / toString using annotation

  - by Bruno Bieth

  I believe I read somewhere people generating equals / hashcode / toString methods during compile time (using APT) by identifying which fields should be part of the hash / equality test. I couldn't find anything like that on the web (I might have dreamed it ?) ... That could be done like that : public class Person { @Id @GeneratedValue private Integer id; @Identity private String firstName, lastName; @Identity private Date dateOfBirth; //... } For an entity (so we want to exlude some fields, like the id). Or like a scala case class i.e a value object : @ValueObject public class Color { private int red, green, blue; } Not only the file becomes more readable and easier to write, but it also helps ensuring that all the attributes are part of the equals / hashcode (in case you add another attribute later on, without updating the methods accordingly). I heard APT isn't very well supported in IDE but I wouldn't see that as a major issue. After all, tests are mainly run by continuous integration servers. Any idea if this has been done already and if not why ? Thanks

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• Why do I get "file is not of required architecture" when I try to build my app on an iphone?

  - by Dale

  My app seemingly runs fine in the simulator but the first time I hooked a phone up to my system and had it build for it I got a huge error log with things like: Build SCCUI of project SCCUI with configuration Debug CompileXIB HandleAlert.xib cd /Users/gdbriggs/Desktop/SCCUI setenv IBC_MINIMUM_COMPATIBILITY_VERSION 3.1 setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr /bin:/usr/bin:/bin:/usr/sbin:/sbin" /Developer/usr/bin/ibtool --errors --warnings --notices --output-format human-readable-text --compile /Users/gdbriggs/Desktop/SCCUI/build/Debug-iphoneos/SCCUI.app/HandleAlert.nib /Users/gdbriggs/Desktop/SCCUI/HandleAlert.xib /* com.apple.ibtool.document.warnings */ /Users/gdbriggs/Desktop/SCCUI/HandleAlert.xib:13: warning: UITextView does not support data detectors when the text view is editable. Ld build/Debug-iphoneos/SCCUI.app/SCCUI normal armv6 cd /Users/gdbriggs/Desktop/SCCUI setenv IPHONEOS_DEPLOYMENT_TARGET 3.1 setenv MACOSX_DEPLOYMENT_TARGET 10.5 setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc-4.2 -arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.sdk -L/Users/gdbriggs/Desktop/SCCUI/build/Debug-iphoneos -F/Users/gdbriggs/Desktop/SCCUI/build/Debug-iphoneos -F/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.sdk/System/Library/Frameworks -filelist /Users/gdbriggs/Desktop/SCCUI/build/SCCUI.build/Debug-iphoneos/SCCUI.build/Objects-normal/armv6/SCCUI.LinkFileList -mmacosx-version-min=10.5 -dead_strip -miphoneos-version-min=3.1 -framework Foundation -framework UIKit -framework CoreGraphics -framework MessageUI -o /Users/gdbriggs/Desktop/SCCUI/build/Debug-iphoneos/SCCUI.app/SCCUI ld: warning: in /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.sdk/System/Library/Frameworks/Foundation.framework/Foundation, file is not of required architecture ld: warning: in /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.sdk/System/Library/Frameworks/UIKit.framework/UIKit, file is not of required architecture ld: warning: in /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.sdk/System/Library/Frameworks/CoreGraphics.framework/CoreGraphics, file is not of required architecture ld: warning: in /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.sdk/System/Library/Frameworks/MessageUI.framework/MessageUI, file is not of required architecture Undefined symbols: "_OBJC_CLASS_$_UIDevice", referenced from: __objc_classrefs__DATA@0 in SCAuthenticationHandler.o "_OBJC_CLASS_$_NSString", referenced from: __objc_classrefs__DATA@0 in CCProxy.o __objc_classrefs__DATA@0 in AlertSummaryViewController.o __objc_classrefs__DATA@0 in HomeLevelController.o __objc_classrefs__DATA@0 in SCAuthenticationHandler.o __objc_classrefs__DATA@0 in SCRequestHandler.o "_UIApplicationMain", referenced from: _main in main.o "_objc_msgSend", referenced from: _main in main.o _main in main.o _main in main.o -[SCCUIAppDelegate applicationDidFinishLaunching:] in and it just keeps going. At / near the bottom it says: ld: symbol(s) not found collect2: ld returned 1 exit status What am I doing wrong?

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• Titanium Appcelerator - After enabling cloud services I get UnicodeDecodeError when compiling for Android

  - by Shahar Zrihen

  I've got an app that has a UTF8 name (hebrew). I use the platform/android/AndroidManifest.xml file for this. I've managed to narrow it down to the Ti.cloudpush module. only when I enable this module I get the error. I used to be able to compile it to android without any issues but as soon as I enable cloud services I get this error - [ERROR] Exception occured while building Android project: [ERROR] Traceback (most recent call last): [ERROR] File "/Users/Shahar/Library/Application Support/Titanium/mobilesdk/osx/2.1.0.GA/android/builder.py", line 2218, in <module> [ERROR] s.build_and_run(True, None, key, password, alias, output_dir) [ERROR] File "/Users/Shahar/Library/Application Support/Titanium/mobilesdk/osx/2.1.0.GA/android/builder.py", line 1970, in build_and_run [ERROR] self.manifest_changed = self.generate_android_manifest(compiler) [ERROR] File "/Users/Shahar/Library/Application Support/Titanium/mobilesdk/osx/2.1.0.GA/android/builder.py", line 1195, in generate_android_manifest [ERROR] custom_manifest_contents = fill_manifest(custom_manifest_contents) [ERROR] File "/Users/Shahar/Library/Application Support/Titanium/mobilesdk/osx/2.1.0.GA/android/builder.py", line 1122, in fill_manifest [ERROR] manifest_source = manifest_source.replace(ti_permissions,permissions_required_xml) [ERROR] UnicodeDecodeError: 'ascii' codec can't decode byte 0xd7 in position 501: ordinal not in range(128) and this is my manifest file with the part that causes the issues. If I remove the hebrew name, it compiles without any issues <application android:icon="@drawable/appicon" android:label="??????" android:name="QuestionnaireApplication" android:debuggable="false" > <activity android:name=".QuestionnaireActivity" android:label="??????" android:theme="@style/Theme.Titanium" android:screenOrientation="portrait" android:configChanges="keyboardHidden" > Any suggestions?

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• Problem Linking Boost Filesystem Library in Microsoft Visual C++

  - by Scott

  Hello. I am having trouble getting my project to link to the Boost (version 1.37.0) Filesystem lib file in Microsoft Visual C++ 2008 Express Edition. The Filesystem library is not a header-only library. I have been following the Getting Started on Windows guide posted on the official boost web page. Here are the steps I have taken: I used bjam to build the complete set of lib files using: bjam --build-dir="C:\Program Files\boost\build-boost" --toolset=msvc --build-type=complete I copied the /libs directory (located in C:\Program Files\boost\build-boost\boost\bin.v2) to C:\Program Files\boost\boost_1_37_0\libs. In Visual C++, under Project Properties Additional Library Directories I added these paths: C:\Program Files\boost\boost_1_37_0\libs C:\Program Files\boost\boost_1_37_0\libs\filesystem\build\msvc-9.0express\debug\link-static\threading-multi I added the second one out of desperation. It is the exact directory where libboost_system-vc90-mt-gd-1_37.lib resides. In Configuration Properties C/C++ General Additional Include Directories I added the following path: C:\Program Files\boost\boost_1_37_0 Then, to put the icing on the cake, under Tools Options VC++ Directories Library files, I added the same directories mentioned in step 3. Despite all this, when I build my project I get the following error: fatal error LNK1104: cannot open file 'libboost_system-vc90-mt-gd-1_37.lib' Additionally, here is the code that I am attempting to compile as well as a screen shot of the aformentioned directory where the (assumedly correct) lib file resides: #include "boost/filesystem.hpp" // includes all needed Boost.Filesystem declarations #include <iostream> // for std::cout using boost::filesystem; // for ease of tutorial presentation; // a namespace alias is preferred practice in real code using namespace std; int main() { cout << "Hello, world!" << endl; return 0; } Can anyone help me out? Let me know if you need to know anything else. As always, thanks in advance.

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• Constant error in compiler using C#'s provided objects

  - by dotnetdev

  I have used the built in C# methods to write a compiler, like the following: CodeDomProvider codeProvider = CodeDomProvider.CreateProvider("CSharp"); string Output = "Out.exe"; Button ButtonObject = (Button)sender; this.RadTextBox1.Text = string.Empty; System.CodeDom.Compiler.CompilerParameters parameters = new CompilerParameters(); //Make sure we generate an EXE, not a DLL parameters.GenerateExecutable = true; parameters.OutputAssembly = Output; CompilerResults results = codeProvider.CompileAssemblyFromSource(parameters, RadTextBox1.Text); if (results.Errors.Count > 0) { RadTextBox2.ForeColor = Color.Red; foreach (CompilerError CompErr in results.Errors) { RadTextBox2.Text = RadTextBox2.Text + "Line number " + CompErr.Line + ", Error Number: " + CompErr.ErrorNumber + ", '" + CompErr.ErrorText + ";" + Environment.NewLine + Environment.NewLine; } } else { //Successful Compile RadTextBox2.ForeColor = Color.Blue; Guid guid = Guid.NewGuid(); string PathToExe = Server.MapPath(Path.Combine(@"\Compiled" , Output)); FileStream fs = System.IO.File.Create(PathToExe); using (StreamWriter sw = new StreamWriter(fs)) { sw.Write(RadTextBox1.Text); } Response.WriteFile(PathToExe); When I run this code and write a Main method (such as the code sample in http://msdn.microsoft.com/en-us/library/ms228506(VS.80).aspx, I get this error: Line number 0, Error Number: CS5001, 'Program 'c:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\Out.exe' does not contain a static 'Main' method suitable for an entry point; The code above is used as the basis of a compiler on my site (not yet live). So you type in code and generate an .exe assembly. But when I enter code into the textbox for code writing (Radtextbox1), even with a main method, I get the error. What gives? Thanks

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• Google Javascript v8 - multithreading

  - by willem

  Hi guys Suppose I have the following piece of code bool run (void) { HandleScope hande_scope; Handle<String> source; Local<Script> script; Persistent<Context> context; context = Context::New(); Context::Scope context_scope(context); script = Script::Compile("var a = 1; var b = 2;"); Local<Value> result = script->Run(); if (result.IsEmpty()) return false; else return true; } Is it true that one cannot execute this code using multiple threads? It seems like HandleScope is not designed to be used in multithreaded applications. I can use the v8::Locker and v8::Unlocker methodes but that would always give me execution traces as this: t1: a = 1 t1: b = 2 t2: a = 1 t2: b = 2 I hope someone can give me a hint on getting this code multithreaded so that a possible execution trace could like this: t1: a = 1 t2: a = 1 t1: b = 2 t2: b = 2 Thanks already in advance! Willem -- EDIT -- So I guess that this question has no answer :)

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• JVM/CLR Source-compatible Language Options

  - by Nathan Voxland

  I have an open source Java database migration tool (http://www.liquibase.org) which I am considering porting to .Net. The majority of the tool (at least from a complexity side) is around logic like "if you are adding a primary key and the database is Oracle use this SQL. If database is MySQL use this SQL. If the primary key is named and the database is Postgres use this SQL". I could fork the Java codebase and covert it (manually and/or automatically), but as updates and bug fixes to the above logic come in I do not want to have to apply it to both versions. What I would like to do is move all that logic into a form that can be compiled and used by both Java and .Net versions naively. The code I am looking to convert does not contain any advanced library usage (JDBC, System.out, etc) that would vary significantly from Java to .Net, so I don't think that will be an issue (at worst it can be designed around). So what I am looking for is: A language in which I can code common parts of my app in and compile it into classes usable by the "standard" languages on the target platform Does not add any runtime requirements to the system Nothing so strange that it scares away potential contributors I know Python and Ruby both have implementations on for the JVM and CLR. How well do they fit my requirements? Has anyone been successful (or unsuccesful) using this technique for cross-platform applications? Are there any gotcha's I need to worry about?

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• Installing Gtk2 on portable strawberry

  - by XoR

  I downloaded "strawberry-perl-5.12.2.0-portable" and "gtk+-bundle_2.22.1-20101227_win32". I extracted strawberry-perl in some directory and there I put gtk folder with gtk stuff. In portableshell.bat I changed Path env and added: "%drivep%\gtk\bin;%drivep%\gtk\lib;". Don't ask me why I added lib directory, I saw that some guy added it in some website. When I run in portableshell command: "pkg-config --libs --cflags gtk+-2.0" I get: c:\test>pkg-config --libs --cflags gtk+-2.0 -mms-bitfields -Ic:/test/gtk/include/gtk-2.0 -Ic:/test/gtk/lib/gtk-2.0/include - Ic:/test/gtk/include/atk-1.0 -Ic:/test/gtk/include/cairo -Ic:/test/gtk/include/g dk-pixbuf-2.0 -Ic:/test/gtk/include/pango-1.0 -Ic:/test/gtk/include/glib-2.0 -Ic :/test/gtk/lib/glib-2.0/include -Ic:/test/gtk/include -Ic:/test/gtk/include/free type2 -Ic:/test/gtk/include/libpng14 -Lc:/test/gtk/lib -lgtk-win32-2.0 -lgdk-wi n32-2.0 -latk-1.0 -lgio-2.0 -lpangowin32-1.0 -lgdi32 -lpangocairo-1.0 -lgdk_pixb uf-2.0 -lpango-1.0 -lcairo -lgobject-2.0 -lgmodule-2.0 -lgthread-2.0 -lglib-2.0 -lintl All folders looks fine, I also have complete log of compiling glib here. It looks like it doesn't compile because pkg-config gives bad data, or something. Does anyone have some idea how to make this thing work?

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• Trouble getting started with Spring Roo and GWT

  - by Abdel Olakara

  Hi all, I am trying to get started with SpringRoo and GWT after seeing the keynote.. unfortunately I am stuck at this issue. I successfully created the project using Roo and added the persistence, the entities and when I perform the command "perform package" I get this error: 23/5/10 12:10:13 AM AST: [ERROR] ApplicationEntityTypesProcessor cannot be resolved 23/5/10 12:10:13 AM AST: [ERROR] ApplicationEntityTypesProcessor cannot be resolved to a type 23/5/10 12:10:13 AM AST: [WARN] advice defined in org.springframework.mock.staticmock.AnnotationDrivenStaticEntityMockingControl has not been applied [Xlint:adviceDidNotMatch] 23/5/10 12:10:13 AM AST: [WARN] advice defined in org.springframework.mock.staticmock.AbstractMethodMockingControl has not been applied [Xlint:adviceDidNotMatch] 23/5/10 12:10:13 AM AST: Build errors for helloroo; org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.codehaus.mojo:aspectj-maven-plugin:1.0:compile (default) on project helloroo: Compiler errors : error at import tp.gwt.request.ApplicationEntityTypesProcessor; I see this in the Maven console and cannot complete the build..I know there is some jar missing but how and why? because I downloaded all the latest version including GWT milestone release. Any idea why this error is occurring? How do I resolve this issue? Thanks in Advance, Abdel Olakara

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• Python Pre-testing for exceptions when coverage fails

  - by Tal Weiss

  I recently came across a simple but nasty bug. I had a list and I wanted to find the smallest member in it. I used Python's built-in min(). Everything worked great until in some strange scenario the list was empty (due to strange user input I could not have anticipated). My application crashed with a ValueError (BTW - not documented in the official docs). I have very extensive unit tests and I regularly check coverage to avoid surprises like this. I also use Pylint (everything is integrated in PyDev) and I never ignore warnings, yet I failed to catch this bug before my users did. Is there anything I can change in my methodology to avoid these kind of runtime errors? (which would have been caught at compile time in Java / C#?). I'm looking for something more than wrapping my code with a big try-except. What else can I do? How many other build in Python functions are hiding nasty surprises like this???

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• Academic question: typename

  - by Arman

  Hi, recently I accounted with a "simple problem" of porting code from VC++ to gcc/intel. The code is compiles w/o error on VC++: #include <vector> using std::vector; template <class T> void test_vec( std::vector<T> &vec) { typedef std::vector<T> M; /*==> add here typename*/ M::iterator ib=vec.begin(),ie=vec.end(); }; int main() { vector<double> x(100, 10); test_vec<double>(x); return 0; } then with g++ we have some unclear errors: g++ t.cpp t.cpp: In function 'void test_vec(std::vector<T, std::allocator<_CharT> >&)': t.cpp:13: error: expected `;' before 'ie' t.cpp: In function 'void test_vec(std::vector<T, std::allocator<_CharT> >&) [with T = double]': t.cpp:18: instantiated from here t.cpp:12: error: dependent-name 'std::M::iterator' is parsed as a non-type, but instantiation yields a type t.cpp:12: note: say 'typename std::M::iterator' if a type is meant If we add typename before iterator the code will compile w/o pb. If it is possible to make a compiler which can understand the code written in the more "natural way", then for me is unclear why we should add typename? Which rules of "C++ standards"(if there are some) will be broken if we allow all compilers to use without "typename"? kind regards Arman.

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• C malloc assertion help

  - by Chris

  I am implementing a divide and conquer polynomial algorithm so i can bench it against an opencl implementation, but i can't seem to get malloc to work. When I run the program it allocates a bunch of stuff, checks some things, then sends the size/2 to the algorithm. Then when I hit the malloc line again it spits out this: malloc.c:3096: sYSMALLOc: Assertion `(old_top == (((mbinptr) (((char *) &((av)-bins[((1) - 1) * 2])) - __builtin_offsetof (struct malloc_chunk, fd)))) && old_size == 0) || ((unsigned long) (old_size) = (unsigned long)((((__builtin_offsetof (struct malloc_chunk, fd_nextsize))+((2 * (sizeof(size_t))) - 1)) & ~((2 * (sizeof(size_t))) - 1))) && ((old_top)-size & 0x1) && ((unsigned long)old_end & pagemask) == 0)' failed. Aborted The line in question is: int *out, .....other vars....; out = (int *)malloc(sizeof(int) * size * 2); I have checked size with fprintf and it is a positive int (usually 50 at that point). I have tried calling malloc with a plain number as well and i still get the error. I'm just stumped at what's going on, and nothing from google that I have found so far has been too helpful. Any ideas what's going on? I'm trying to figure out how to compile a newer GCC in case it's a compiler error, but i really doubt it.

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• Is there an easy way to get the Scala REPL to reload a class or package?

  - by Rex Kerr

  I almost always have a Scala REPL session or two open, which makes it very easy to give Java or Scala classes a quick test. But if I change a class and recompile it, the REPL continues with the old one loaded. Is there a way to get it to reload the class, rather than having to restart the REPL? Just to give a concrete example, suppose we have the file Test.scala: object Test { def hello = "Hello World" } We compile it and start the REPL: ~/pkg/scala-2.8.0.Beta1-prerelease$ bin/scala Welcome to Scala version 2.8.0.Beta1-prerelease (Java HotSpot(TM) Server VM, Java 1.6.0_16). Type in expressions to have them evaluated. Type :help for more information. scala> Test.hello res0: java.lang.String = Hello World Then we change the source file to object Test { def hello = "Hello World" def goodbye = "Goodbye, Cruel World" } but we can't use it: scala> Test.goodbye <console>:5: error: value goodbye is not a member of object Test Test.goodbye ^ scala> import Test; <console>:1: error: '.' expected but ';' found. import Test;

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• forward/strong enum in VS2010

  - by Noah Roberts

  At http://blogs.msdn.com/vcblog/archive/2010/04/06/c-0x-core-language-features-in-vc10-the-table.aspx there is a table showing C++0x features that are implemented in 2010 RC. Among them are listed forwarding enums and strongly typed enums but they are listed as "partial". The main text of the article says that this means they are either incomplete or implemented in some non-standard way. So I've got VS2010RC and am playing around with the C++0x features. I can't figure these ones out and can't find any documentation on these two features. Not even the simplest attempts compile. enum class E { test }; int main() {} fails with: 1e:\dev_workspace\experimental\2010_feature_assessment\2010_feature_assessment\main.cpp(518): error C2332: 'enum' : missing tag name 1e:\dev_workspace\experimental\2010_feature_assessment\2010_feature_assessment\main.cpp(518): error C2236: unexpected 'class' 'E'. Did you forget a ';'? 1e:\dev_workspace\experimental\2010_feature_assessment\2010_feature_assessment\main.cpp(518): error C3381: 'E' : assembly access specifiers are only available in code compiled with a /clr option 1e:\dev_workspace\experimental\2010_feature_assessment\2010_feature_assessment\main.cpp(518): error C2143: syntax error : missing ';' before '}' 1e:\dev_workspace\experimental\2010_feature_assessment\2010_feature_assessment\main.cpp(518): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== int main() { enum E : short; } Fails with: 1e:\dev_workspace\experimental\2010_feature_assessment\2010_feature_assessment\main.cpp(513): warning C4480: nonstandard extension used: specifying underlying type for enum 'main::E' 1e:\dev_workspace\experimental\2010_feature_assessment\2010_feature_assessment\main.cpp(513): error C2059: syntax error : ';' ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== So it seems it must be some totally non-standard implementation that has allowed them to justify calling this feature "partially" done. How would I rewrite that code to access the forwarding and strong type feature?

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• Using GKPeerPickerController within a selector from a Cocos2D CCMenuItem

  - by Mark Hazlett

  Hey everyone, So i'm trying to use GameKit along with Cocos2D so that when a user clicks on the multiplayer menu item it will display the GKPeerPickerController. I'm however, running into some snags. It doesn't seem to want to compile. However, it doesn't give me an error inside of the code that's in my selector. Anyways here's the code... @implementation GameOverLayer - (id) init { self = [super init]; if (self != nil) { [CCMenuItemFont setFontSize:20]; [CCMenuItemFont setFontName:@"Helvetica"]; CCMenuItem *start = [CCMenuItemFont itemFromString:@"Play Again!" target:self selector:@selector(startGame:)]; CCMenuItem *connect = [CCMenuItemFont itemFromString:@"Multiplayer" target:self selector:@selector(connect:)]; CCMenu *menu = [CCMenu menuWithItems:start,connect, nil]; [menu alignItemsVertically]; [self addChild:menu]; } return self; } -(void)startGame: (id)sender { [[CCDirector sharedDirector] replaceScene: [HelloWorld scene]]; } -(void)connect: (id)sender { GKPeerPickerController *peerPicker; peerPicker = [[GKPeerPickerController alloc] init]; peerPicker.delegate = self; peerPicker.connectionTypesMask = GKPeerPickerConnectionTypeOnline | GKPeerPickerConnectionTypeNearby; [peerPicker show]; } @end The error message i'm getting is... ".obj_class_name_GKPeerPickerController", referenced from: Literal-Pointer@_OBJC@_cls_refs@GKPeerPickerController in GameOverScene.o Symbol(s) not found Collect2: id returned 1 exit status Any ideas?

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• IntelliJ IDEA plugin development: Get classes VirtualFile (or paths) for a specific source VirtualFi

  - by Ran Biron

  Hi all. This is a cross-post from http://www.jetbrains.net/devnet/message/5264436#5264436 - I failed to get any answer on that forum for two weeks now, so I'm re-asking it here (please don't flame). This question refers to plugin development for the IntelliJ IDEA IDE, specifically targeting java development: Is there any API to get the list of .class files for given source file? I'm trying to write a plugin that creates a binary patch jar based on a changelist. I've managed to get the changelist and, from it, a list of source files (VirtualFile). Now I'm trying to get the compiled class files for these source files (I don't mind preforming a "make" or relying on the previous compile output). I've played a bit with ProjectFileIndex but could only find the classes root. I'd hate to do a "dumb" path-based search because inner classes (and inner anonymous classes) would make it difficult to get correctly. Is there such an API? Or am I doomed to parse the paths? Thanks, Ran.

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• How to create resource manager in ASP.NET

  - by Bart

  Hello, I would like to create resource manager on my page and use some data stored in my resource files. (default.aspx.resx and default.aspx.en.resx) The code looks like this: System.Resources.ResourceManager myResourceManager = System.Resources.ResourceManager.CreateFileBasedResourceManager("resource", Server.MapPath("App_LocalResources") + Path.DirectorySeparatorChar, null); if (User.Identity.IsAuthenticated) { Welcome.Text = myResourceManager.GetString("LoggedInWelcomeText"); } else { Welcome.Text = myResourceManager.GetString("LoggedOutWelcomeText"); } but when i compile and run it on my local server i get this type of error: Could not find any resources appropriate for the specified culture (or the neutral culture) on disk. baseName: resource locationInfo: fileName: resource.resources Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Resources.MissingManifestResourceException: Could not find any resources appropriate for the specified culture (or the neutral culture) on disk. baseName: resource locationInfo: fileName: resource.resources Source Error: Line 89: else Line 90: { Line 91: Welcome.Text = myResourceManager.GetString("LoggedOutWelcomeText"); Line 92: } Line 93: can you please assist me with this issue?

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• Why is an Add method required for { } initialization?

  - by Dan Tao

  To use initialization syntax like this: var contacts = new ContactList { { "Dan", "[email protected]" }, { "Eric", "[email protected]" } }; ...my understanding is that my ContactList type would need to define an Add method that takes two string parameters: public void Add(string name, string email); What's a bit confusing to me about this is that the { } initializer syntax seems most useful when creating read-only or fixed-size collections. After all it is meant to mimic the initialization syntax for an array, right? (OK, so arrays are not read-only; but they are fixed size.) And naturally it can only be used when the collection's contents are known (at least the number of elements) at compile-time. So it would almost seem that the main requirement for using this collection initializer syntax (having an Add method and therefore a mutable collection) is at odds with the typical case in which it would be most useful. I'm sure I haven't put as much thought into this matter as the C# design team; it just seems that there could have been different rules for this syntax that would have meshed better with its typical usage scenarios. Am I way off base here? Is the desire to use the { } syntax to initialize fixed-size collections not as common as I think? What other factors might have influenced the formulation of the requirements for this syntax that I'm simply not thinking of?

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• dotnetopenauth with asp.net mvc proving too frustrating to use.

  - by Stacey

  I've been trying excessively hard to implement a good open id solution into asp.net mvc - and everywhere I turn is absolute dead ends. DotNetOpenAuth is just too big and I have been thusfar unable to get even the most simplistic, basic, absolute cut and dry implementation of it to work. NerdDinner had a promising implementation, but it is impossible to track down all of the dependant files and scripts. The DotNetOpenAuth website has virtually no information that helps, either, unfortunately. Does ANYONE know of a simple approach to just implementing this that actually explains and details how it is working with some kind of selector? It is talked about so much, but everything I find for it is so difficult to work with that it is really putting my whole team off from even considering it. We want to implement it similar to how stack overflow already does - using a selector that'll popup a login page if it needs to. I realize there is a lot of code that needs to be done for this, but everything just hails and praises dotnetopenauth, and nothing really teaches it. Even the sample projects do not open or compile. It looks like a wonderful library - but it really just isn't clicking for me.

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