Search Results

Search found 21828 results on 874 pages for 'program x'.

Page 124/874 | < Previous Page | 120 121 122 123 124 125 126 127 128 129 130 131  | Next Page >

  • WIndows 7: would like recursively check a directory for changes to files and folders since my last visit

    - by user1026169
    I have found varieties of this question. Most of them fall under monitoring and others are said to be buggy. A continuously monitoring program won't help me and neither will a list of the most recently modified files. I would like to check if the directory, its sub folders and files have changed since my last visit. It seems to me that I'd likely need a program that maintains and index of that directory and compares it with its condition when I tell it to. Then that program could output to a log for my use. This is on Windows 7 over a shared network, the folder(s) I'd like to check have 4-50GB of data. I did find this, however I am still learning how to program. I think it describes what I want: http://www.rgagnon.com/javadetails/java-0490.html Thanks for considering.

    Read the article

  • What is the Windows analog of the Linux watch command?

    - by PeterJCLaw
    I'm looking for a Windows program/script/command line function that works like Linux's watch program. watch periodically calls another program/whatever and shows the result, which is great for refreshing an output file or similar every second: watch cat my-output.txt or, more powerfully: watch grep "fail" my-output.txt I've looked for it in cygwin's library, but it doesn't seem to be present.

    Read the article

  • Tomcat v7.0 failed to start on Eclipse

    - by Questions
    Whenever I am running a program on Eclipse, my tomcat is failing to start. I get a dialog box stating this message Server Tomcat v7.0 Server at localhost failed to start. In the console, I am getting this messages Nov 17, 2011 11:56:04 AM org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre6\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Program Files/Java/jre6/bin/client;C:/Program Files/Java/jre6/bin;C:/Program Files/Java/jre6/lib/i386;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Java\jdk1.6.0_01\bin;C:\Program Files\Java\jre1.6.0_01\bin;C:\ILOG\CPLEX_Studio_Preview122\opl\bin\x86_win32;C:\ILOG\CPLEX_Studio_Preview122\opl\oplide\;C:\ILOG\CPLEX_Studio_Preview122\cplex\bin\x86_win32;C:\ILOG\CPLEX_Studio_Preview122\cpoptimizer\bin\x86_win32;;D:\JSP_Setup\eclipse-jee-helios-SR2-win32\eclipse;;. Nov 17, 2011 11:56:04 AM org.apache.tomcat.util.digester.SetPropertiesRule begin WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:servletConfigTest' did not find a matching property. Nov 17, 2011 11:56:04 AM org.apache.tomcat.util.digester.SetPropertiesRule begin WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:BeerAdvice3' did not find a matching property. Nov 17, 2011 11:56:04 AM org.apache.tomcat.util.digester.SetPropertiesRule begin WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:BeerAdvice1' did not find a matching property. Nov 17, 2011 11:56:05 AM org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on http-8080 Nov 17, 2011 11:56:05 AM org.apache.coyote.ajp.AjpProtocol init INFO: Initializing Coyote AJP/1.3 on ajp-8009 Nov 17, 2011 11:56:05 AM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 682 ms Nov 17, 2011 11:56:05 AM org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina Nov 17, 2011 11:56:05 AM org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/7.0.2 java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:415) Caused by: java.lang.IllegalArgumentException: Invalid <url-pattern> entry_checking in servlet mapping at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:2823) at org.apache.catalina.core.StandardContext.addServletMapping(StandardContext.java:2799) at org.apache.catalina.deploy.WebXml.configureContext(WebXml.java:1278) at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1255) at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878) at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:313) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:89) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4667) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:988) at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:771) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139) at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:988) at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:275) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139) at org.apache.catalina.core.StandardService.startInternal(StandardService.java:427) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139) at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:649) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:139) at org.apache.catalina.startup.Catalina.start(Catalina.java:585) ... 6 more I had run the code previously, but now it is giving this problems. Also, I went through this post http://forums.opensuse.org/applications/391114-tomcat6-eclipse-not-working.html But is not helping me. Please help at the earliest.

    Read the article

  • tkinter frame does not show on startup

    - by Jzz
    this is my first question on SO, so correct me please if I make a fool of myself. I have this fairly complicated python / Tkinter application (python 2.7). On startup, the __init__ loads several frames, and loads a database. When that is finished, I want to set the application to a default state (there are 2 program states, 'calculate' and 'config'). Setting the state of the application means that the appropriate frame is displayed (using grid). When the program is running, the user can select a program state in the menu. Problem is, the frame is not displayed on startup. I get an empty application (menu bar and status bar are displayed). When I select a program state in the menu, the frame displays as it should. Question: What am I doing wrong? Should I update idletasks? I tried, but no result. Anything else? Background: I use the following to switch program states: def set_program_state(self, state): '''sets the program state''' #try cleaning all the frames: try: self.config_frame.grid_forget() except: pass try: self.tidal_calculations_frame.grid_forget() except: pass try: self.tidal_grapth_frame.grid_forget() except: pass if state == "calculate": print "Switching to calculation mode" self.tidal_calculations_frame.grid() #frame is preloaded self.tidal_calculations_frame.fill_data(routes=self.routing_data.routes, deviations=self.misc_data.deviations, ship_types=self.misc_data.ship_types) self.tidal_grapth_frame.grid() self.program_state = "calculate" elif state == "config": print "Switching to config mode" self.config_frame = GUI_helper.config_screen_frame(self, self.user) #load frame first (contents depend on type of user) self.config_frame.grid() self.program_state = "config" I understand that this is kind of messy to read, so I simplified things for testing, using this: def set_program_state(self, state): '''sets the program state''' #try cleaning all the frames: try: self.testlabel_1.grid_forget() except: pass try: self.testlabel_2.grid_forget() except: pass if state == "calculate": print "switching to test1" self.testlabel_1 = tk.Label(self, text="calculate", borderwidth=1, relief=tk.RAISED) self.testlabel_1.grid(row=0, sticky=tk.W+tk.E) elif state == "config": print "switching to test1" self.testlabel_2 = tk.Label(self, text="config", borderwidth=1, relief=tk.RAISED) self.testlabel_2.grid(row=0, sticky=tk.W+tk.E) But the result is the same. The frame (or label in this test) is not displayed at startup, but when the user selects the state (calling the same function) the frame is displayed. UPDATE the sample code in the comments (thanks for that!) pointed me in another direction. Further testing revealed (what I think) the cause of the problem. Disabling the display of the status bar made the program work as expected. Turns out, I used pack to display the statusbar and grid to display the frames. And they are in the same container, so problems arise. I fixed that by using only pack inside the main container. But the same problem is still there. This is what I use for the statusbar: self.status = GUI_helper.StatusBar(self.parent) self.status.pack(side=tk.BOTTOM, fill=tk.X) And if I comment out the last line (pack), the config frame loads on startup, as per this line: self.set_program_state("config") But if I let the status bar pack inside the main window, the config frame does not show. Where it does show when the user asks for it (with the same command as above).

    Read the article

  • std::basic_stringstream<unsigned char> won't compile with MSVC 10

    - by Michael J
    I'm trying to get UTF-8 chars to co-exist with ANSI 8-bit chars. My strategy has been to represent utf-8 chars as unsigned char so that appropriate overloads of functions can be used for the two character types. e.g. namespace MyStuff { typedef uchar utf8_t; typedef std::basic_string<utf8_t> U8string; } void SomeFunc(std::string &s); void SomeFunc(std::wstring &s); void SomeFunc(MyStuff::U8string &s); This all works pretty well until I try to use a stringstream. std::basic_ostringstream<MyStuff::utf8_t> ostr; ostr << 1; MSVC Visual C++ Express V10 won't compile this: c:\program files\microsoft visual studio 10.0\vc\include\xlocmon(213): warning C4273: 'id' : inconsistent dll linkage c:\program files\microsoft visual studio 10.0\vc\include\xlocnum(65) : see previous definition of 'public: static std::locale::id std::numpunct<unsigned char>::id' c:\program files\microsoft visual studio 10.0\vc\include\xlocnum(65) : while compiling class template static data member 'std::locale::id std::numpunct<_Elem>::id' with [ _Elem=Tk::utf8_t ] c:\program files\microsoft visual studio 10.0\vc\include\xlocnum(1149) : see reference to function template instantiation 'const _Facet &std::use_facet<std::numpunct<_Elem>>(const std::locale &)' being compiled with [ _Facet=std::numpunct<Tk::utf8_t>, _Elem=Tk::utf8_t ] c:\program files\microsoft visual studio 10.0\vc\include\xlocnum(1143) : while compiling class template member function 'std::ostreambuf_iterator<_Elem,_Traits> std::num_put<_Elem,_OutIt>:: do_put(_OutIt,std::ios_base &,_Elem,std::_Bool) const' with [ _Elem=Tk::utf8_t, _Traits=std::char_traits<Tk::utf8_t>, _OutIt=std::ostreambuf_iterator<Tk::utf8_t,std::char_traits<Tk::utf8_t>> ] c:\program files\microsoft visual studio 10.0\vc\include\ostream(295) : see reference to class template instantiation 'std::num_put<_Elem,_OutIt>' being compiled with [ _Elem=Tk::utf8_t, _OutIt=std::ostreambuf_iterator<Tk::utf8_t,std::char_traits<Tk::utf8_t>> ] c:\program files\microsoft visual studio 10.0\vc\include\ostream(281) : while compiling class template member function 'std::basic_ostream<_Elem,_Traits> & std::basic_ostream<_Elem,_Traits>::operator <<(int)' with [ _Elem=Tk::utf8_t, _Traits=std::char_traits<Tk::utf8_t> ] c:\program files\microsoft visual studio 10.0\vc\include\sstream(526) : see reference to class template instantiation 'std::basic_ostream<_Elem,_Traits>' being compiled with [ _Elem=Tk::utf8_t, _Traits=std::char_traits<Tk::utf8_t> ] c:\users\michael\dvl\tmp\console\console.cpp(23) : see reference to class template instantiation 'std::basic_ostringstream<_Elem,_Traits,_Alloc>' being compiled with [ _Elem=Tk::utf8_t, _Traits=std::char_traits<Tk::utf8_t>, _Alloc=std::allocator<uchar> ] . c:\program files\microsoft visual studio 10.0\vc\include\xlocmon(213): error C2491: 'std::numpunct<_Elem>::id' : definition of dllimport static data member not allowed with [ _Elem=Tk::utf8_t ] Any ideas? ** Edited 19 June 2012 ** OK, I've gotten closer to understanding this, but not how to solve it. As we all know, static class variables get defined twice: once in the class definition and once outside the class definition which establishes storage space. e.g. // in .h file class CFoo { // ... static int x; }; // in .cpp file int CFoo::x = 42; Now in the VC10 headers we get something like this: template<class _Elem> class numpunct : public locale::facet { // ... _CRTIMP2_PURE static locale::id id; // ... } When the header is included in an application, _CRTIMP2_PURE is defined as __declspec(dllimport), which means that the variable is imported from a dll. Now the header also contains the following template<class _Elem> locale::id numpunct<_Elem>::id; Note the absence of the __declspec(dllimport) qualifier. i.e. The class declaration says that the static linkage of the id variable is in the dll, but for the general case, it gets declared outside the dll. For the known cases, there are specialisations. template locale::id numpunct<char>::id; template locale::id numpunct<wchar_t>::id; These are protected by #ifs so that they are only included when building the DLL. They are excluded otherwise. i.e. the char and wchar_t versions of numpunct ARE inside the dll So we have the class definition saying that id's storage is in the DLL, but that is only true for the char and wchar_t specialisations, meaning that my unsigned char version is doomed. :-( The only way forward that I can think of is to create my own specialisation: basically copying it from the header file and fixing it. This raises many issues. Anybody have a better idea?

    Read the article

  • Fragment shaders on a texture

    - by Snowangelic
    Hello stack overflow. I am trying to add some post-processing capabilities to a program. The rendering is done using openGL. I just want to allow the program to load some home made fragment shader and use them on the video stream. I wrote a little piece of shader using "OpenGL Shader Builder" that just turns a texture in grayscale. The shaders works well in the shader builder but I can't make it work in the main program. The screens stays all black. Here is the setup : @implementation PluginGLView - (id) initWithCoder: (NSCoder *) coder { const GLubyte * strExt; if ((self = [super initWithCoder:coder]) == nil) return nil; glLock = [[NSLock alloc] init]; if (nil == glLock) { [self release]; return nil; } // Init pixel format attribs NSOpenGLPixelFormatAttribute attrs[] = { NSOpenGLPFAAccelerated, NSOpenGLPFANoRecovery, NSOpenGLPFADoubleBuffer, 0 }; // Get pixel format from OpenGL NSOpenGLPixelFormat* pixFmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs]; if (!pixFmt) { NSLog(@"No Accelerated OpenGL pixel format found\n"); NSOpenGLPixelFormatAttribute attrs2[] = { NSOpenGLPFANoRecovery, 0 }; // Get pixel format from OpenGL pixFmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs2]; if (!pixFmt) { NSLog(@"No OpenGL pixel format found!\n"); [self release]; return nil; } } [self setPixelFormat:[pixFmt autorelease]]; /* long swapInterval = 1 ; [[self openGLContext] setValues:&swapInterval forParameter:NSOpenGLCPSwapInterval]; */ [glLock lock]; [[self openGLContext] makeCurrentContext]; // Init object members strExt = glGetString (GL_EXTENSIONS); texture_range = gluCheckExtension ((const unsigned char *)"GL_APPLE_texture_range", strExt) ? GL_TRUE : GL_FALSE; texture_hint = GL_STORAGE_SHARED_APPLE ; client_storage = gluCheckExtension ((const unsigned char *)"GL_APPLE_client_storage", strExt) ? GL_TRUE : GL_FALSE; rect_texture = gluCheckExtension((const unsigned char *)"GL_EXT_texture_rectangle", strExt) ? GL_TRUE : GL_FALSE; // Setup some basic OpenGL stuff glPixelStorei(GL_UNPACK_ALIGNMENT, 1); glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); glColor4f(1.0f, 1.0f, 1.0f, 1.0f); glClearColor(0.0f, 0.0f, 0.0f, 1.0f); glClear(GL_COLOR_BUFFER_BIT); // Loads the shaders shader=LoadShader(GL_FRAGMENT_SHADER,"/Users/alexandremathieu/fragment.fs"); program=glCreateProgram(); glAttachShader(program, shader); glLinkProgram(program); glUseProgram(program); [NSOpenGLContext clearCurrentContext]; [glLock unlock]; image_width = 1024; image_height = 512; image_depth = 16; image_type = GL_UNSIGNED_SHORT_1_5_5_5_REV; image_base = (GLubyte *) calloc(((IMAGE_COUNT * image_width * image_height) / 3) * 4, image_depth >> 3); if (image_base == nil) { [self release]; return nil; } // Create and load textures for the first time [self loadTextures:GL_TRUE]; // Init fps timer //gettimeofday(&cycle_time, NULL); drawBG = YES; // Call for a redisplay noDisplay = YES; PSXDisplay.Disabled = 1; [self setNeedsDisplay:true]; return self; } And here is the "render screen" function wich basically...renders the screen. - (void)renderScreen { int bufferIndex = whichImage; glBindTexture(GL_TEXTURE_RECTANGLE_EXT, bufferIndex+1); glUseProgram(program); int loc=glGetUniformLocation(program, "texture"); glUniform1i(loc,bufferIndex+1); glTexSubImage2D(GL_TEXTURE_RECTANGLE_EXT, 0, 0, 0, image_width, image_height, GL_BGRA, image_type, image[bufferIndex]); glBegin(GL_QUADS); glTexCoord2f(0.0f, 0.0f); glVertex2f(-1.0f, 1.0f); glTexCoord2f(0.0f, image_height); glVertex2f(-1.0f, -1.0f); glTexCoord2f(image_width, image_height); glVertex2f(1.0f, -1.0f); glTexCoord2f(image_width, 0.0f); glVertex2f(1.0f, 1.0f); glEnd(); [[self openGLContext] flushBuffer]; [NSOpenGLContext clearCurrentContext]; //[glLock unlock]; } and finally here's the shader. uniform sampler2DRect texture; void main() { vec4 color, texel; color = gl_Color; texel = texture2DRect(texture, gl_TexCoord[0].xy); color *= texel; // Begin Shader float gray=0.0; gray+=(color.r + color.g + color.b)/3.0; color=vec4(gray,gray,gray,color.a); // End Shader gl_FragColor = color; } The loading and using of shaders works since I am able to turn the screen all red with this shader void main(){ gl_FragColor=vec4(1.0,0.0,0.0,1.0); } If the shader contains a syntax error I get an error message from the LoadShader function etc. If I remove the use of the shader, everything works normally. I think the problem comes from the "passing the texture as a uniform parameter" thing. But these are my very firsts step with openGL and I cant be sure of anything. Don't hesitate to ask for more info. Thank you Stack O.

    Read the article

  • Observations in Migrating from JavaFX Script to JavaFX 2.0

    - by user12608080
    Observations in Migrating from JavaFX Script to JavaFX 2.0 Introduction Having been available for a few years now, there is a decent body of work written for JavaFX using the JavaFX Script language. With the general availability announcement of JavaFX 2.0 Beta, the natural question arises about converting the legacy code over to the new JavaFX 2.0 platform. This article reflects on some of the observations encountered while porting source code over from JavaFX Script to the new JavaFX API paradigm. The Application The program chosen for migration is an implementation of the Sudoku game and serves as a reference application for the book JavaFX – Developing Rich Internet Applications. The design of the program can be divided into two major components: (1) A user interface (ideally suited for JavaFX design) and (2) the puzzle generator. For the context of this article, our primary interest lies in the user interface. The puzzle generator code was lifted from a sourceforge.net project and is written entirely in Java. Regardless which version of the UI we choose (JavaFX Script vs. JavaFX 2.0), no code changes were required for the puzzle generator code. The original user interface for the JavaFX Sudoku application was written exclusively in JavaFX Script, and as such is a suitable candidate to convert over to the new JavaFX 2.0 model. However, a few notable points are worth mentioning about this program. First off, it was written in the JavaFX 1.1 timeframe, where certain capabilities of the JavaFX framework were as of yet unavailable. Citing two examples, this program creates many of its own UI controls from scratch because the built-in controls were yet to be introduced. In addition, layout of graphical nodes is done in a very manual manner, again because much of the automatic layout capabilities were in flux at the time. It is worth considering that this program was written at a time when most of us were just coming up to speed on this technology. One would think that having the opportunity to recreate this application anew, it would look a lot different from the current version. Comparing the Size of the Source Code An attempt was made to convert each of the original UI JavaFX Script source files (suffixed with .fx) over to a Java counterpart. Due to language feature differences, there are a small number of source files which only exist in one version or the other. The table below summarizes the size of each of the source files. JavaFX Script source file Number of Lines Number of Character JavaFX 2.0 Java source file Number of Lines Number of Characters ArrowKey.java 6 72 Board.fx 221 6831 Board.java 205 6508 BoardNode.fx 446 16054 BoardNode.java 723 29356 ChooseNumberNode.fx 168 5267 ChooseNumberNode.java 302 10235 CloseButtonNode.fx 115 3408 CloseButton.java 99 2883 ParentWithKeyTraversal.java 111 3276 FunctionPtr.java 6 80 Globals.java 20 554 Grouping.fx 8 140 HowToPlayNode.fx 121 3632 HowToPlayNode.java 136 4849 IconButtonNode.fx 196 5748 IconButtonNode.java 183 5865 Main.fx 98 3466 Main.java 64 2118 SliderNode.fx 288 10349 SliderNode.java 350 13048 Space.fx 78 1696 Space.java 106 2095 SpaceNode.fx 227 6703 SpaceNode.java 220 6861 TraversalHelper.fx 111 3095 Total 2,077 79,127 2531 87,800 A few notes about this table are in order: The number of lines in each file was determined by running the Unix ‘wc –l’ command over each file. The number of characters in each file was determined by running the Unix ‘ls –l’ command over each file. The examination of the code could certainly be much more rigorous. No standard formatting was performed on these files.  All comments however were deleted. There was a certain expectation that the new Java version would require more lines of code than the original JavaFX script version. As evidenced by a count of the total number of lines, the Java version has about 22% more lines than its FX Script counterpart. Furthermore, there was an additional expectation that the Java version would be more verbose in terms of the total number of characters.  In fact the preceding data shows that on average the Java source files contain fewer characters per line than the FX files.  But that's not the whole story.  Upon further examination, the FX Script source files had a disproportionate number of blank characters.  Why?  Because of the nature of how one develops JavaFX Script code.  The object literal dominates FX Script code.  Its not uncommon to see object literals indented halfway across the page, consuming lots of meaningless space characters. RAM consumption Not the most scientific analysis, memory usage for the application was examined on a Windows Vista system by running the Windows Task Manager and viewing how much memory was being consumed by the Sudoku version in question. Roughly speaking, the FX script version, after startup, had a RAM footprint of about 90MB and remained pretty much the same size. The Java version started out at about 55MB and maintained that size throughout its execution. What About Binding? Arguably, the most striking observation about the conversion from JavaFX Script to JavaFX 2.0 concerned the need for data synchronization, or lack thereof. In JavaFX Script, the primary means to synchronize data is via the bind expression (using the “bind” keyword), and perhaps to a lesser extent it’s “on replace” cousin. The bind keyword does not exist in Java, so for JavaFX 2.0 a Data Binding API has been introduced as a replacement. To give a feel for the difference between the two versions of the Sudoku program, the table that follows indicates how many binds were required for each source file. For JavaFX Script files, this was ascertained by simply counting the number of occurrences of the bind keyword. As can be seen, binding had been used frequently in the JavaFX Script version (and does not take into consideration an additional half dozen or so “on replace” triggers). The JavaFX 2.0 program achieves the same functionality as the original JavaFX Script version, yet the equivalent of binding was only needed twice throughout the Java version of the source code. JavaFX Script source file Number of Binds JavaFX Next Java source file Number of “Binds” ArrowKey.java 0 Board.fx 1 Board.java 0 BoardNode.fx 7 BoardNode.java 0 ChooseNumberNode.fx 11 ChooseNumberNode.java 0 CloseButtonNode.fx 6 CloseButton.java 0 CustomNodeWithKeyTraversal.java 0 FunctionPtr.java 0 Globals.java 0 Grouping.fx 0 HowToPlayNode.fx 7 HowToPlayNode.java 0 IconButtonNode.fx 9 IconButtonNode.java 0 Main.fx 1 Main.java 0 Main_Mobile.fx 1 SliderNode.fx 6 SliderNode.java 1 Space.fx 0 Space.java 0 SpaceNode.fx 9 SpaceNode.java 1 TraversalHelper.fx 0 Total 58 2 Conclusions As the JavaFX 2.0 technology is so new, and experience with the platform is the same, it is possible and indeed probable that some of the observations noted in the preceding article may not apply across other attempts at migrating applications. That being said, this first experience indicates that the migrated Java code will likely be larger, though not extensively so, than the original Java FX Script source. Furthermore, although very important, it appears that the requirements for data synchronization via binding, may be significantly less with the new platform.

    Read the article

  • Trying to run my code and compiler seems to just close after it executes [migrated]

    - by Shane
    I am trying to run a program and the compiler seems to just crash right after it executes ... i have no build errors so i am wondering what the hell is going on ... I am a bit of a novice so all help would be appreciated =). I don't know if you might have time to scan through the code but this is what i have got : using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApplication1 { public class Student { string Fname, Lname, Program ; int Sid ; // Inputting information for students public void InputStudentInfo () { Console.WriteLine ("Please enter your first name") ; Fname = Console.ReadLine() ; Console.WriteLine ("Please enter you last name") ; Lname = Console.ReadLine() ; Console.WriteLine ("Please enter you student ID#") ; Sid = int.Parse(Console.ReadLine()) ; Console.WriteLine ("Enter the Program that you are completeing") ; Program = Console.ReadLine() ; } // Printing information for students public void PrintStudentInfo () { Console.Write (" Your name is " + Fname) ; Console.Write(" " + Lname); Console.WriteLine (" Your student identification number is " + Sid) ; Console.WriteLine (" The program you are registered for is " + Program) ; } /* public void MenuInterface() { Console.WriteLine (" 1. Input Student information" ) ; Console.WriteLine (" 2. Input Course information" ) ; Console.WriteLine (" 3. Input Grade information" ) ; Console.WriteLine (" 4. Print Course information" ) ; Console.WriteLine (" 5. Print Student information" ) ; Console.WriteLine (" 6. Print Grade information" ) ; Console.WriteLine (" 7. Print Student information including Course they are registered in and the grade obtained for that course" ) ; Console.WriteLine (" 8. Print grade info of the course in which student has achieved the highest grade" ) ; Console.WriteLine (" 0. Exit") ; Console.WriteLine (" Please select a choice from 0-8") ; accode = Console.ReadLine(); } */ } public class Course { string course1, course2, course3 ; int Stuid ; // Inputting Course Information public void InputCourseInfo () { Console.WriteLine (" Please re-enter your identification number") ; Stuid = int.Parse(Console.ReadLine()) ; Console.WriteLine (" Enter the name of your first course") ; course1 = Console.ReadLine() ; Console.WriteLine (" Enter the name of your second course") ; course2 = Console.ReadLine() ; Console.WriteLine (" Enter the name of your third course") ; course3 = Console.ReadLine() ; } // Printing Course Information public void PrintCourseInfo () { Console.WriteLine (" Your ID # is " + Stuid) ; Console.Write (" The Courses you selected are " + course1) ; Console.Write("," + course2); Console.Write(" and " + course3); } } public class Grade : Course { int Studentid ; int [] hwgrade ; int [] cwgrade ; int [] midegrade ; int [] finalegrade ; int [] totalgrade ; string coursename ; public Grade ( string cname , int Studentident , int [] homework , int [] classwork , int [] midexam , int [] finalexam) { coursename = cname ; Studentid = Studentident ; hwgrade = homework ; cwgrade = classwork ; midegrade = midexam ; finalegrade = finalexam ; } public string coname { get { return coursename ; } set { coursename = value ; } } public int Studentidenty { get { return Studentid ; } set { Studentid = value ; } } public void InputGradeInfo() { Console.WriteLine (" Please enter your Student ID" ) ; grade.Studentidenty = Console.ReadLine() ; for ( int i = 0; i < 3; i++) { Console.Writeline (" Please enter the Course name" ) ; grade.coname[i] = Console.Readline() ; Console.Writeline (" Please enter your homework grade") ; grade.hwgrade[i] = int.parse(Console.Readline()) ; // ..... } } public void CalcTotalGrade() { for (int i = 0; i < 3; i++) { grade.courseper[i] = (grade.hwgrade[i] + grade.cwgrade[i]) / 2; grade.finalper[i] = (grade.midexam[i] + grade.finalegrade[i]) / 2; grade.totalgrade[i] = (grade.courseper[i] + finalper[i]) / 2; } } public void PrintGradeInfo() { for ( int i = 0; i < 3; i++) { Console.Writeline (" Your homework grade is" + grade.hwgrade[i]) ; // ..... } } static void Main(string[] args) { int accode ; Student student = new Student() ; Course course = new Course() ; Grade grade = new Grade() ; do { Console.WriteLine(" 1. Input Student information"); Console.WriteLine(" 2. Input Course information"); Console.WriteLine(" 3. Input Grade information"); Console.WriteLine(" 4. Print Course information"); Console.WriteLine(" 5. Print Student information"); Console.WriteLine(" 6. Print Grade information"); Console.WriteLine(" 7. Print Student information including Course they are registered in and the grade obtained for that course"); Console.WriteLine(" 8. Print grade info of the course in which student has achieved the highest grade"); Console.WriteLine(" 0. Exit"); Console.WriteLine(" Please select a choice from 0-8"); accode = Console.ReadLine(); switch (accode) { case 1: student.InputStudentInfo(); break; case 2: course.InputCourseInfo(); break; case 3: grade.InputGradeInfo(); break; case 4: course.PrintCourseInfo(); break; case 5: student.PRintStudentInfo(); break; case 6: grade.PrintGradeInfo(); break; case 0: Console.WriteLine(" You have chosen to exit the program have a good day. =)"); break; } } while (accode != 0); Console.ReadKey(); } } }

    Read the article

  • Lambda&rsquo;s for .NET made easy&hellip;

    - by mbcrump
    The purpose of my blog is to explain things for a beginner to intermediate c# programmer. I’ve seen several blog post that use lambda expressions always assuming the audience is familiar with them. The purpose of this post is to make them simple and easily understood. Let’s begin with a definition. A lambda expression is an anonymous function that can contain expressions and statements, and can be used to create delegates or expression tree types. So anonymous function… delegates or expression tree types? I don’t get it??? Confused yet?   Lets break this into a few definitions and jump right into the code. anonymous function – is an "inline" statement or expression that can be used wherever a delegate type is expected. delegate - is a type that references a method. Once a delegate is assigned a method, it behaves exactly like that method. The delegate method can be used like any other method, with parameters and a return value. Expression trees - represent code in a tree-like data structure, where each node is an expression, for example, a method call or a binary operation such as x < y.   Don’t worry if this still sounds confusing, lets jump right into the code with a simple 3 line program. We are going to use a Function Delegate (all you need to remember is that this delegate returns a value.) Lambda expressions are used most commonly with the Func and Action delegates, so you will see an example of both of these. Lambda Expression 3 lines. using System; using System.Collections.Generic; using System.Linq; using System.Text;   namespace ConsoleApplication7 {     class Program     {          static void Main(string[] args)         {             Func<int, int> myfunc = x => x *x;             Console.WriteLine(myfunc(6).ToString());             Console.ReadLine();         }       } } Is equivalent to Old way of doing it. using System; using System.Collections.Generic; using System.Linq; using System.Text;   namespace ConsoleApplication7 {     class Program     {          static void Main(string[] args)         {               Console.WriteLine(myFunc(6).ToString());             Console.ReadLine();         }            static int myFunc(int x)          {              return x * x;            }       } } In the example, there is a single parameter, x, and the expression is x*x. I’m going to stop here to make sure you are still with me. A lambda expression is an unnamed method written in place of a delegate instance. In other words, the compiler converts the lambda expression to either a : A delegate instance An expression tree All lambda have the following form: (parameters) => expression or statement block Now look back to the ones we have created. It should start to sink in. Don’t get stuck on the => form, use it as an identifier of a lambda. A Lamba expression can also be written in the following form: Lambda Expression. using System; using System.Collections.Generic; using System.Linq; using System.Text;   namespace ConsoleApplication7 {     class Program     {          static void Main(string[] args)         {             Func<int, int> myFunc = x =>             {                 return x * x;             };               Console.WriteLine(myFunc(6).ToString());             Console.ReadLine();         }       } } This form may be easier to read but consumes more space. Lets try an Action delegate – this delegate does not return a value. Action Delegate example. using System; using System.Collections.Generic; using System.Linq; using System.Text;   namespace ConsoleApplication7 {     class Program     {          static void Main(string[] args)         {             Action<string> myAction = (string x) => { Console.WriteLine(x); };             myAction("michael has made this so easy");                                   Console.ReadLine();         }       } } Lambdas can also capture outer variables (such as the example below) A lambda expression can reference the local variables and parameters of the method in which it’s defined. Outer variables referenced by a lambda expression are called captured variables. Capturing Outer Variables using System; using System.Collections.Generic; using System.Linq; using System.Text;   namespace ConsoleApplication7 {     class Program     {          static void Main(string[] args)         {             string mike = "Michael";             Action<string> myAction = (string x) => {                 Console.WriteLine("{0}{1}", mike, x);          };             myAction(" has made this so easy");                                   Console.ReadLine();         }       } } Lamba’s can also with a strongly typed list to loop through a collection.   Used w a strongly typed list. using System; using System.Collections.Generic; using System.Linq; using System.Text;   namespace ConsoleApplication7 {     class Program     {          static void Main(string[] args)         {             List<string> list = new List<string>() { "1", "2", "3", "4" };             list.ForEach(s => Console.WriteLine(s));             Console.ReadLine();         }       } } Outputs: 1 2 3 4 I think this will get you started with Lambda’s, as always consult the MSDN documentation for more information. Still confused? Hopefully you are not.

    Read the article

  • WebLogic Server 12c????????????????????????????????????/???????WebLogic Server 12c Forum 2012?????

    - by ???02
    2012?1??????WebLogic Server 12c???200??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????2012?8????????WebLogic Server 12c Forum 2012????????·??????????????????????????/?????????????????(???) ????????????WebLogic Server 12c????????? ??WebLogic Server???????·???????WebLogic Server?????????????????????????????????????WebLogic Server 12c Forum 2012?????????????????·????????????????????????????????????????????????????·?????????????WebLogic Server 12c??????????????/????????????? ???????????????????????????? ????????????????????????????????????? ?????? ??????????????????????????????????? ??????????????????????????????????????????????????????????????????????????“??????????????????????????”????????????????????????WebLogic Server 11g?????????????????? (1)????????????????????! = ??ID????????? WebLogic Server??????????????????????????????????????????????????????????????????????? ????????????????? ?????????·??????????????????? ??????init.d???????????? ???????????????ID????(boot.properties)??????????????????????WebLogic Server?????????????????????????????????? ???ID????????? <DOMAIN_HOME>/servers//security???????????·?????boot.properties????????????2??????? username= password= ???????????????????WebLogic Server?????????????????????????????????????????????????????????????????? (2)WLST???????????????????! = WLST????????? WebLogic Server???????????????????????????????????????????????????????????????/?????????????WLST(WebLogic Scripting Tool)????????????????????????????????????????????????????????????????????/????????????WLST?????????? ?????????????WLST???????????????????????Python?Java?????Jython?????????????WebLogic Server?????????????MBean???????????????????????????????????WLST?????????????Excel????????????????????????????????????????????????????????????????????????????WLST?????????????????????????????????? ?WLST???????????? ????????[????·????]-[???????]?????????????????[??]???????? ???????????????????????????[?????]????????py?????WLST???????????????????????????[??]??????????????????? ???????????????WLST?????????????????????WLST???????????????????????????????????????????????????????????????????? (3)????SQL?WebLogic Server???????! = ????·????? ??????????WebLogic Server??????????????????????????????SQL??????????????????????????????????·????????????????????????????????????????·???????????WebLogic Server????????·???????·???????????????WebLogic Server????/?????????????????????????????????????JDBC????????????????????????????SQL?ResultSet?????????????·????????? ????·????????????? ?????·??????? ????????[??]-[????]-[?????]-?????????????WebLogic Server?????/?????????????????????????????????????????[weblogic]-[jdbc]-[sql]-[DebugJDBCSQL]?????????[???]???????? ??????JDBC?????·???????·????????? ????/???????????????????????/???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? (4)[??]??????????????! = [??????????]????? ?[??]????????????????????????????????????????????????????????????????????????????[??]?????????????????????????????????2??????????????????????????????????????????????????????????????????????????????????????????????????????[??????????]?????????2?????????????????????????? ?????????2????????????? ????????[??????]-[???]-[???????????????]??????[???·???????]?????[??????????]?????????[??]???????? ??????????????????????????? (5)????????????????????????????! = ?V$SESSION.PROGRAM?????????????? ???Oracle Database?????????????????????????? WebLogic Server?????????????????????????????????????????????????????????????????????????????1??WebLogic Server????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ???????????????V$SESSION.PROGRAM?????????????Oracle Database?????????·?????????????????????????????????V$SESSION????????????????PROGRAM????????????????????????????WebLogic Server???????????????????????????JDBC Thin Client???JDBC????????????????????????????????????????PROGRAM???????????????????????·?????????????????????? V$SESSION.PROGRAM???????????????????????????? ?V$SESSION.PROGRAM??????????????? ???????????([???JDBC?????????]??)?[?????]?????1??????? v$session.program= (6)???·???????·????????! = ????·????·????????? WebLogic Server?????????????????????????????????(???·??)????????????????·???????1??????????????????????????????????????????WebLogic Server?????????????????????????????????? ??????????????????·????·?????????????????????????WebLogic Server?????????????????????????????????????? ???????????JDK???????Log4j????????????????WebLogic Server???????????????? WebLogic Server????????JDK?Log4j??????????????????JDK?????????? ????·????·???????????????? ?????·????·????????? JDK???Log4j?????????????????????/?????????????? ?JDK???:weblogic.logging.ServerLoggingHandler ?Log4j???:weblogic.logging.log4j.ServerLoggingAppender ??????Log4j?????????????(????)? <appender name="file" class="org.apache.log4j.FileAppender"> <param name="File" value=“applog.log" /> <param name="Append" value="true" /> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d %5p %c{1} - %m%n" /> </layout> </appender> <appender name="server" class="weblogic.logging.log4j.ServerLoggingAppender"/> ?????????????????????????????????????????WebLogic Server?????????????????????????????????????? ?JDK???:-Djava.util.loggin.config.file=<PATH> ?Log4j???:-Dlog4j.configuration=<PATH> ???????????WAR??????????????????????·????·??????????WebLogic Server??????????????????????????????????????WebLogic Server???????????????????? (7)BEA??????????????????????! = GetMessage??????? WebLogic Server????????·??????????????(?BEA-XXXXXX??????????????????BEA?????)????WebLogic Server?HTML??????????????????Web????????????????????????????????????????????? ????????????GetMessage?????????????BEA?????????????????????????????????????????? ?GetMessage????????? java?????WebLogic Server?GetMessage???????????? java weblogic.GetMessage ?????????? ?-id XXXX:???????????? ?-verbose:????????? ?-lang XX:???????(?????????????????????????????????????) ????BEA-000337?????????????????????????????? java weblogic.GetMessage -verbose -id 000337 -lang ja 000337: ?????"{2}"?????{0}?"{1}"??????????????????????????(StuckThreadMaxTime)"{3}"?????????????·????: {4} L10n?????: weblogic.kernel I18n?????: weblogic.kernel ??????: WebLogicServer ???: ??? ????·????: false ????????: ???????????????????????????????? ??: ???????????????????????????????????? ?????: ??????????????????????????????????????????????????????????????·???(weblogic.Admin THREAD_DUMP)????????? ?????????BEA?????????????????????????????????????????????????????????????????????????????????? ????????“WebLogic??”!? WebLogic Server 12c????/??? ????????????? ???????????? ????????????????? ?????????????? ???????????? ????????????WebLogic Server???????????????????????????????????????????????WebLogic Server 12c?????????????????????????????????????????????????????????WebLogic Server 11g(10.3.6)???????????? ?????????Mac OS X???(???????)?IE 6?7??????????????? ??OTN??????????????????System Requirements and Supported Platforms for WebLogic Server 12c (12.1.1.x)?????????????Mac OS?????????????2012?8?2?????Mac OS X Snow Leopard????Java SE 7?????????? ???Internet Explorer(IE) 6.x??7.x???????????????????IE????????IE 8.x???????????? ????Web?????WebLogic Server?????????Web???·??????64?????????????(WebLogic Server??????????64?????)?????????WebLogic Server????????????????????????????????????????? ?RESTful????????? Java EE 6?JAX-RS????????????WebLogic Server 12c???????????????????????????????????? ?RESTful??????????? [????]-[??]-[??]?[RESTful??????????]?????????WebLogic Server??????????????????URL?????????????????????????? http(s)://:/management/tenant-monitoring/servers ???????servers??????clusters???applications???datasources??????????????????????????????????????????????? ????HTML??????JSON?XML???????????????????????????????????????????????????????????????????? ?JDBC????????(1):??????·???? ???????????????????????WebLogic Server??????????????????????????????????12c??Active GridLink for RAC???????????????????????????????????? 1??????????·?????????????????????[????]?????????[??????]????????????????????????????????????????????????????????????????????? <DOMAIN_HOME>/servers//logs/datasource.log ?????????????????????????????????????? ??????????????????????WLDF????????????????WebLogic Server 12c?????????????????????? ?JDBC????????(2):?????????? ????????????????[??]-[?????]???[????]?????????????????????????????????????????????????????????????????WebLogic Server 12c?????????????????????????????????????? ??????????????????????????????????WebLogic Server 11g(10.3.1)???1??????????????????????????????????????? ?JDBC????????(3):????????? WebLogic Server 12c??[??]-[?????]????????????????????[?????????]???1???????????????????????????????????????????????????????????????????????????????????????????????????????????????Oracle Database?????????????????????????? ErrorCode ????? 3113 ???????end-of-file???????? 3114 Oracle?????????? 1033 Oracle??????????????? 1034 Oracle??????? 1089 ?????????? - ?????????? 1090 ???????? - ?????????? 17002 I/O?? ?????????(1):?????/?????????????????? ??????????2?????? 1???WebLogic Server????????????????????????????????????????? -Dweblogic.management.username= -Dweblogic.management.password= ????????????ID???????????????? ?????????(2):SSL????Certicom?????? SSL?????Certicom(?????10.3.3?????)???????JSSE(Java Secure Socket Extension)????????????????????????????????????????? ??????????????????????????????? ????????????WebLogic Server?????????????????????????????????Java?????????·????2??????????Java????????????????nodemanager.properties?????????????StartScriptEnabled?????????false??true?????? ?????????????false?????????????WebLogic Server??????????????????true??????????????startWebLogic???????????????WebLogic Server??????????????startWebLogic???????????????????????????????????????????????????????????????? ???/???????(1):setDomainEnv???????????????? ??/?????????????“?????·???”????????????????????????????2???? 1??setDomainEnv?????????????????????????????32???JDK????????Perm????????????? ?WebLogic Server 11g(10.3.5) MEM_PERM_SIZE_64BIT="-XX:PermSize=128m" MEM_PERM_SIZE_32BIT="-XX:PermSize=48m" ... MEM_MAX_PERM_SIZE_64BIT="-XX:MaxPermSize=256m" MEM_MAX_PERM_SIZE_32BIT="-XX:MaxPermSize=128m" ?WebLogic Server 12c(12.1.1) MEM_PERM_SIZE_64BIT="-XX:PermSize=128m" MEM_PERM_SIZE_32BIT="-XX:PermSize=128m" ... MEM_MAX_PERM_SIZE_64BIT="-XX:MaxPermSize=256m" MEM_MAX_PERM_SIZE_32BIT="-XX:MaxPermSize=256m" ???/???????(2):stopWebLogic??????shutdown.py????????? ??/???????????2????stopWebLogic??????????????shutdown.py??????????????????????????????ID/????????????????????????shutdown.py??????????????WebLogic Server 11g(10.3.3)?????????????ID????????????????????WebLogic Server 12c???????? ????????????? ?????????????/??? ???????????/?????????????? ???KernelMBean????UseConcurrentQueueForRequestManager?????????????????????????????[????]--[??????]-[??]?[?????·???????????????]??????????????????????????????????????????MBean???????????????????????????????????????????????????????????????????????????????????????????(???)? ??1???Windows?????????beasvc.exe????wlsvc.exe????????????????????????wlsvc _???????BEA????????????????(???)? ????WLST???????Jython???????????????????2.1??2.2.1????????(???11g??2.2.1???????)???????????????……?(???)? ???????WebLogic Server 12c???????????????????????/????????????????????????????????????????WebLogic Server?????????WebLogic Server????????????Facebook?????????WebLogic!??????????????

    Read the article

  • /usr/include/stdc-predef.h:30:26: fatal error: bits/predefs.h: No such file or directory

    - by G_T
    Im trying to locally install a program which is written in C++. I have downloaded the program and am attempting to use the "make" command to compile the program as the programs instructions dictate. However when I do I get this error: /usr/include/stdc-predef.h:30:26: fatal error: bits/predefs.h: No such file or directory compilation terminated. Looking around on the internet some people seem to address this problem by sudo apt-get install libc6-dev-i386 I checked to see if this package was installed and it was not. When I try to install it I get E: Unable to locate package libc6-dev-i386 I have already run sudo apt get update Im sure this is a rookie question but any help is appreciated, I'm running 13.10 32-bit.

    Read the article

  • To ref or not to ref

    - by nmarun
    So the question is what is the point of passing a reference type along with the ref keyword? I have an Employee class as below: 1: public class Employee 2: { 3: public string FirstName { get; set; } 4: public string LastName { get; set; } 5:  6: public override string ToString() 7: { 8: return string.Format("{0}-{1}", FirstName, LastName); 9: } 10: } In my calling class, I say: 1: class Program 2: { 3: static void Main() 4: { 5: Employee employee = new Employee 6: { 7: FirstName = "John", 8: LastName = "Doe" 9: }; 10: Console.WriteLine(employee); 11: CallSomeMethod(employee); 12: Console.WriteLine(employee); 13: } 14:  15: private static void CallSomeMethod(Employee employee) 16: { 17: employee.FirstName = "Smith"; 18: employee.LastName = "Doe"; 19: } 20: }   After having a look at the code, you’ll probably say, Well, an instance of a class gets passed as a reference, so any changes to the instance inside the CallSomeMethod, actually modifies the original object. Hence the output will be ‘John-Doe’ on the first call and ‘Smith-Doe’ on the second. And you’re right: So the question is what’s the use of passing this Employee parameter as a ref? 1: class Program 2: { 3: static void Main() 4: { 5: Employee employee = new Employee 6: { 7: FirstName = "John", 8: LastName = "Doe" 9: }; 10: Console.WriteLine(employee); 11: CallSomeMethod(ref employee); 12: Console.WriteLine(employee); 13: } 14:  15: private static void CallSomeMethod(ref Employee employee) 16: { 17: employee.FirstName = "Smith"; 18: employee.LastName = "Doe"; 19: } 20: } The output is still the same: Ok, so is there really a need to pass a reference type using the ref keyword? I’ll remove the ‘ref’ keyword and make one more change to the CallSomeMethod method. 1: class Program 2: { 3: static void Main() 4: { 5: Employee employee = new Employee 6: { 7: FirstName = "John", 8: LastName = "Doe" 9: }; 10: Console.WriteLine(employee); 11: CallSomeMethod(employee); 12: Console.WriteLine(employee); 13: } 14:  15: private static void CallSomeMethod(Employee employee) 16: { 17: employee = new Employee 18: { 19: FirstName = "Smith", 20: LastName = "John" 21: }; 22: } 23: } In line 17 you’ll see I’ve ‘new’d up the incoming Employee parameter and then set its properties to new values. The output tells me that the original instance of the Employee class does not change. Huh? But an instance of a class gets passed by reference, so why did the values not change on the original instance or how do I keep the two instances in-sync all the times? Aah, now here’s the answer. In order to keep the objects in sync, you pass them using the ‘ref’ keyword. 1: class Program 2: { 3: static void Main() 4: { 5: Employee employee = new Employee 6: { 7: FirstName = "John", 8: LastName = "Doe" 9: }; 10: Console.WriteLine(employee); 11: CallSomeMethod(ref employee); 12: Console.WriteLine(employee); 13: } 14:  15: private static void CallSomeMethod(ref Employee employee) 16: { 17: employee = new Employee 18: { 19: FirstName = "Smith", 20: LastName = "John" 21: }; 22: } 23: } Viola! Now, to prove it beyond doubt, I said, let me try with another reference type: string. 1: class Program 2: { 3: static void Main() 4: { 5: string name = "abc"; 6: Console.WriteLine(name); 7: CallSomeMethod(ref name); 8: Console.WriteLine(name); 9: } 10:  11: private static void CallSomeMethod(ref string name) 12: { 13: name = "def"; 14: } 15: } The output was as expected, first ‘abc’ and then ‘def’ - proves the 'ref' keyword works here as well. Now, what if I remove the ‘ref’ keyword? The output should still be the same as the above right, since string is a reference type? 1: class Program 2: { 3: static void Main() 4: { 5: string name = "abc"; 6: Console.WriteLine(name); 7: CallSomeMethod(name); 8: Console.WriteLine(name); 9: } 10:  11: private static void CallSomeMethod(string name) 12: { 13: name = "def"; 14: } 15: } Wrong, the output shows ‘abc’ printed twice. Wait a minute… now how could this be? This is because string is an immutable type. This means that any time you modify an instance of string, new memory address is allocated to the instance. The effect is similar to ‘new’ing up the Employee instance inside the CallSomeMethod in the absence of the ‘ref’ keyword. Verdict: ref key came to the rescue and saved the planet… again!

    Read the article

  • visual basic coach needed [closed]

    - by Danny
    0 down vote favorite I am trying to learn visual basic. I used to program in gw-basic and have trouble learning vb.net by reading and googling all the time. It takes so much time to find the answers to my programming problems and even then i do not understand the why it have to be done that way. I have beginners questions like finding childwindows using enumwindow. Then googling for hours and hours i do not seem to grasp it (must be my old age). I would like to get someone i could learn from by asking questions about what i want to program and learn from it. not to just finish the program but to learn and understand it too. Someone who dont find questions stupid to ask as i try to build my understanding of the visual basic environment. I hope to communicate by using skype voice or chat or other direct means when time permits it. Cheers, Danny

    Read the article

  • F# for the C# Programmer

    - by mbcrump
    Are you a C# Programmer and can’t make it past a day without seeing or hearing someone mention F#?  Today, I’m going to walk you through your first F# application and give you a brief introduction to the language. Sit back this will only take about 20 minutes. Introduction Microsoft's F# programming language is a functional language for the .NET framework that was originally developed at Microsoft Research Cambridge by Don Syme. In October 2007, the senior vice president of the developer division at Microsoft announced that F# was being officially productized to become a fully supported .NET language and professional developers were hired to create a team of around ten people to build the product version. In September 2008, Microsoft released the first Community Technology Preview (CTP), an official beta release, of the F# distribution . In December 2008, Microsoft announced that the success of this CTP had encouraged them to escalate F# and it is now will now be shipped as one of the core languages in Visual Studio 2010 , alongside C++, C# 4.0 and VB. The F# programming language incorporates many state-of-the-art features from programming language research and ossifies them in an industrial strength implementation that promises to revolutionize interactive, parallel and concurrent programming. Advantages of F# F# is the world's first language to combine all of the following features: Type inference: types are inferred by the compiler and generic definitions are created automatically. Algebraic data types: a succinct way to represent trees. Pattern matching: a comprehensible and efficient way to dissect data structures. Active patterns: pattern matching over foreign data structures. Interactive sessions: as easy to use as Python and Mathematica. High performance JIT compilation to native code: as fast as C#. Rich data structures: lists and arrays built into the language with syntactic support. Functional programming: first-class functions and tail calls. Expressive static type system: finds bugs during compilation and provides machine-verified documentation. Sequence expressions: interrogate huge data sets efficiently. Asynchronous workflows: syntactic support for monadic style concurrent programming with cancellations. Industrial-strength IDE support: multithreaded debugging, and graphical throwback of inferred types and documentation. Commerce friendly design and a viable commercial market. Lets try a short program in C# then F# to understand the differences. Using C#: Create a variable and output the value to the console window: Sample Program. using System;   namespace ConsoleApplication9 {     class Program     {         static void Main(string[] args)         {             var a = 2;             Console.WriteLine(a);             Console.ReadLine();         }     } } A breeze right? 14 Lines of code. We could have condensed it a bit by removing the “using” statment and tossing the namespace. But this is the typical C# program. Using F#: Create a variable and output the value to the console window: To start, open Visual Studio 2010 or Visual Studio 2008. Note: If using VS2008, then please download the SDK first before getting started. If you are using VS2010 then you are already setup and ready to go. So, click File-> New Project –> Other Languages –> Visual F# –> Windows –> F# Application. You will get the screen below. Go ahead and enter a name and click OK. Now, you will notice that the Solution Explorer contains the following: Double click the Program.fs and enter the following information. Hit F5 and it should run successfully. Sample Program. open System let a = 2        Console.WriteLine a As Shown below: Hmm, what? F# did the same thing in 3 lines of code. Show me the interactive evaluation that I keep hearing about. The F# development environment for Visual Studio 2010 provides two different modes of execution for F# code: Batch compilation to a .NET executable or DLL. (This was accomplished above). Interactive evaluation. (Demo is below) The interactive session provides a > prompt, requires a double semicolon ;; identifier at the end of a code snippet to force evaluation, and returns the names (if any) and types of resulting definitions and values. To access the F# prompt, in VS2010 Goto View –> Other Window then F# Interactive. Once you have the interactive window type in the following expression: 2+3;; as shown in the screenshot below: I hope this guide helps you get started with the language, please check out the following books for further information. F# Books for further reading   Foundations of F# Author: Robert Pickering An introduction to functional programming with F#. Including many samples, this book walks through the features of the F# language and libraries, and covers many of the .NET Framework features which can be leveraged with F#.       Functional Programming for the Real World: With Examples in F# and C# Authors: Tomas Petricek and Jon Skeet An introduction to functional programming for existing C# developers written by Tomas Petricek and Jon Skeet. This book explains the core principles using both C# and F#, shows how to use functional ideas when designing .NET applications and presents practical examples such as design of domain specific language, development of multi-core applications and programming of reactive applications.

    Read the article

  • How often are comments used in XML documents?

    - by Jeffrey Sweeney
    I'm currently developing a web-based XML managing program for a client (though I may 'market' it for future clients). Currently, it reads an XML document, converts it into manageable Javascript objects, and ultimately spits out indented, easy to read XML code. Edit: The program would be used by clients that don't feel like learning XML to add items or tags, but I (or another XML developer) may use the raw data for quick changes without using an editor. I feel like fundamentally, its ready for release, but I'm wondering if I should go the extra mile and allow support for remembering (and perhaps making) comments before generating the resulting XML. Considering that these XML files will probably never be read without a program interpreting it, should I really bother adding support for comments? I'll probably be the only one looking at raw files, and I usually don't use comments for XML anyway. So, are comments common/important in most XML documents?

    Read the article

  • Getting started as a programmer -- school or self-study?

    - by Cyberherbalist
    My son who has is married with two small children has decided that he needs a change of career, and is considering getting into programming. He would do well in the field, I am certain, but I am uncertain how to advise him with regards to a lengthy course of schooling, or just try to learn 'on the job", so to speak. I suspect that if he doesn't ultimately get at least an associate degree in program (like his old man), that his job possibilities are going to be very constrained. This isn't the Dot-Com Bubble, after all, when they'd hire you if you could spell c-o-m-p-u-t-e-r because they needed bodies and the ability to fog a mirror wasn't quite enough. Should he go for a full program at the university, a two-year program (he already has a 2-year degree in video production, so he's got the general ed requirements whipped), or does anyone think self-study alone might be enough? To get started, anyway. I started back in 1987 with COBOL and a 2-year degree, which seemed the minimum at the time, but perhaps things are different now?

    Read the article

  • Mass emailing bouncebacks- Sendblaster

    - by Matt
    I am currently using a mass emailer called sendblaster- if anyone has experience using this program for mass emails any help would be fantastic. The program has a feature that allows you to track reads and opens of emails sent, however the problem i have is with delivery failures/bouncebacks. The "manage bouncebacks" feature is very confusing, and appears to be incapable of showing which email addresses have bounced. For some reason the sender address does not receive delivery failures as with other mass email programs that I've used. If anyone knows a way to efficiently manage the delivery failures/bounceback using this program please help! Thanks

    Read the article

  • Adding Custom Pipeline code to the Pipeline Component Toolbox

    - by Geordie
    Add ... "C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin\GacUtil.exe" /nologo /i "$(TargetPath)" /f  xcopy "$(TargetPath)" "C:\Program Files\Microsoft BizTalk Server 2006\Pipeline Components" /d /y to the 'Post Build event command line' for the pipeline support component project in visual studio. This will automatically put the support dll in the GAC and BizTalk’s Pipeline component directory on building the solution/project. Build the project. Right Click on title bar and select Choose items. Click on the BizTalk Pipeline Components tab and select the new component from the list. If it is not available in the list Browse to the BizTalk pipeline component folder (C:\Program Files\Microsoft BizTalk Server 2006\Pipeline Components) and select the dll.

    Read the article

  • Reusing WCF Proxy to reduce Memory Usage

    - by Sudheer Kumar
    I am working on a program that uploads BLOB from DB to a Document Management System. I have a WCF service to interact with the DMS. I have a multi-threaded client program that uploads the BLOBs to DMS and every thread used to create and dispose a proxy instance for every record to update. When I have a large no of records to convert, I found that the tool’s memory foot print keeps increasing. After a little debugging I found that the WCF proxies are the culprits for excessive memory usage. I changed the program to re-use the proxies to the service, having one proxy per thread. So in some scenarios, it might be beneficial to re-use WCF proxies.

    Read the article

  • Executing Shell Commands - PHP or Python?

    - by chadpeppers
    I know basically two languages: Python and PHP. I am primarily a Drupal developer. I have a great idea in creating a command line program that will help some of the mundane tasks and bring my efficiency up quite a bit. The concept is that of a complete console program, almost like the days when I learned C++ using stdin/out. I want to use this came concept but for this program. I am going to be executing shell commands (mainly drush commands, if you are familiar with drush its drupals way of doing tasks like installing drupal, clearing cache, and other things). I am also wanting to do a database and save/execute through multiple objects and site profiles. My general question is this. Which language would be better suited to handle command line code? Drupal is written in PHP so I am leaned more towards that,but I know python seems to handle console programming a bit easier. Any help would be great!

    Read the article

  • Webcast Replay: OVCA Launch Channel Update

    - by Claudia Caramelli-Oracle
    Last 28 May we held a webcast about Oracle Virtual Compute Appliance (OVCA) launch update for the channel. A brief product overview of OVCA has been followed by some great OPN program content, resell criteria, OPN Incentive Program and Demo Equipment Program details. You can download the slides HERE, but remember, you need to be a registered member of the community to be able to access the workspace. If you are not a member yet, you can register here. We look forward to welcoming you to another webcast soon!

    Read the article

  • The Oracle Graduate Experience...A Graduates Perspective by Angelie Tierney

    - by david.talamelli
    [Note: Angelie has just recently joined Oracle in Australia in our 2011 Graduate Program. Last week I shared my thoughts on our 2011 Graduate Program, this week Angelie took some time to share her thoughts of our Graduate Program. The notes below are Angelie's overview from her experience with us starting with our first contact last year - David Talamelli] How does the 1 year program work? It consists of 3 weeks of training, followed by 2 rotations in 2 different Lines of Business (LoB's). The first rotation goes for 4 months, while your 2nd rotation goes for 7, when you are placed into your final LoB for the program. The interview process: After sorting through the many advertised graduate jobs, submitting so many resumes and studying at the same time, it can all be pretty stressful. Then there is the interview process. David called me on a Sunday afternoon and I spoke to him for about 30 minutes in a mini sort of phone interview. I was worried that working at Oracle would require extensive technical experience, but David stressed that even the less technical, and more business-minded person could, and did, work at Oracle. I was then asked if I would like to attend a group interview in the next weeks, to which I said of course! The first interview was a day long, consisting of a brief introduction, a group interview where we worked on a business plan with a group of other potential graduates and were marked by 3 Oracle employees, on our ability to work together and presentation. After lunch, we then had a short individual interview each, and that was the end of the first round. I received a call a few weeks later, and was asked to come into a second interview, at which I also jumped at the opportunity. This was an interview based purely on your individual abilities and would help to determine which Line of Business you would go to, should you land a graduate position. So how did I cope throughout the interview stages? I believe the best tool to prepare for the interview, was to research Oracle and its culture and to see if I thought I could fit into that. I personally found out about Oracle, its partners as well as competitors and along the way, even found out about their part (or Larry Ellison's specifically) in the Iron Man 2 movie. Armed with some Oracle information and lots of enthusiasm, I approached the Oracle Graduate Interview process. Why did I apply for an Oracle graduate position? I studied a Bachelor of Business/Bachelor of Science in IT, and wanted to be able to use both my degrees, while have the ability to work internationally in the future. Coming straight from university, I wasn't sure exactly what I wanted to do in terms of my career. With the program, you are rotated across various lines of business, to not only expose you to different parts of the business, but to also help you to figure out what you want to achieve out of your career. As a result, I thought Oracle was the perfect fit. So what can an Oracle ANZ Graduate expect? First things first, you can expect to line up for your visitor pass. Really. Next you enter a room full of unknown faces, graduates just like you, and then you realise you're in this with 18 other people, going through the same thing as you. 3 weeks later you leave with many memories, colleagues you can call your friends, and a video of your presentation. Vanessa, the Graduate Manager, will also take lots of photos and keep you (well) fed. Well that's not all you leave with, you are also equipped with a wealth of knowledge and contacts within Oracle, both that will help you throughout your career there. What training is involved? We started our Oracle experience with 3 weeks of training, consisting of employee orientation, extensive product training, presentations on the various lines of business (LoB's), followed by sales and presentation training. While there was potential for an information overload, maybe even death by Powerpoint, we were able to have access to the presentations for future reference, which was very helpful. This period also allowed us to start networking, not only with the graduates, but with the managers who presented to us, as well as through the monthly chinwag, HR celebrations and even with the sharing of tea facilities. We also had a team bonding day when we recorded a "commercial" within groups, and learned how to play an Irish drum. Overall, the training period helped us to learn about Oracle, as well as ourselves, and to prepare us for our transition into our rotations. Where to now? I'm now into my 2nd week of my first graduate rotation. It has been exciting to finally get out into the work environment and utilise that knowledge we gained from training. My manager has been a great mentor, extremely knowledgeable, and it has been good being able to participate in meetings, conference calls and make a contribution towards the business. And while we aren't necessarily working directly with the other graduates, they are still reachable via email, Pidgin and lunch and they are important as a resource and support, after all, they are going through a similar experience to you. While it is only the beginning, there is a lot more to learn and a lot more to experience along the way, especially because, as we learned during training, at Oracle, the only constant is change.

    Read the article

  • How To Delete, Move, or Rename Locked Files in Windows

    - by Chris Hoffman
    Windows won’t allow you to modify files that open programs have locked. if you try to delete a file and see a message that it’s open in a program, you’ll have to unlock the file (or close the program). In some cases, it may not be clear which program has locked a file – or a background process may have locked a file and not terminated correctly. You must unlock the stubborn file or folder to modify it. Note: Unlocking certain files and deleting them may cause problems with open programs. Don’t unlock and delete files that should remain locked, including Windows system files. How To Delete, Move, or Rename Locked Files in Windows HTG Explains: Why Screen Savers Are No Longer Necessary 6 Ways Windows 8 Is More Secure Than Windows 7

    Read the article

  • How to enable Mic in Wine (pulseaudio)

    - by Postadelmaga
    I'm not able to make mic work with wine 1.5 I found some suggestions but they don't seem to work: -Disable winepulse.drv (aka: PulseAudio): "A1: Go to winecfg, in the tab 'libraries', enter 'winepulse.drv' in the box and click on add, click yes on the warning. Select winepulse.drv and change load order to 'disabled'. Now try to trigger your bug again, if it was a winepulse bug it shouldn't trigger any more. A2 (easier and preferred): From 1.5.3 onward, launch your program with WINENOPULSE=1 wine program.exe to temporarily disable winepulse for that program." reference: http://ubuntuforums.org/showthread.php?t=1960599

    Read the article

  • Why do I have man pages of commands that don't exist?

    - by Robert Vila
    What is panel-test-applets for?? I don't know. But if I want to know I type: $ whatis panel-test-applets The answer is: panel-test-applets (1) - display installed applets I have the man page too, and I can read it: $ man panel-test-applets But there is no program with that name. Maybe the command is not very useful, but is its man page more useful? Does someone know how to install that program or what is its man page for when you cannot execute the program? I can't even execute the command: $ panel-test-applets nor $ panel-test-applets --help which is the only thing its man page talks about!!

    Read the article

< Previous Page | 120 121 122 123 124 125 126 127 128 129 130 131  | Next Page >