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• C++, array declaration, templates, linker error

  - by justik

  There is a linker error in my SW. I am using the following structure based on h, hpp, cpp files. Some classes are templatized, some not, some have function templates. Declaration: test.h #ifndef TEST_H #define TEST_H class Test { public: template <typename T> void foo1(); void foo2 () }; #include "test.hpp" #endif Definition: test.hpp #ifndef TEST_HPP #define TEST_HPP template <typename T> void Test::foo1() {} inline void Test::foo2() {} //or in cpp file #endif CPP file: test.cpp #include "test.h" void Test::foo2() {} //or in hpp file as inline I have the following problem. The variable vars[] is declared in my h file test.h #ifndef TEST_H #define TEST_H char *vars[] = { "first", "second"...}; class Test { public: void foo(); }; #include "test.hpp" #endif and used as a local variable inside foo() method defined in hpp file as inline. test.hpp #ifndef TEST_HPP #define TEST_HPP inline void Test::foo() { char *var = vars[0]; //A Linker Error } #endif However, the following linker error occurs: Error 745 error LNK2005: "char * * vars" (?vars@@3PAPADA) already defined in test2.obj How and where to declare vars[] to avoid linker errors? After including #include "test.hpp" it is late to declare it...

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• static member specialization of templated child class and templated base class

  - by b3nj1

  I'm trying to have a templated class (here C) that inherits from another templated class (here A) and perform static member specialization (of int var here), but I cant get the right syntax to do so (if it's possible #include <iostream> template<typename derived> class A { public: static int var; }; //This one works fine class B :public A<B> { public: B() { std::cout << var << std::endl; } }; template<> int A<B>::var = 9; //This one doesn't works template<typename type> class C :public A<C<type> > { public: C() { std::cout << var << std::endl; } }; //template<> template<typename type> int A<C<type> >::a = 10; int main() { B b; C<int> c; return 0; } I put an example that works with a non templated class (here B) and i can get the static member specialization of var, but for C that just doesn't work. Here is what gcc tells me : test.cpp: In constructor ‘C<type>::C()’: test.cpp:29:26: error: ‘var’ was not declared in this scope test.cpp: At global scope: test.cpp:34:18: error: template definition of non-template ‘int A<C<type> >::a’ I'm using gcc version 4.6.3, thanks for any help

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• Strange overloading rules in C++

  - by bucels

  I'm trying to compile this code with GCC 4.5.0: #include <algorithm> #include <vector> template <typename T> void sort(T, T) {} int main() { std::vector<int> v; sort(v.begin(), v.end()); } But it doesn't seem to work: $ g++ -c nm.cpp nm.cpp: In function ‘int main()’: nm.cpp:9:28: error: call of overloaded ‘sort(std::vector<int>::iterator, std::vector<int>::iterator)’ is ambiguous nm.cpp:4:28: note: candidates are: void sort(T, T) [with T = __gnu_cxx::__normal_iterator<int*, std::vector<int> >] /usr/lib/gcc/i686-pc-linux-gnu/4.5.0/../../../../include/c++/4.5.0/bits/stl_algo.h:5199:69: note: void std::sort(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<int*, std::vector<int> >] Comeau compiles this code without errors. (4.3.10.1 Beta2, strict C++03, no C++0x) Is this valid C++?

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• C++: Maybe you know this pitfall?

  - by Martijn Courteaux

  Hi, I'm developing a game. I have a header GameSystem (just methods like the game loop, no class) with two variables: int mouseX and int mouseY. These are updated in my game loop. Now I want to access them from Game.cpp file (a class built by a header-file and the source-file). So, I #include "GameSystem.h" in Game.h. After doing this I get a lot of compile errors. When I remove the include he says of course: Game.cpp:33: error: ‘mouseX’ was not declared in this scope Game.cpp:34: error: ‘mouseY’ was not declared in this scope Where I want to access mouseX and mouseY. All my .h files have Header Guards, generated by Eclipse. I'm using SDL and if I remove the lines that wants to access the variables, everything compiles and run perfectly (*). I hope you can help me... This is the error-log when I #include "GameSystem.h" (All the code he is refering to works, like explained by the (*)): In file included from ../trunk/source/domein/Game.h:14, from ../trunk/source/domein/Game.cpp:8: ../trunk/source/domein/GameSystem.h:30: error: expected constructor, destructor, or type conversion before ‘*’ token ../trunk/source/domein/GameSystem.h:46: error: variable or field ‘InitGame’ declared void ../trunk/source/domein/GameSystem.h:46: error: ‘Game’ was not declared in this scope ../trunk/source/domein/GameSystem.h:46: error: ‘g’ was not declared in this scope ../trunk/source/domein/GameSystem.h:46: error: expected primary-expression before ‘char’ ../trunk/source/domein/GameSystem.h:46: error: expected primary-expression before ‘bool’ ../trunk/source/domein/FPS.h:46: warning: ‘void FPS_SleepMilliseconds(int)’ defined but not used This is the code which try to access the two variables: SDL_Rect pointer; pointer.x = mouseX; pointer.y = mouseY; pointer.w = 3; pointer.h = 3; SDL_FillRect(buffer, &pointer, 0xFF0000);

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• Static variable definition order in c++

  - by rafeeq

  Hi i have a class tools which has static variable std::vector m_tools. Can i insert the values into the static variable from Global scope of other classes defined in other files. Example: tools.h File class Tools { public: static std::vector<std::vector> m_tools; void print() { for(int i=0 i< m_tools.size() ; i++) std::cout<<"Tools initialized :"<< m_tools[i]; } } tools.cpp File std::vector<std::vector> Tools::m_tools; //Definition Using register class constructor for inserting the new string into static variable. class Register { public: Register(std::string str) { Tools::m_tools.pushback(str); } }; Different class which inserts the string to static variable in static variable first_tool.cpp //Global scope declare global register variable Register a("first_tool"); //////// second_tool.cpp //Global scope declare global register variable Register a("second_tool"); Main.cpp void main() { Tools abc; abc.print(); } Will this work? In the above example on only one string is getting inserted in to the static list. Problem look like "in Global scope it tries to insert the element before the definition is done" Please let me know is there any way to set the static definiton priority? Or is there any alternative way of doing the same.

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• Working for free?

  - by Jonny

  I came across this article Work for Free that got me thinking. The goal of every employer is to gain more value from workers than the firm pays out in wages; otherwise, there is no growth, no advance, and no advantage for the employer. Conversely, the goal of every employee should be to contribute more to the firm than he or she receives in wages, and thereby provide a solid rationale for receiving raises and advancement in the firm. I don't need to tell you that the refusenik didn't last long in this job. In contrast, here is a story from last week. My phone rang. It was the employment division of a major university. The man on the phone was inquiring about the performance of a person who did some site work on Mises.org last year. I was able to tell him about a remarkable young man who swung into action during a crisis, and how he worked three 19-hour days, three days in a row, how he learned new software with diligence, how he kept his cool, how he navigated his way with grace and expertise amidst some 80 different third-party plug-ins and databases, how he saw his way around the inevitable problems, how he assumed responsibility for the results, and much more. What I didn't tell the interviewer was that this person did all this without asking for any payment. Did that fact influence my report on his performance? I'm not entirely sure, but the interviewer probably sensed in my voice my sense of awe toward what this person had done for the Mises Institute. The interviewer told me that he had written down 15 different questions to ask me but that I had answered them all already in the course of my monologue, and that he was thrilled to hear all these specifics. The person was offered the job. He had done a very wise thing; he had earned a devotee for life. The harder the economic times, the more employers need to know what they are getting when they hire someone. The job applications pour in by the buckets, all padded with degrees and made to look as impressive as possible. It's all just paper. What matters today is what a person can do for a firm. The resume becomes pro forma but not decisive under these conditions. But for a former boss or manager to rave about you to a potential employer? That's worth everything. What do you think? Has anyone here worked for free? If so, has it benefited you in any way? Why should(nt) you work for free (presuming you have the money from other means to keep you going)? Can you share your experience? Me, I am taking a year out of college and haven't gotten a degree yet so that's probably why most of my job applications are getting ignored. So im thinking about working for free for the experience?

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• Windows phone 8.1 emulator not loading OS

  - by Anonymous Person

  I am trying to launch the emulator (Emulator 8.1 WVGA 4 inch 512 MB, or any other as a matter of fact) but it fails to launch. It goes to the "Loading OS" screen then throws an error box with the text "DEP6100". On VS, it says at the bottom Error1 Error : DEP6100 : The following unexpected error occurred during bootstrapping stage 'Connecting to the device': ObjectDisposedException - 0x80131622 and Error2 Error : DEP6100 : The following unexpected error occurred during bootstrapping stage 'Connecting to the device': ObjectDisposedException - 0x80131622 Looked in the internet but haven't found an answer yet. Can you please help? Please let me know what additional information you need.

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• Problem with cascade delete using Entity Framework and System.Data.SQLite

  - by jamone

  I have a SQLite DB that is set up so when I delete a Person the delete is cascaded. This works fine when I manually delete a Person (all records that reference the PersonID are deleted). But when I use Entity Framework to delete the Person I get an error: System.InvalidOperationException: The operation failed: The relationship could not be changed because one or more of the foreign-key properties is non-nullable. When a change is made to a relationship, the related foreign-key property is set to a null value. If the foreign-key does not support null values, a new relationship must be defined, the foreign-key property must be assigned another non-null value, or the unrelated object must be deleted. I don't understand why this is occurring. My trigger is set to clean up all related objects before deleting the object it was told to delete. When I go into the model editor and check the properties of the relationship it shows no action for the OnDelete property. Why isn't this set correctly by pulling it from the DB? If I change this value to Cascade everything works properly, but I would rather not rely on this manual change because what if I refresh my model from the DB and it looses that. Here's the relivent SQL for my tables. CREATE TABLE [SomeTable] ( [SomeTableID] INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, [PersonID] INTEGER NOT NULL REFERENCES [Person](PersonID) ON DELETE CASCADE ) CREATE TABLE [Person] ( [PersonID] INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT )

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• Problem deleting record using Entity Framework and System.Data.SQLite

  - by jamone

  I have a SQLite DB that is set up so when I delete a Person the delete is cascaded. This works fine when I manually delete a Person (all records that reference the PersonID are deleted). But when I use Entity Framework to delete the Person I get an error: System.InvalidOperationException: The operation failed: The relationship could not be changed because one or more of the foreign-key properties is non-nullable. When a change is made to a relationship, the related foreign-key property is set to a null value. If the foreign-key does not support null values, a new relationship must be defined, the foreign-key property must be assigned another non-null value, or the unrelated object must be deleted. I don't understand why this is occurring. My trigger is set to clean up all related objects before deleting the object it was told to delete. When I go into the model editor and check the properties of the relationship it shows no action for the OnDelete property. Why isn't this set correctly by pulling it from the DB? Here's the relivent SQL for my tables. CREATE TABLE [SomeTable] ( [SomeTableID] INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, [PersonID] INTEGER NOT NULL REFERENCES [Person](PersonID) ON DELETE CASCADE ) CREATE TABLE [Person] ( [PersonID] INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT )

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• C# - Pass by value & Pass by Reference

  - by Lijo

  Hi Team, Could you please explain the following behavior of C# Class. I expect the classResult as "Class Lijo"; but actual value is “Changed”. We’re making a copy of the reference. Though the copy is pointing to the same address, the method receiving the argument cannot change original. Still why the value gets changed ? public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Person p = new Person(); p.Name = "Class Lijo"; Utilityclass.TestMethod(p); string classResult = p.Name; Response.Write(classResult); } } public class Utilityclass { public static void TestMethod(Person k) { k.Name = "Changed"; } } public class Person { private string name; public string Name { get { return name; } set { name = value; } } } Thanks Lijo

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• Compare base class part of sub class instance to another base class instance

  - by Anders Abel

  I have number of DTO classes in a system. They are organized in an inheritance hierarchy. class Person { public int Id { get; set; } public string FirstName { get; set; } public string ListName { get; set; } } class PersonDetailed : Person { public string WorkPhone { get; set; } public string HomePhone { get; set; } public byte[] Image { get; set; } } The reason for splitting it up is to be able to get a list of people for e.g. search results, without having to drag the heavy image and phone numbers along. Then the full PersonDetail DTO is loaded when the details for one person is selected. The problem I have run into is comparing these when writing unit tests. Assume I have Person p1 = myService.GetAPerson(); PersonDetailed p2 = myService.GetAPersonDetailed(); // How do I compare the base class part of p2 to p1? Assert.AreEqual(p1, p2); The Assert above will fail, as p1 and p2 are different classes. Is it possible to somehow only compare the base class part of p2 to p1? Should I implement IEquatable<> on Person? Other suggestions?

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• SFML SetFramerateLimit Not Limiting Frame Rate

  - by Person

  Compiler: Visual C++ OS: Windows 7 Enterprise For some reason, Window::SetFramerateLimit isn't limiting the frame rate in the app I'm working on, but it works fine for others. The framerate is capped to 60, but mine jumps around at 100-99 and then goes down to 50 sometimes. It actually causes serious issues. For example, if I create many objects on screen, I'll see a heavy performance hit, whereas others report no change. Any ideas regarding why this is happening? If you need more information, I'd be happy to oblige. Thanks. P.S. I have strong reasons to believe that it is not simply a case of "their hardware is just more powerful than yours."

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• Fluent NHibernate join table mapping

  - by Rusty

  Reverse engineering an existing database to map with N-Hibernate using Fluent N-Hibernate. How can I map this? Address table Id Address1 Address2 Person table Id First Last Types Id TypeName PersonAddress table (A person can have home, business etc addresses) Id PersonId (Id from person table) AddressId (Id from address table) TypeId (Id from types lookup table HOME, BUSINESS etc..) Any help would be great. Thanks

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• solr JOIN query

  - by Sfairas

  I need to run a JOIN query on a solr index. I've got two xmls that I have indexed, person.xml and subject.xml. Person: <doc> <field name="id">P39126</field> <field name="family">Smith</field> <field name="given">John</field> <field name="subject">S1276</field> <field name="subject">S1312</field> </doc> Subject: <doc> <field name="id">S1276</field> <field name="topic">Abnormalities, Human</field> </doc> I need to only display information from the person doc but each query should match fields in both person and subject. In the case the query matches only the subject doc I need to display all docs from the person that have a matching id. Is this possible to do without running two seperate queries? Something like a JOIN query would do the job. Any help?

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• Seam conversation ending suddenly when using Redirect

  - by Markos Fragkakis

  Hi all, Because I get some errors on conversations ending abruptly, I created in my project some test pages that reproduce the issue. The navigation takes place between pageA.xhtml and pageB.xhtml. Please tell me if I am using something in the wrong way. My configuration: Seam 2.2.0.GA WebLogic 10.3.2 (11g) Richfaces 3.3.2 JSF 1.2 Note: the same happens when using annotations to begin / end conversations ======= PAGE A @Name("pageaAction") public class PageaAction { @Out(required = false, scope = ScopeType.CONVERSATION) Person person; public String rule3() { person = new Person(); person.setEmail("[email protected]"); person.setName("markos"); return "rule3"; } } <?xml version="1.0" encoding="UTF-8"?> <page> <navigation> <rule if-outcome="rule3"> <begin-conversation /> <redirect view-id="/pages/seam_sandbox/pageb.xhtml" /> </rule> </navigation> </page> ... <h:commandButton action="#{pageaAction.rule3()}" value="h:commandButton" /><br/> ... ======= PAGE B @Name("pagebAction") public class PagebAction { @In(required = false, scope = ScopeType.CONVERSATION) Person person; public String redirectA() { return "redirectA"; } } <?xml version="1.0" encoding="UTF-8"?> <page> <navigation> <rule if-outcome="redirectA"> <end-conversation before-redirect="true" /> <redirect view-id="/pages/seam_sandbox/pagea.xhtml" /> </rule> </navigation> </page> ... <h:commandButton action="#{pagebAction.redirectA()}" value="h:commandButton" /> ... ========== EXCEPTION: This happens after a random number of redirects. javax.faces.FacesException: {pagebAction.redirectA()}: java.lang.IllegalStateException: No conversation context active at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118) at javax.faces.component.UICommand.broadcast(UICommand.java:387) at org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:324) at org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:299) at org.ajax4jsf.component.AjaxViewRoot.processPhase(AjaxViewRoot.java:256) at org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:469) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:265) at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227) at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125) at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292) at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:530) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83) at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178) at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290) at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388) at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515) at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60) at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69) at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3592) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121) at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2202) at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2108) at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1432) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201) at weblogic.work.ExecuteThread.run(ExecuteThread.java:173) Caused by: javax.faces.el.EvaluationException: java.lang.IllegalStateException: No conversation context active at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) ... 45 more Caused by: java.lang.IllegalStateException: No conversation context active at org.jboss.seam.ScopeType.getContext(ScopeType.java:133) at org.jboss.seam.Component.getValueToInject(Component.java:2325) at org.jboss.seam.Component.injectAttributes(Component.java:1736) at org.jboss.seam.Component.inject(Component.java:1554) at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:61) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.core.ConversationInterceptor.aroundInvoke(ConversationInterceptor.java:65) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44) at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68) at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107) at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185) at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103) at eu.emea.pim.prs.web.seamsandbox.PagebAction_$$_javassist_seam_8.redirectA(PagebAction_$$_javassist_seam_8.java) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:335) at org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:280) at org.jboss.el.parser.AstMethodSuffix.getValue(AstMethodSuffix.java:59) at org.jboss.el.parser.AstMethodSuffix.invoke(AstMethodSuffix.java:65) at org.jboss.el.parser.AstValue.invoke(AstValue.java:96) at org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276) at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68) at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) ... 46 more

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• Algorithm - find the minimal time

  - by exTyn

  I've found this problem somewhere on the internet, but I'm not sure about the proper solution. I think, that it has to be done by greedy algorithm, however I haven't spend much time thinking about that. I suppose, You may enjoy solving this problem, and I will get my answer. Win-win situation :). Problem N people come to a river in the night. There is a narrow bridge, but it can only hold two people at a time. Because it's night, the torch has to be used when crossing the bridge. Every person can cross the bridge in some (given) time (person n1 can cross the bridge in t1 time, person n2 in t2 time etc.). When two people cross the bridge together, they must move at the slower person's pace. What is the mimimal time for the whole grup to cross the bridge?

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• Differing paths for lua script and app

  - by Person

  My problem is that I'm having trouble specifying paths for Lua to look in. For example, in my script I have a require("someScript") line that works perfectly (it is able to use functions from someScript when the script is run standalone. However, when I run my app, the script fails. I believe this is because Lua is looking in a location relative to the application rather than relative to the script. Hardcoding the entire path down to the drive isn't an option since people can download the game wherever they like so the highest I can go is the root folder for the game. We have XML files to load in information on objects. In them, when we specify the script the object uses, we only have to do something like Content\Core\Scripts\someScript.lua where Content is in the same directory as Debug and the app is located inside Debug. If I try putting that (the Content\Core...) in Lua's package.path I get errors when I try to run the script standalone. I'm really stuck, and am not sure how to solve this. Any help is appreciated. Thanks. P.S. When I print out the default package.path in the app I see syntax like ;.\?.lua in a sequence like... ;.\?.lua;c:...(long file path)\Debug\?.lua; I assume the ; means the end of the path, but I have no idea what the .\?.lua means. Any Lua file in the directory?

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• C# DataGridViewComboBoxCell setting value manually, value not valid

  - by Jay

  Hi, here is my code: private class Person { private string myName; private int myValue; public Person(string name, int value) { myName = name; myValue = value; } public override string ToString() { return myName; } public string Name { get { return myName; } set { myName = value; } } public int Value { get { return myValue; } set { myValue = value; } } } I use it to fill a DataGridViewComboBoxCell like this: myDataGridViewComboBoxCell.ValueMember = "Value"; myDataGridViewComboBoxCell.DisplayMember = "Name"; myDataGridViewComboBoxCell.Items.Add(new Person("blabla", someNumber)); all I want to do now is to select a person: myDataGridViewComboBoxCell.Value = someNumber; but keep getting "value is not valid"-error. Any Idea why? When I select an Item in my program I can see the right Value (someNumber) so Display and ValueMember are set correctly...

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• Pseudocode: a clear definition?

  - by Cian E

  The following code is an example of what I think would qualify as pseudocode, since it does not execute in any language but the logic is correct. string checkRubric(gpa, major) bool brake = false num lastRange num rangeCounter string assignment = "unassigned" array bus['business']= array('person a'=>array(0, 2.9), 'person b'=>array(3, 4)) array cis['computer science']= array('person c'=>array(0, 2.9), 'person d'=>array(3, 4)) array lib['english']= array('person e'=>array(0, 4)) array rubric = array(bus, cis, lib) foreach (rubric as fieldAr) foreach (fieldAr as field => advisorAr) if (major == field) foreach (advisorAr as advisor => gpaRangeAr) rangeCounter = 0 foreach (gpaRangeAr as gpaValue) if (rangeCounter < 1) lastRange = gpaValue else if (gpa >= lastRange && gpa <= gpaValue) assignment = advisor brake = true break endif rangeCounter++ endforeach if (brake == true) break endif endforeach if (brake == true) break endif endif endforeach if (brake == true) break endif endforeach return assignment For the past couple of weeks I've been trying to create a clear definition of what pseudocode actually is. Is it relative to the programmer or is there an actual clearcut syntax? I say pseudocode is any code that does not execute, how about you? Thanks (links to this subject welcome)

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• AutoMapper a viable alternative to two way databinding using a FormView?

  - by tbone

  I've started using the FormView control to enable two way databinding in asp.net webforms. I liked that it saved me the trouble of writing loadForm and unloadForm routines on every page. So it seemed to work nicely at the start when I was just using textboxes everywhere....but when it came time to start converting some to DropDownLists, all hell broke lose. For example, see: http://stackoverflow.com/questions/2435185/not-possible-to-load-dropdownlist-on-formview-from-code-behind ....and I had many additional problems after that. So I happened upon an article on AutoMapper, which I know very little about yet, but from the sounds of it, this might be a viable alternative to two-way databinding a form to an domain entity object? From what I understand, AutoMapper basically operates on naming convention, so, it will look for matched names properties(?) on the source and destination objects. So, basically, I have all my domain entities (ie: Person) with properties (FirstName, LastName, Address, etc)....what I would like to be able to do is declare my asp controls with those exact same names, and have automapper do the loading and unloading. One obvious caveat is that AutoMapper would have to know the proper property name for each control type, ie: Person.FirstName -- form.FirstName*.Text* Person.Country -- form.Country.SelectedValue Person.IsVerified -- form.IsVerified.Checked ....so it would have to have the smarts to find the control on the form, determine its type, and then load/unload between the domain object and the webform control into the proper property of the control. So if this worked, a person could just get rid of the cursed FormView control entirely, and it would be just one line of code each for binding and unbinding a webform. Possible?

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• .NET Fingerprint SDK

  - by Kishore A

  I am looking for a comparison of Fingerprint reader SDKs available for .NET (we are using .Net 3.5). My requirements are 1. Associate more than one fingerprint with a person. 2. Store the fingerprints it self. (So I do not have to change the Database for my program.) 3. Work in both event and no-event mode. (Event Mode: Give notification if someone swipes a finger on the reader; No-Event mode: I activate the reader in synchronous mode). 4. Should provide API for either confirming a user or Identifying a user. (Confirm API: I send the person's ID/unique number and it confirms that it is the same person; Identifying API: The sdk sends the person's ID after it looks up the person using the fingerprint) I would also like to get a comparison of Fingerprint readers if anybody knows of one available on the internet. Hope I was clear. Thanks, Kishore.

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• WPF UserControl weird binding problem

  - by Heko

  Hello! Im usign a Ribbon Window and in the "content area beneath" I have a grid in which I will be displaying UserControls. To demonstrate my problem lets take a look at this simple UserControl: <ListView x:Name="lvPersonList"> <ListView.View> <GridView> <GridViewColumn Width="120" Header="Name" DisplayMemberBinding="{Binding Name}"/> <GridViewColumn Width="120" Header="Height" DisplayMemberBinding="{Binding Height}"/> </GridView> </ListView.View> </ListView> And the code: public partial class MyUserControl: UserControl { private List<Person> personList; public TestSnpList() { InitializeComponent(); this.personList = new List<Person>(); this.personList.Add(new Person { Name = "Chuck Norris", Height = 210 }); this.personList.Add(new Person { Name = "John Rambo", Height = 200 }); this.lvPersonList.ItemsSource = personList; } } public class Person { public string Name { get; set; } public int Height { get; set; } } The parent Window: <Grid x:Name="grdContent" DockPanel.Dock="Top"> <controls:MyUserControl x:Name="myUserControl" Visibility="Visible"/> </Grid> I don't understant why this binding doesn't work. Instead of values (Name and Height) I get full class names. If I use this code in a Window it works fine. Any ideas? I would like this user contorl works for itself (it gets the data form the DB and represents it in a ListView)... Thanks!

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• java httpclient post

  - by Eric V

  Hi, I have a question about how to allow my jsp page to issue a post command to the server, and still have the browser fallow the re direction of the posted page. Here are the code snipets: code that does the post (this is inside a jsp file): HttpClient client = new DefaultHttpClient(); client.getParams().setParameter("SUBMITTED", "submitted"); client.getParams().setParameter("xxxxxxxx", purchaser.getemail()); client.getParams().setParameter("xxxxxxxx", purchaser.getsuject()); HttpPost method = new HttpPost(url+"process.jsp"); client.execute(method); here is a snipet of process.jsp if (person.getStatus() == person.ACTIVE) response.sendRedirect("Account.jsp); else if (person.getStatus() == person.ERROR) response.sendRedirect("Error.jsp); I would like the browser to the fallow/goto the redirect from the process.jsp. Does anyone know a tutorial that would help me or Am I going about this the wrong way. Thanks, eric

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• WPF - Binding problem

  - by Erez

  Why after clicking the button the text in the textblock doesn't change ? XAML: <Grid> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> <TextBlock Text="{Binding Name}"/> <Button Click="Button_Click" Grid.Row="1" Margin="20">Click Me</Button> </Grid> Code behind: public partial class Window1 : Window, INotifyPropertyChanged { private Person _myPerson; public Person MyPerson { get { return _myPerson; } set { _myPerson = value; if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs("MyPerson")); } } } public Window1() { MyPerson = new Person { Name = "A" }; DataContext = MyPerson; InitializeComponent(); } private void Button_Click(object sender, RoutedEventArgs e) { MyPerson = new Person { Name = "B" }; } #region INotifyPropertyChanged Members public event PropertyChangedEventHandler PropertyChanged; #endregion }

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• Exactly what is a "third party"? (And who are the first and second party?)

  - by aioobe

  I know precisely what a "third-party library" is, so I assume that the "third-party" in this case, simply is an arbitrary person/company other than the developer? Has it to do with "first person" / "second person" etc perhaps? The fact that there is a "third party" suggests that there is a "first party" and a "second party" as well. Are those terms well defined? (I'm not a native english speaker.)

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