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  • Computer science undergraduate project ideas

    - by Mehrdad Afshari
    Hopefully, I'm going to finish my undergraduate studies next semester and I'm thinking about the topic of my final project. And yes, I've read the questions with duplicate title. I'm asking this from a bit different viewpoint, so it's not an exact dupe. I've spent at least half of my life coding stuff in different languages and frameworks so I'm not looking at this project as a way to learn much about coding and preparing for real world apps or such. I've done lots of those already. But since I have to do it to complete my degree, I felt I should spend my time doing something useful instead of throwing the whole thing out. I'm planning to make it an open source project or a hosted Web app (depending on the type) if I can make a high quality thing out of it, so I decided to ask StackOverflow what could make a useful project. Situation I've plenty of freedom about the topic. They also require 30-40 pages of text describing the project. I have the following points in mind (the more satisfied, the better): Something useful for software development Something that benefits the community Having academic value is great Shouldn't take more than a month of development (I know I'm lazy). Shouldn't be related to advanced theoretical stuff (soft computing, fuzzy logic, neural networks, ...). I've been a business-oriented software developer. It should be software oriented. While I love hacking microcontrollers and other fun embedded electronic things, I'm not really good at soldering and things like that. I'm leaning toward a Web application (think StackOverflow, PasteBin, NerdDinner, things like those). Technology It's probably going to be done in .NET (C#, F#) and Windows platform. If I really like the project (cool low level hacking), I might actually slip to C/C++. But really, C# is what I'm efficient at. Ideas Programming language, parsing and compiler related stuff: Designing a domain specific programming language and compiler Templating language compiled to C# or IL Database tools and related code generation stuff Web related technologies: ASP.NET MVC View engine doing something cool (don't know what exactly...) Specific-purpose, small, fast ASP.NET-based Web framework Applications: Visual Studio plugin to integrate with Bazaar (it's too much work, I think). ASP.NET based, jQuery-powered issue tracker (and possibly, project lifecycle management as a whole - poor man's TFS) Others: Something related to GPGPU Looking forward for great ideas! Unfortunately, I can't help on a currently existing project. I need to start my own to prevent further problems (as it's an undergrad project, nevertheless).

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  • How to compile a perl script (.pl) to a windows executable (.exe) with Strawberry Perl

    - by Notitze
    What would be the easiest way to compile a simple perl script to an executable under windows with Strawberry Perl (as I understand it's possible and free). In the past I've used ActiveState compiler and perl2exe and was simple enough ... however, now after a few computer changes and OS updates I've lost the licenses and I'd like to find a better/permanent solution. Thanks in advance!

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  • Good Delphi Blogs?

    - by Andreas Rejbrand
    I just saw http://pages.cs.wisc.edu/~rkennedy/ which appears to be a very interesting in-depth blog about the Delphi programming language, compiler, and IDE. At the more basic level we also have the About site, and DelphiBasics. You can also have fun for a few minutes at http://www.scalabium.com/faq/dc_tips.htm. What are the most interesting blogs and sites devoted to Delphi? I am in particular interested in content at the advanced level.

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  • Visual Studio Express 2010 license

    - by Mark
    Can I use Visual C++ 2010 Express compiler for commercial use? As far as I know, it was always permitted prior to 2010 version, but now when I start IDE, it writes "For Evaluation Purposes Only". I can't find the full license file anywhere (not in installed files, not in Google), so I'm in doubt, should I use it, or should I downgrade to MSVC++2008 version.

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  • iPhone MapKit problems: viewForAnnotation inconsistently setting pinColor?

    - by blackkettle
    Hi, I'm trying setup a map that displays different pin colors depending on the type/class of the location in question. I know this is a pretty common thing to do, but I'm having trouble getting the viewForAnnotation delegate to consistently update/set the pin color. I have a showThisLocation function that basically cycles through a list of AddressAnnotations and then based on the annotation class (bus stop, hospital, etc.) I set an if( myClass == 1){ [defaults setObject:@"1" forKey:@"currPinColor"]; [defaults synchronize]; NSLog(@"Should be %@!", [defaults objectForKey:@"currPinColor"]); } else if( myClass ==2 ){ [defaults setObject:@"2" forKey:@"currPinColor"]; [defaults synchronize]; NSLog(@"Should be %@!", [defaults objectForKey:@"currPinColor"]); } [_mapView addAnnotation:myCurrentAnnotation]; then my viewForAnnotation delegate looks like this, - (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id )annotation { if( annotation == mapView.userLocation ){ return nil; } NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; MKPinAnnotationView *annView = nil; annView = (MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:@"currentloc"]; if( annView == nil ){ annView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"currentloc"]; } annView.pinColor = [defaults integerForKey:@"currPinColor"]; NSLog(@"Pin color: %d", [defaults integerForKey:@"currPinColor"]); annView.animatesDrop=TRUE; annView.canShowCallout = YES; annView.calloutOffset = CGPointMake(-5, 5); return annView; } The problem is that, although the NSLog statements in the "if" block always confirm that the color has been set, the delegate sometimes but not always ends up with the correct color. I've also noticed that what generally happens is that the first search for a new location will set all pins to the last color in the "if" block, but search for the same location again will set the pins to the correct color. I suspect I am not supposed to usen NSUserDefaults in this way, but I also tried to create my own subclass for MKAnnotation which included an additional property "currentPinColor", and while this allowed me to set the "currentPinColor", when I tried to access the "currentPinColor from the delegate method, the compiler complained that it didn't know anything about "currentPinColor in connection with MKAnnotation. Fair enough I guess, but then I tried to revise the delegate method, - (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id )annotation instead of the default - (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id )annotation at which point the compiler complained that it didn't know anything about the protocol for MyCustomMKAnnotation in this delegate context. What is the proper way to set the delegate method and/or MyCustomMKAnnotation, or what is the appropriate way to achieve consistent pinColor settings. I'm just about out of ideas for things to try here.

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  • Mismatch between the program and library build versions detected

    - by Alex Farber
    I built wxWidgets on Linux using this command: ../configure --enable-shared --disable-debug It see results of this build: /usr/local/lib/wx/config/gtk2-ansi-release-2.8 /usr/local/lib/wx/include/gtk2-ansi-release-2.8/wx/setup.h wx-config output: alex@alex-linux:~$ wx-config --list Default config is gtk2-ansi-release-2.8 Default config will be used for output Alternate matches: gtk2-ansi-debug-2.8 gtk2-ansi-debug-static-2.8 gtk2-ansi-release-static-2.8 alex@alex-linux:~$ wx-config --cppflags --release 2.8 -I/usr/local/lib/wx/include/gtk2-ansi-release-2.8 -I/usr/local/include/wx-2.8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -D__WXGTK__ alex@alex-linux:~$ wx-config --libs --release 2.8 -L/usr/local/lib -pthread -lwx_gtk2_richtext-2.8 -lwx_gtk2_aui-2.8 -lwx_gtk2_xrc-2.8 -lwx_gtk2_qa-2.8 -lwx_gtk2_html-2.8 -lwx_gtk2_adv-2.8 -lwx_gtk2_core-2.8 -lwx_base_xml-2.8 -lwx_base_net-2.8 -lwx_base-2.8 Now I am trying to build Hello wxWidgets program with Release version: g++ -I/usr/local/lib/wx/include/gtk2-ansi-release-2.8 -I/usr/local/include/wx-2.8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -D__WXGTK__ hello.cpp -o hello -L/usr/local/lib -pthread -lwx_gtk2_richtext-2.8 -lwx_gtk2_aui-2.8 -lwx_gtk2_xrc-2.8 -lwx_gtk2_qa-2.8 -lwx_gtk2_html-2.8 -lwx_gtk2_adv-2.8 -lwx_gtk2_core-2.8 -lwx_base_xml-2.8 -lwx_base_net-2.8 -lwx_base-2.8 It compiles and runs successfully on my computer. Program dependencies: ldd hello linux-gate.so.1 = (0x006ef000) libwx_gtk2_richtext-2.8.so.0 = /usr/local/lib/libwx_gtk2_richtext-2.8.so.0 (0x00253000) libwx_gtk2_aui-2.8.so.0 = /usr/local/lib/libwx_gtk2_aui-2.8.so.0 (0x005ff000) libwx_gtk2_xrc-2.8.so.0 = /usr/local/lib/libwx_gtk2_xrc-2.8.so.0 (0x00110000) libwx_gtk2_qa-2.8.so.0 = /usr/local/lib/libwx_gtk2_qa-2.8.so.0 (0x00a3c000) libwx_gtk2_html-2.8.so.0 = /usr/local/lib/libwx_gtk2_html-2.8.so.0 (0x0019d000) libwx_gtk2_adv-2.8.so.0 = /usr/local/lib/libwx_gtk2_adv-2.8.so.0 (0x00c18000) libwx_gtk2_core-2.8.so.0 = /usr/local/lib/libwx_gtk2_core-2.8.so.0 (0x00ef8000) libwx_base_xml-2.8.so.0 = /usr/local/lib/libwx_base_xml-2.8.so.0 (0x0047e000) libwx_base_net-2.8.so.0 = /usr/local/lib/libwx_base_net-2.8.so.0 (0x00353000) libwx_base-2.8.so.0 = /usr/local/lib/libwx_base-2.8.so.0 (0x006f0000) ... Now I want to execute this program on another computer without wxWidgets installed. I copy the program and all shared libraries to another computer: hello libwx_gtk2_core-2.8.so libwx_base-2.8.so libwx_gtk2_core-2.8.so.0 libwx_base-2.8.so.0 libwx_gtk2_core-2.8.so.0.6.0 libwx_base-2.8.so.0.6.0 libwx_gtk2_html-2.8.so libwx_base_net-2.8.so libwx_gtk2_html-2.8.so.0 libwx_base_net-2.8.so.0 libwx_gtk2_html-2.8.so.0.6.0 libwx_base_net-2.8.so.0.6.0 libwx_gtk2_qa-2.8.so libwx_base_xml-2.8.so libwx_gtk2_qa-2.8.so.0 libwx_base_xml-2.8.so.0 libwx_gtk2_qa-2.8.so.0.6.0 libwx_base_xml-2.8.so.0.6.0 libwx_gtk2_richtext-2.8.so libwx_gtk2_adv-2.8.so libwx_gtk2_richtext-2.8.so.0 libwx_gtk2_adv-2.8.so.0 libwx_gtk2_richtext-2.8.so.0.6.0 libwx_gtk2_adv-2.8.so.0.6.0 libwx_gtk2_xrc-2.8.so libwx_gtk2_aui-2.8.so libwx_gtk2_xrc-2.8.so.0 libwx_gtk2_aui-2.8.so.0 libwx_gtk2_xrc-2.8.so.0.6.0 libwx_gtk2_aui-2.8.so.0.6.0 And run it: LD_LIBRARY_PATH=. ./hello Result: Fatal Error: Mismatch between the program and library build versions detected. The library used 2.8 (debug,ANSI,compiler with C++ ABI 1002,wx containers,compatible with 2.6), and your program used 2.8 (no debug,ANSI,compiler with C++ ABI 1002,wx containers,compatible with 2.6). ./run.sh: line 1: 1810 Aborted LD_LIBRARY_PATH=. ./hello What is wrong?

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  • How do I use sqlite3 PRAGMA user_version in Objective-c?

    - by mobibob
    I am trying to check the user_version of the sqlite DB. I have an admin tool to bump the version, but I don't understand the syntax of the pragma statement. I am expecting to test the value in an if-statement. Can someone provide a code sample? When I embed the pragma statement in my objective-c code, the compiler throws an error.

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  • Generating moderately interesting images

    - by Williham Totland
    Abstract: Can you propose a mathematical-ish algorithm over a plane of pixels that will generate a moderately interesting image, preferably one that on the whole resembles something? The story thus far: Once upon a time I decided in an effort to reduce cycle waste on my (admittedly too) numerous computers, and set out to generate images in a moderately interesting fashion; using a PRNG and some clever math to create images that would, on the whole, resemble something. Or at least, that was the plan. As it turns out, clever math requires being a clever mathematician; this I am not. At some length I arrived at a method that preferred straight lines (as these are generally the components of which our world is made), perhaps too strongly. The result is mildly interesting; resembling, perhaps, city grids as such: Now for the question proper: Given the source code of this little program; can you improve upon it and propose a method that gives somewhat more interesting results? (e.g. not city grids, but perhaps faces, animals, geography, what have you) This is also meant as a sort of challenge; I suppose and as such I've set down some completely arbitrary and equally optional rules: The comments in the code says it all really. Suggestions and "solutions" should edit the algorithm itself, not the surrounding framework, except as for to fix errors that prevents the sample from compiling. The code should compile cleanly with a standard issue C compiler. (If the example provided doesn't, oops! Tell me, and I'll fix. :) The method should, though again, this is optional, not need to elicit help from your friendly neighborhood math library. Solutions should probably be deliverable by simply yanking out whatever is between the snip lines (the ones that say you should not edit above and below, respectively), with a statement to the effect of what you need to add to the preamble in particular. The code requires a C compiler and libpng to build; I'm not entirely confident that the MinGW compiler provides the necessities, but I would be surprised if it didn't. For Debian you'll want the libpng-dev package, and for Mac OS X you'll want the XCode tools.. The source code can be downloaded here. Warning: Massive code splurge incoming! // compile with gcc -o imggen -lpng imggen.c // optionally with -DITERATIONS=x, where x is an appropriate integer // If you're on a Mac or using MinGW, you may have to fiddle with the linker flags to find the library and includes. #include <stdio.h> #include <stdlib.h> #include <png.h> #ifdef ITERATIONS #define REPEAT #endif // ITERATIONS // YOU MAY CHANGE THE FOLLOWING DEFINES #define WIDTH 320 #define HEIGHT 240 // YOU MAY REPLACE THE FOLLOWING DEFINES AS APPROPRIATE #define INK 16384 void writePNG (png_bytepp imageBuffer, png_uint_32 width, png_uint_32 height, int iteration) { char *fname; asprintf(&fname, "out.%d.png", iteration); FILE *fp = fopen(fname, "wb"); if (!fp) return; png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); png_infop info_ptr = png_create_info_struct(png_ptr); png_init_io(png_ptr, fp); png_set_filter(png_ptr, PNG_FILTER_TYPE_DEFAULT, PNG_FILTER_NONE); png_set_compression_level(png_ptr, Z_BEST_COMPRESSION); png_set_IHDR(png_ptr, info_ptr, width, height, 8, PNG_COLOR_TYPE_GRAY, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); png_set_rows(png_ptr, info_ptr, imageBuffer); png_set_invert_mono(png_ptr); /// YOU MAY COMMENT OUT THIS LINE png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL); png_destroy_write_struct(&png_ptr, &info_ptr); fclose(fp); free(fname); } int main (int argc, const char * argv[]) { png_uint_32 height = HEIGHT, width = WIDTH; int iteration = 1; #ifdef REPEAT for (iteration = 1; iteration <= ITERATIONS; iteration++) { #endif // REPEAT png_bytepp imageBuffer = malloc(sizeof(png_bytep) * height); for (png_uint_32 i = 0; i < height; i++) { imageBuffer[i] = malloc(sizeof(png_byte) * width); for (png_uint_32 j = 0; j < width; j++) { imageBuffer[i][j] = 0; } } /// CUT ACROSS THE DASHED LINES /// ------------------------------------------- /// NO EDITING ABOVE THIS LINE; EXCEPT AS NOTED int ink = INK; int x = rand() % width, y = rand() % height; int xdir = (rand() % 2)?1:-1; int ydir = (rand() % 2)?1:-1; while (ink) { imageBuffer[y][x] = 255; --ink; xdir += (rand() % 2)?(1):(-1); ydir += (rand() % 2)?(1):(-1); if (ydir > 0) { ++y; } else if (ydir < 0) { --y; } if (xdir > 0) { ++x; } else if (xdir < 0) { --x; } if (x == -1 || y == -1 || x == width || y == height || x == y && x == 0) { x = rand() % width; y = rand() % height; xdir = (rand() % 2)?1:-1; ydir = (rand() % 2)?1:-1; } } /// NO EDITING BELOW THIS LINE /// ------------------------------------------- writePNG(imageBuffer, width, height, iteration); for (png_uint_32 i = 0; i < height; i++) { free(imageBuffer[i]); } free(imageBuffer); #ifdef REPEAT } #endif // REPEAT return 0; } Note: While this question doesn't strictly speaking seem "answerable" as such; I still believe that it can give rise to some manner of "right" answer. Maybe. Happy hunting.

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  • Project compilation requires a class that is not used anywhere

    - by Susei
    When I build with ant my project that uses libgdx, I get a strange error. It says that a class com.google.gwt.dom.client.ImageElement is not found, but it isn't used at all in the code. How can I find what makes this class necessary? Even searching over the whole project doesn't give any results. It says that error is at PixmapTextureAtlas.java:16 (class source), but there is no code that uses that ImageElement class. Adding the library containing com.google.gwt.dom.client.ImageElement class helps, of course, but I'd like to figure out why this class in needed. Here is the place in ant log that tells of the actual error: Compiling 3 source files to /home/suseika/Projects/tendiwa/client/bin /home/suseika/Projects/tendiwa/client/src/org/tendiwa/client/PixmapTextureAtlas.java:16: error: cannot access ImageElement class file for com.google.gwt.dom.client.ImageElement not found Here is the whole ant log: /usr/lib/jvm/java-7-oracle/bin/java -Xmx128m -Xss2m -Dant.home=/opt/intellijidea/lib/ant -Dant.library.dir=/opt/intellijidea/lib/ant/lib -Dfile.encoding=UTF-8 -classpath /opt/intellijidea/lib/ant/lib/ant-apache-regexp.jar:/opt/intellijidea/lib/ant/lib/ant-swing.jar:/opt/intellijidea/lib/ant/lib/ant-apache-xalan2.jar:/opt/intellijidea/lib/ant/lib/ant-jdepend.jar:/opt/intellijidea/lib/ant/lib/ant-apache-resolver.jar:/opt/intellijidea/lib/ant/lib/ant-jsch.jar:/opt/intellijidea/lib/ant/lib/ant.jar:/opt/intellijidea/lib/ant/lib/ant-testutil.jar:/opt/intellijidea/lib/ant/lib/ant-launcher.jar:/opt/intellijidea/lib/ant/lib/ant-apache-bsf.jar:/opt/intellijidea/lib/ant/lib/ant-commons-logging.jar:/opt/intellijidea/lib/ant/lib/ant-netrexx.jar:/opt/intellijidea/lib/ant/lib/ant-junit.jar:/opt/intellijidea/lib/ant/lib/ant-commons-net.jar:/opt/intellijidea/lib/ant/lib/ant-apache-bcel.jar:/opt/intellijidea/lib/ant/lib/ant-antlr.jar:/opt/intellijidea/lib/ant/lib/ant-apache-log4j.jar:/opt/intellijidea/lib/ant/lib/ant-jai.jar:/opt/intellijidea/lib/ant/lib/ant-apache-oro.jar:/opt/intellijidea/lib/ant/lib/ant-jmf.jar:/opt/intellijidea/lib/ant/lib/ant-javamail.jar:/usr/lib/jvm/java-7-oracle/lib/tools.jar:/opt/intellijidea/lib/idea_rt.jar com.intellij.rt.ant.execution.AntMain2 -logger com.intellij.rt.ant.execution.IdeaAntLogger2 -inputhandler com.intellij.rt.ant.execution.IdeaInputHandler -buildfile /home/suseika/Projects/tendiwa/client/build.xml jar build.xml property path description compile ant property property property description compile mkdir javac jar ant property description _core_src_available available ontology antcall property description _core_src_available available _build_core ant property property compile echo /home/suseika/Projects/tendiwa/client mkdir javac jar jar Building jar: /home/suseika/Projects/tendiwa/MainModule.jar description tempfile mkdir Created dir: /tmp/tendiwa373148820 unjar Expanding: /home/suseika/Projects/tendiwa/MainModule.jar into /tmp/tendiwa373148820 Expanding: /home/suseika/Projects/tendiwa/tendiwa-backend.jar into /tmp/tendiwa373148820 Expanding: /home/suseika/Projects/tendiwa/tendiwa-ontology.jar into /tmp/tendiwa373148820 copy Copying 1 file to /tmp/tendiwa373148820 java Created item short_sword Created item short_bow Created item bucket Created item boot Created item steel_morningstar Created item rifle_ammo Created item handAxe Created item iron_armor Created item steel_mace Created item jacket Created item fedora Created item wooden_arrow Saving sources to /tmp/tendiwa373148820/ontology/src tendiwa/resources/SoundTypes.java tendiwa/resources/CharacterTypes.java tendiwa/resources/ObjectTypes.java tendiwa/resources/FloorTypes.java tendiwa/resources/ItemTypes.java tendiwa/resources/MaterialTypes.java mkdir mkdir mkdir Created dir: /tmp/tendiwa373148820/ontology/bin javac jar Building jar: /home/suseika/Projects/tendiwa/tendiwa-ontology.jar echo Resources source code generated ant property property compile echo /home/suseika/Projects/tendiwa/client mkdir javac jar jar jar Building jar: /home/suseika/Projects/tendiwa/MainModule.jar mkdir javac /home/suseika/Projects/tendiwa/client/build.xml:25: Compile failed; see the compiler error output for details. at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1150) at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:912) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:390) at org.apache.tools.ant.Target.performTasks(Target.java:411) at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399) at org.apache.tools.ant.Project.executeTarget(Project.java:1368) at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) at org.apache.tools.ant.Project.executeTargets(Project.java:1251) at org.apache.tools.ant.Main.runBuild(Main.java:809) at org.apache.tools.ant.Main.startAnt(Main.java:217) at org.apache.tools.ant.Main.start(Main.java:180) at org.apache.tools.ant.Main.main(Main.java:268) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.intellij.rt.ant.execution.AntMain2.main(AntMain2.java:30) /home/suseika/Projects/tendiwa/client/build.xml (25:46)'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds Compiling 3 source files to /home/suseika/Projects/tendiwa/client/bin /home/suseika/Projects/tendiwa/client/src/org/tendiwa/client/PixmapTextureAtlas.java:16: error: cannot access ImageElement class file for com.google.gwt.dom.client.ImageElement not found 1 error /home/suseika/Projects/tendiwa/client/build.xml:25: Compile failed; see the compiler error output for details. at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1150) at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:912) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:390) at org.apache.tools.ant.Target.performTasks(Target.java:411) at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399) at org.apache.tools.ant.Project.executeTarget(Project.java:1368) at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) at org.apache.tools.ant.Project.executeTargets(Project.java:1251) at org.apache.tools.ant.Main.runBuild(Main.java:809) at org.apache.tools.ant.Main.startAnt(Main.java:217) at org.apache.tools.ant.Main.start(Main.java:180) at org.apache.tools.ant.Main.main(Main.java:268) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.intellij.rt.ant.execution.AntMain2.main(AntMain2.java:30) /home/suseika/Projects/tendiwa/client/build.xml:25: Compile failed; see the compiler error output for details. at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1150) at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:912) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) at org.apache.tools.ant.Task.perform(Task.java:348) at org.apache.tools.ant.Target.execute(Target.java:390) at org.apache.tools.ant.Target.performTasks(Target.java:411) at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399) at org.apache.tools.ant.Project.executeTarget(Project.java:1368) at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) at org.apache.tools.ant.Project.executeTargets(Project.java:1251) at org.apache.tools.ant.Main.runBuild(Main.java:809) at org.apache.tools.ant.Main.startAnt(Main.java:217) at org.apache.tools.ant.Main.start(Main.java:180) at org.apache.tools.ant.Main.main(Main.java:268) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.intellij.rt.ant.execution.AntMain2.main(AntMain2.java:30) Ant build completed with 3 errors one warning in 4s at 10/30/13 3:09 AM Here is a part of ant file where this error appears: <path id="tendiwa.jars"> <fileset dir="../libs"> <include name="**/*.jar"/> </fileset> <pathelement path="../tendiwa-backend.jar"/> <pathelement path="../tendiwa-ontology.jar"/> <!--<fileset dir="/usr/share/java" includes="gwt*.jar"/>--> </path> <target name="compile"> <ant dir="../MainModule" target="jar"/> <mkdir dir="bin"/> <javac destdir="bin" failonerror="true"> <classpath> <path refid="tendiwa.jars"/> <!--temporary--> <pathelement path="../tendiwa-ontology.jar"/> <!--temporary--> <pathelement path="../MainModule.jar"/> <fileset dir="../libs" includes="**/*.jar"/> </classpath> <src> <pathelement path="Desktop/src"/> <pathelement path="src"/> </src> </javac> </target>

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  • Compile Liferay under os x 10.6

    - by wezzy
    Hi i'm trying to build Liferay from source, i've downloaded liferay-portal-src-5.2.3.zip but when i go in and press "ant start" i got 3 errors: SampleSQLBuilder.java:139: cannot find symbol _counter = new SimpleCounter(counterOffset); EditServerAction.java:401: cannot find symbol Log4JUtil.setLevel(loggerName, priority); EditUserPortraitAction.java:102: cannot find symbol PortletRequestUtil.testMultipartWithCommonsFileUpload I've tried switching compiler using build.properties but nothing seems to work. Can you help me ?

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  • What predefined macro can I use to detect clang ?

    - by Pierre Bourdon
    I'm trying to detect the compiler used to compile my source code. I can easily find predefined macros to check for MSVC or GCC (see http://predef.sourceforge.net/ for example), but I cannot find any macro to check for clang. Does someone know if clang defines a macro like __CLANG__ in order to know what is currently compiling my code ?

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  • GHCi error: Not in scope

    - by dmindreader
    I'm trying to compile this function from Learn You a Haskell for Great Good. removeNonUppercase st = [ c | c <- st, c `elem` ['A'..'Z']] by placing it into a removeNonUpperCase.hs file. It compiles fine, but when passing the argument: ghci> removeNonUppercase "Hahaha! Ahahaha!" the compiler says: <interactive>:1:0: Not in scope: 'removeNonUpperCase' Why?

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  • Always use multiple cores (/MP) flag with Visual Studio?

    - by dwj
    I'm using Visual Studio 2008 on my main build system. I've been playing with Visual Studio 2010 on another one. It appears that the tool still only wants to use one core when compiling unless you specify the /MP switch in the compiler switches (see http://stackoverflow.com/questions/1422601/how-do-i-turn-on-multi-cpu-core-c-compiles-in-the-visual-studio-ide-2008). I have to do this for every project. Is there a way to make VS always do this?

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  • Decompress PNG using zlib

    - by darkie15
    Hi All, How can I use zlib library to decompress a PNG file? I have no idea how to read a PNG file. When I opened a PNG file in TextPad(a text editor), the data was not at all understandable. Is it because a PNG file is compressed? Any help is greatly appreciated. I need to read a PNG file using a C program and gcc compiler. Regards, darkie

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  • embedding pascal

    - by Sam P
    Is anyone aware of a Pascal interpreter/compiler which is embeddable in C++ (or anything else other than Pascal) applications? I am cloning (for lack of a better word) an application which uses an Object-Pascal compatible scripting language and needs to be script compatible. Am I going to end up writing an interpreter? (!)

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  • Save gcc compile status to a text file for Java

    - by JohnBore
    I'm making a C Assessment Program through Java, which has a bunch of programming questions for C, and it lets the user input an answer in the form of C code, and then press a "Compile" button, which is linked to a bat file that runs the user input code through gcc. I've got the input and compiling working, but I need to get the output from the compiler and get that to print textarea within the program. I can get a simple "Hello, world" compiling, but I'm having trouble getting programs that require a user input with scanf, for example, to be printed. else if(e.getSource().equals(compile)){ if(questionNumber<1){ JOptionPane.showMessageDialog(programFrame, "Please start the assessment", "Compile Error", JOptionPane.ERROR_MESSAGE); } else{ FileOutputStream fileWrite; try { fileWrite = new FileOutputStream("demo/demo.c"); new PrintStream(fileWrite).println(input.getText());//saves what the user has entered in to a C source file fileWrite.close(); @SuppressWarnings("unused") Process process = Runtime.getRuntime().exec("cmd /c compile.bat");//runs the batch file to compile the source file compileCode(); try{ fileStream = new FileInputStream("demo/output.txt"); inputStream = new DataInputStream(fileStream); bufferRead = new BufferedReader(new InputStreamReader(inputStream)); while((stringLine = bufferRead.readLine())!=null){ compiled.append(stringLine); compiled.append("\n"); } inputStream.close(); } catch(IOException exc){ System.err.println("Unable to read file"); System.exit(-1); } } catch (IOException exc) { JOptionPane.showMessageDialog(programFrame, "Demo file not found", "File Error", JOptionPane.ERROR_MESSAGE); } } This is the actionPerformed method for the "Compile" button, the compileCode() is the JFrame that displays the output and "compiled" is the textArea for the output. My batch file is: C: cd dev-cpp\bin gcc.exe H:\workspace\QuestionProgram\demo\demo.c -o demo > H:\workspace\QuestionProgram\demo\compilestatus.txt demo > H:\workspace\QuestionProgram\demo\output.txt I'm not sure how I can do it, so the frame is created for the output of the code if the code requires a user input as the command prompt doesn't open without adding "START" to .exec(), but then the frame appears before the program has finished running. Also, how would I get the output of the compiler if the compile fails because of an error? The way I've got it in my batch file at the moment doesn't put anything in a text file if it fails.

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  • writing a custom anaylzer in pylucene/inheritance using jcc?

    - by yaniv
    Hello, I want to write a custom analyzer in pylucene. Usually in java lucene , when you write a analyzer class , your class inherits lucene's Analyzer class. but pylucene uses jcc , the java to c++/python compiler. So how do you let a python class inherit from a java class using jcc ,and especially how do you write a custom pylucene analyzer? Thanks.

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  • C++11 support in GNU automake

    - by sorush-r
    I'm trying to port buildsystem of my project to GNU autotools. The code need to be compiled with -std=c++11 or -std=c++0x flag. I want my configure script to check if compiler supports C++11 or not. I tried adding AX_CHECK_COMPILE_FLAG([-std=c++0x], [CXXFLAGS="$CXXFLAGS -std=c++0x"]) to configure.ac file but configure fails with this error: ... ./configure: line 2732: syntax error near unexpected token `-std=c++0x,' ./configure: line 2732: `AX_CHECK_COMPILE_FLAG(-std=c++0x, CXXFLAGS="$CXXFLAGS -std=c++0x")'

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  • Using FFmpeg in .net?

    - by daniel
    So i know its a fairly big challenge but i want to write a basic movie player/converter in c# using the FFmpeg library. However the first obstacle i need to overcome is wrapping the FFmpeg library in c#. I downloaded ffmpeg but couldn't compile it on windows, so i downloaded a precompiled version for me. Ok awesome. Then i started looking for c# wrappers. I have looked around and have found a few wrappers such as SharpFFmpeg (http://sourceforge.net/projects/sharpffmpeg/) and ffmpeg-sharp (http://code.google.com/p/ffmpeg-sharp/). First of all i wanted to use ffmpeg-sharp as its LGPL and SharpFFmpeg is GPL. However it had quite a few compile errors. Turns out it was written for the mono compiler, i tried compiling it with mon but couldn't figure out how. I then started to manually fix the compiler errors myself, but came across a few scary ones and thought i'd better leave those alone. So i gave up on ffmpeg-sharp. Then i looked at SharpFFmpeg and it looks like what i want, all the functions P/Invoked for me. However its GPL? Both the AVCodec.cs and AVFormat.cs files look like ports of avcodec.c and avformat.c which i reckon i could port myself? Then not have to worry about licencing. But i wan't to get this right before i go ahead and start coding. Should I: Write my own c++ library for interacting with ffmpeg, then have my c# program talk to the c++ library in order to play/convert videos etc. OR Port avcodec.h and avformat.h (is that all i need?) to c# by using a whole lot of DllImports and write it entirely in c#? First of all consider that i'm not great at c++ as i rarely use it but i know enough to get around. The reason i'm thinking #1 might be the better option is that most FFmpeg tutorials are in c++ and i'd also have more control over memory management than if i was to do it in c#. What do you think? Also would you happen to have any usefull links (perhaps a tutorial) for using FFmpeg? EDIT: spelling mistakes

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  • Visual Studio 2005 and Windows SDK 6.1 (Server 2008)

    - by bde
    I am trying to figure out how Visual Studio 2005 and the Windows SDK 6.1 integrate in a command line build environment (if at all). I am mostly interested in x64 development, but also just in how these two packages fit together. Is it possible/advisable to use the compiler and linker from Visual Studio 2005 and the headers/libraries from the newer Windows SDK 6.1? Also, is it possible to use the devenv command (part of VS2005) in the Windows SDK 6.1 build environment?

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  • Passing array by ref.

    - by atch
    Ref. to my last post and sellibitze's comment to that post on passing array by ref rather than by value, why is it that when I'm passing array by value compiler can deduce arguments but it won't do it if I pass it by value? @Paul So just to make it clear when I'm declaring fnc: void f(int a[]);//I'm passing a pointer but when I'm declaring: void f(int &a[]);//I'm passing a ref? Do I understand this correctly now?

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  • ant compile problem

    - by senzacionale
    If I start ant compile in JDeveloper all classes are compiled successfully and copied to the classes folder. But if I run ant compile from console then no classes are copied to the classes folder. Does anyone know why? Maybe the problem is with: build.compiler=oracle.ojc.ant.taskdefs.OjcAdapter? build.properties: javac.debug=on oracle.home=C:/Oracle/jdevstudio10133 build.compiler=oracle.ojc.ant.taskdefs.OjcAdapter output.dir=classes javac.deprecation=on javac.nowarn=off package.name=KIS dest.dir=C:/Projekti/Projekt ANT/CVS src.dir=src view.dir=View model.dir=Model modelirc2000.dir=ModelIRC2000 build.xml for compile <target name="compile" description="Compile Java source files" depends="init"> <javac destdir="${dest.dir}/${package.name}/${model.dir}/${output.dir}" classpathref="classpath" debug="${javac.debug}" nowarn="${javac.nowarn}" deprecation="${javac.deprecation}" encoding="Cp1250" source="1.5" target="1.5"> <src path="${dest.dir}/${package.name}/${model.dir}/${src.dir}"/> <exclude name="irc/kis/model/dm/entity/common/ZnanjeImplMsgBundle.java/"/> <exclude name="META-INF/"/> <exclude name="irc/kis/view/"/> <exclude name="irc/kis/model/zap/view/vp/"/> </javac> </target> <target name="copy" description="Copy files to output directory" depends="init"> <patternset id="copy.patterns"> <include name="**/*.gif"/> <include name="**/*.jpg"/> <include name="**/*.jpeg"/> <include name="**/*.png"/> <include name="**/*.properties"/> <include name="**/*.xml"/> <include name="**/*-apf.xml"/> <include name="**/*.ejx"/> <include name="**/*.xcfg"/> <include name="**/*.cpx"/> <include name="**/*.dcx"/> <include name="**/*.wsdl"/> <include name="**/*.ini"/> <include name="**/*.tld"/> <include name="**/*.tag"/> <include name="**/*.jpx"/> </patternset> <copy todir="${dest.dir}/${package.name}/${model.dir}/${output.dir}"> <fileset dir="${dest.dir}/${package.name}/${model.dir}/${src.dir}"> <patternset refid="copy.patterns"/> </fileset> </copy> </target>

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  • XCode GCC-4.0 vs 4.2

    - by John Smith
    I have just changed a compiler option from 4.0 to 4.2. Now I get an error: jump to case label crosses initialization of 'const char* selectorName' It works fine in 4.0 Any ideas?

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