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• markdown to HTML with customised WMD editor

  - by spirytus

  For my application I customized slightly the way WMD behaves so when user enters empty lines, these are reflected in HTML output as <br />'s. Now I came to a point when I should store it somewhere at backend and so after going thru SO posts for a while I'm not sure what is the best way to do it. I have few options and if you could point out which their pros/cons that would be much appreciated. send to server and store as markdown rather than HTML. To me obvious advantage would be keeping exactly same formatting as user originally entered. But then how can I convert it back to HTML for display to a client? It seems very troublesome to convert it on client side as even if it would be possible what would happen if JS would be disabled? If I wanted to do it on the server, then standard server side implementations of markup to HTML might be resource expensive. Would that be an issue in your opinion? Even if it wouldn't be the case then as I mentioned my WMD implementation is customised and those server side solutions wouldn't probably do the right conversion to markdown anyway and there always would be a risk that something would convert wrong. Send to server as converted HTML. Same as above.. conversion on client side would be difficult, server side same with possibility of getting it wrong. send original markdown and converted HTML and store both. No performance issues related to converting markdown to HTML on client side, nor on server side. Users would have always same markdown they originally entered and same HTML they originally saw in preview (possibly sanitized in php though). It would have to take twice that much storage space though and that is my biggest worry. I tend to lean towards 3rd solution as it seems simplest, but there is a worry of doubled storage space needed for this solution. Please bear in mind that my implementation of WMD is slightly modified and also I'm going with PHP/MySql server side implementation. So apart from 3 options I listed above, are there any other possible solutions to my problem? Did I miss anything important that would make one of the options above better then the rest? And what other pros/cons would apply to each solution I listed? Also how is it implemented on SO? I read somwhere that they using option 3, and so if its good enough for SO would be good enough for me :) but not sure if its true anyway, so how is it done? Also please forgive me, but at least for once I got to say that StackOverflow IS THE BEST DAMN RESOURCE ON THE WEB and I truly appreciate all the people trying to help others here! The site and users here are simply amazing!

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• Wordpress: Not able to retrieve css for new plugin in admin mode

  - by Steven

  I'm creating a new plugin which will have it's own css file. The css file resides in the root folder of the plugin. In the plugin section of the admin interface, I have added a few text fields fields. But the CSS is not applied. I'm adding the CSS file using this code: // Register styling add_action('admin_init', 'event_styles'); function event_styles() { wp_register_style('event_cal', plugins_url('eventcall.css',__FILE__)); wp_enqueue_style('event_cal'); } The following code gives me the CSS path: echo plugins_url('eventcall.css',__FILE__); and outputs http://mysite.com/wp-content/plugins/wp-eventcal/eventcall.css If I try to enter this URL directly in the browser, it only shows me the front page. And if I look in the source code using Firebug, where the link to the CSS should be, I only find the entire HTML code for the front page. Am I using wrong code to use backend in admin interface? In my HOST file, I have added ``

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• iPhone memory management

  - by Prazi

  I am newbie to iPhone programming. I am not using Interface Builder in my programming. I have some doubt about memory management, @property topics in iPhone. Consider the following code @interface LoadFlag : UIViewController { UIImage *flag; UIImageView *preview; } @property (nonatomic, retain) UIImageView *preview; @property (nonatomic, retain) UIImage *flag; @implementation @synthesize preview; @synthesize flag; - (void)viewDidLoad { flag = [UIImage imageNamed:@"myImage.png"]]; NSLog(@"Preview: %d\n",[preview retainCount]); //Count: 0 but shouldn't it be 1 as I am retaining it in @property in interface file preview=[[UIImageView alloc]init]; NSLog(@"Count: %d\n",[preview retainCount]); //Count: 1 preview.frame=CGRectMake(0.0f, 0.0f, 100.0f, 100.0f); preview.image = flag; [self.view addSubview:preview]; NSLog(@"Count: %d\n",[preview retainCount]); //Count: 2 [preview release]; NSLog(@"Count: %d\n",[preview retainCount]); //Count: 1 } When & Why(what is the need) do I have to set @property with retain (in above case for UIImage & UIImageView) ? I saw this statement in many sample programs but didn't understood the need of it. When I declare @property (nonatomic, retain) UIImageView *preview; statement the retain Count is 0. Why doesn't it increase by 1 inspite of retaining it in @property. Also when I declare [self.view addSubview:preview]; then retain Count increments by 1 again. In this case does the "Autorelease pool" releases for us later or we have to take care of releasing it. I am not sure but I think that the Autorelease should handle it as we didn't explicitly retained it so why should we worry of releasing it. Now, after the [preview release]; statement my count is 1. Now I don't need UIImageView anymore in my program so when and where should I release it so that the count becomes 0 and the memory gets deallocated. Again, I am not sure but I think that the Autorelease should handle it as we didn't explicitly retained it so why should we worry of releasing it. What will happen if I release it in -(void) dealloc method In the statement - flag = [UIImage imageNamed:@"myImage.png"]]; I haven't allocated any memory to flag but how can I still use it in my program. In this case if I do not allocate memory then who allocates & deallocates memory to it or is the "flag" just a reference pointing to - [UIImage imageNamed:@"myImage.png"]];. If it is a reference only then do i need to release it. Thanks in advance.

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• how to get ipv6 public address on xp machine ?

  - by SR Dusad

  C:netsh netshinterface ipv6 netsh interface ipv6show addres Querying active state... Interface 6: Local Area Connection 3 Addr Type DAD State Valid Life Pref. Life Address Temporary Preferred 6d23h38m55s 23h36m8s 2001:db8:1dde:1:6d16:9d1:b1ec:2245 Public Preferred 29d23h59m30s 6d23h59m30s 2001:db8:1dde:1:201:2ff:fe29:23b6 Link Preferred infinite infinite fe80::201:2ff:fe29:23b6 The books says, after IPv6 is enabled on XP, auto configure will give it 3 addresses, a Link, a Public, and a Temporary one. But on my computer, I could only see Link, what was the problem? I used the XP machine. But when i try it on windows 2007 .it works fine and show me a public address. - How to get public ipv6 address from xp machine ? - on my xp machine ipv6 is enabled but when i use command tracert6 www.kame.net it shows No route to destination. Why Any type of help willl appreciated..

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• How to mock WCF Web Services with Rhino Mocks.

  - by Will

  How do I test a class that utilizes proxy clients generated by a Web Service Reference? I would like to mock the client, but the generated client interface doesn't contain the close method, which is required to properly terminate the proxy. If I don't use the interface, but instead a concrete reference, I get access to the close method but loose the ability to mock the proxy. I'm trying to test a class similar to this: public class ServiceAdapter : IServiceAdapter, IDisposable { // ILoggingServiceClient is generated via a Web Service reference private readonly ILoggingServiceClient _loggingServiceClient; public ServiceAdapter() : this(new LoggingServiceClient()) {} internal ServiceAdapter(ILoggingServiceClient loggingServiceClient) { _loggingServiceClient = loggingServiceClient; } public void LogSomething(string msg) { _loggingServiceClient.LogSomething(msg); } public void Dispose() { // this doesn't compile, because ILoggingServiceClient doesn't contain Close(), // yet Close is required to properly terminate the WCF client _loggingServiceClient.Close(); } }

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• AJAX XML reply node value iteration

  - by XpiritO

  Hi there, guys. I would really appreciate to get your help on this, as I can't seem to detect and solve the problem I'm having with an AJAX functionality on a site that I'm currently developing. I have a webform that makes an asynchronous call to a handler (.ashx) that delivers a XML response that is later processed by a Javascript client-side function that places it's contents into the user-interface. I'm attaching an example of the response generated by my handler, and what I would like to know is how can I get all the <body> element innerHTML (with the text and child nodes) contents to append it to a <span> element on the user-interface. Can anyone help me out with this? XML Response returned by the handler (checked via Firebug): <message> <content> <messageId>2</messageId> <from>Barack Obama</from> <fromMail>[email protected]</fromMail> <subject>Yes, we can... get World Peace</subject> <body>Hello, dear citizen. I'm sending you this message to invite you to join us! <a href="http://www.whitehouse.gov">Test link</a> Thank you for your time.</body> </content> </message> Client-side Javascript function to affect the user-interface innerHTML property with the data returned via AJAX: function GetMessageContentsCallback(args, resp) { //XML Parser try { //Internet Explorer xmlDoc = new ActiveXObject("Microsoft.XMLDOM"); xmlDoc.async = "false"; xmlDoc.loadXML(resp); } catch (e) { parser = new DOMParser(); xmlDoc = parser.parseFromString(resp, "text/xml"); } var msgReply = xmlDoc.getElementsByTagName('message')[0]; var ajaxRespondeBodyInnerHTML = msgReply.getElementsByTagName(body)[0].firstChild.nodeValue; //this currently only delivers inner text content, without the <a href... bit and subsequent text document.getElementById("bodySpan").innerHTML = ajaxRespondeBodyInnerHTML; }

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• Generic Type constraint in .net

  - by Jose

  Okay I'm looking for some input, I'm pretty sure this is not currently supported in .NET 3.5 but here goes. I want to require a generic type passed into my class to have a constructor like this: new(IDictionary<string,object>) so the class would look like this public MyClass<T> where T : new(IDictionary<string,object>) { T CreateObject(IDictionary<string,object> values) { return new T(values); } } But the compiler doesn't support this, it doesn't really know what I'm asking. Some of you might ask, why do you want to do this? Well I'm working on a pet project of an ORM so I get values from the DB and then create the object and load the values. I thought it would be cleaner to allow the object just create itself with the values I give it. As far as I can tell I have two options: 1) Use reflection(which I'm trying to avoid) to grab the PropertyInfo[] array and then use that to load the values. 2) require T to support an interface like so: public interface ILoadValues { void LoadValues(IDictionary values); } and then do this public MyClass<T> where T:new(),ILoadValues { T CreateObject(IDictionary<string,object> values) { T obj = new T(); obj.LoadValues(values); return obj; } } The problem I have with the interface I guess is philosophical, I don't really want to expose a public method for people to load the values. Using the constructor the idea was that if I had an object like this namespace DataSource.Data { public class User { protected internal User(IDictionary<string,object> values) { //Initialize } } } As long as the MyClass<T> was in the same assembly the constructor would be available. I personally think that the Type constraint in my opinion should ask (Do I have access to this constructor? I do, great!) Anyways any input is welcome.

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• What are the pros/cons to these 2 ways of defining parameters for a web service method

  - by Antony Scott

  I have an existing web service I need to expand, but it has not gone into production yet. So, I am free to change the contracts as I see fit. But I am not sure of the best way to define the methods. I am leaning towards Method 2 for no other reason than I cannot think of good names to give the parameters classes! Are there any major disadvantages to using Method 2 over Method 1? Method 1 [DataContract(Namespace = Constants.ServiceNamespace)] public class MyParameters { [DataMember(Order = 1, IsRequired = true)] public int CompanyID { get; set; } [DataMember(Order = 2, IsRequired = true)] public string Filter { get; set; } } [ServiceContract(Namespace = Constants.ServiceNamespace)] public interface IMyService { [OperationContract, FaultContract(MyServiceFault)] MyResult MyMethod(MyParameters params); } Method 2 public interface IMyService { [OperationContract, FaultContract(MyServiceFault)] MyResult MyMethod(int companyID, string filter); }

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• An appropriate C API for inspecting attribute values

  - by uk82

  There are two obvious ways in C to provide outside access to internal attribute values (A) provide a generic interface that accepts a list of attributes that changes over time (some added / some die) or (B) a specific interface for each and every attribute. Example A: int x_get_attribute_value(ATT att) { if (a) return a_val; if (b) return b_val; } Example B: A_Enum x_get_a_type_attribute() {} B_Enum x_get_b_type_attribute() {} I recall that Eclipse's API is very much like A (I could be wrong). What I can't do is come up with a compelling argument against either. A is clean - any user will no where to go to find out a property value. It can evolve cleanly without leaving dead interfaces around. B has type checking to a degree - this is C enums! Is there a big hitter argument that pushes the balance away from opinion?

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• Scroll Gestures not Passed to IScrollInfo implementing panel in Windows Phone 7 CTP

  - by user50088

  I am using a custom panel as a ItemsPanel for a ItemsControl in a with a custom template that provides for a scroll viewer. (See Xaml below.) So long as my panel does not implement IScrollInfo, scrolling works in this scenerio. I implement IScrollInfo and update my viewport and extent sizes in measure override. The scroll bar shows the correct relative size, and if I call the IScrollInfo methods directly, scrolling works as expected. However, the drag and flick gestures no longer scroll the content. Putting a breakpoint on the input of every IScrollInfo method shows that drag and pick are not calling the interface. Removing the IScrollInfo interface declaration restores the scroll on drag and flick behavior. Is there a simple way to restore the flick and pan gestures to ItemControls with panels that implement IScrollInfo?

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• Are we using IoC effectively?

  - by Juliet

  So my company uses Castle Windsor IoC container, but in a way that feels "off": All the data types are registered in code, not the config file. All data types are hard-coded to use one interface implementation. In fact, for nearly all given interfaces, there is and will only ever be one implementation. All registered data types have a default constructor, so Windsor doesn't instantiate an object graph for any registered types. The people who designed the system insist the IoC container makes the system better. We have 1200+ public classes, so its a big system, the kind where you'd expect to find a framework like Windsor. But I'm still skeptical. Is my company using IoC effectively? Is there an advantage to new'ing objects with Windsor than new'ing objects with the new keyword?

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• 3-Tier architecture-layering and the term-mishmash

  - by Rookian

  Hi! I am confused about the different possibilities to express a 3-Tier architecture. Data-Access-Layer Business-Layer Presentation Layer (User Interface) or Database (aka Backend) Business-Layer Presentation Layer (User Interface) Why can you skip the database in the 1st approach? Both use a database! Does the database belong to the layering or not?! What is wrong and what is right? Can someone of you clarify this :)? Thanks in advance!

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• Calculate the contentsize of scrollview

  - by neha

  Hi all, I'm having a scrollview as the detailedview of tableview cell. There are multiple views on the detailedview like labels, buttons etc. which I'm creating through interface builder. What I'm creating through interface builder is static. I'm putting everything on a view of height 480. A label on my detailedview is having dynamic text which can extend to any length. The problem is that I need to set the scrollview's content size for which I need its height. How shall I set scrollview's height provided the content is dynamic?

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• What is your favorite way to read XML files?

  - by stacker

  Let's take this xml structure as example: <?xml version="1.0" encoding="utf-8"?> <Configuration-content> <XFile Name="file name 1" /> <XFile Name="name2" /> <XFile Name="name3" /> <XFile Name="name4" /> </Configuration-content> C# interface to implement: public class Configuration { public XFile[] Files { get; set; } } public interface IConfigurationRipository { Configuration Get(); void Save(Configuration entity); } I wonder what's the best way to do that. The task is to implement IConfigurationRipository using your favorite approach.

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• Custom SessionListener, name is not bound in this context, javax.naming.NameNotFoundException

  - by mehmet6parmak

  Hi, I am trying to implement HttpSessionListener so that users of this listener can register implementation of ISessionEvent interface to session Events.code is below: public class MySessionListener implements HttpSessionListener{ @Resource ISessionEvent sessionEvent; public ISessionEvent getSessionEvent() { return sessionEvent; } public void setSessionEvent(ISessionEvent sessionEvent) { this.sessionEvent = sessionEvent; } @Override public void sessionCreated(HttpSessionEvent arg0) { sessionEvent.SessionCreated(arg0.getSession()); } @Override public void sessionDestroyed(HttpSessionEvent arg0) { sessionEvent.SessionDestroyed(arg0.getSession()); } } When user implement ISessionEvent and add as a bean, SessionCreated and SessionDestroyed functions of implementation will be called when these events occured. You can ask why dont you just write inside listeners methods, i dont i'm just trying. When i try the code above i got the following error message: javax.naming.NameNotFoundException: Name com.mehmet6parmak.sessionlistener.MySessionListener is not bound in this Context at org.apache.naming.NamingContext.lookup(NamingContext.java:770) at org.apache.naming.NamingContext.lookup(NamingContext.java:153) at org.apache.catalina.util.DefaultAnnotationProcessor.lookupFieldResource(DefaultAnnotationProcessor.java:278) at org.apache.catalina.util.DefaultAnnotationProcessor.processAnnotations(DefaultAnnotationProcessor.java:187) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4082) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardHost.start(StandardHost.java:785) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445) at org.apache.catalina.core.StandardService.start(StandardService.java:519) at org.apache.catalina.core.StandardServer.start(StandardServer.java:710) at org.apache.catalina.startup.Catalina.start(Catalina.java:581) 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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) Resource annotation causes the error but i could not resolve it. Thanks All... Interface and Implementation @Resource public interface ISessionEvent { public void SessionCreated(HttpSession session); public void SessionDestroyed(HttpSession session); } @Resource public class SessionEvent implements ISessionEvent { @Override public void SessionDestroyed(HttpSession session) { System.out.println("From Session Event Callback(Destroy):" + session.getId()); } @Override public void SessionCreated(HttpSession session) { System.out.println("From Session Event Callback(Create):" + session.getId()); } } Bean Definition <context:annotation-config/> <context:component-scan base-package="com.mehmet6parmak"> </context:component-scan> <bean id="sessionEvent" autowire="byName" class="com.mehmet6parmak.sessionlistener.SessionEvent"></bean> Solution:Using the method used in link works.

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• How to let the matcher to match the second invocation on mock?

  - by Alex Luya

  I have an interface like this public interface EventBus{ public void fireEvent(GwtEvent<?> event); } and test code(testng method) looks like this: @Test public void testFireEvent(){ EventBus mock=mock(EventBus.class); //when both Event1 and Event2 are subclasses of GwtEvent<?> mock.fireEvent(new Event1()); mock.fireEvent(new Event2()); //then verify(mock).fireEvent(argThat(new Event2Matcher())); } Event2Matcher looks like this: private class Event2Matcher extends ArgumentMatcher<Event2> { @Override public boolean matches(Object arg) { return ((Event2) arg).getSth==sth; } } But get an error indicating that: Event1 can't be cast to Event2 And obviously,the matcher matched the first invoking mock.fireEvent(new Event1()); So,the statement within matcher return ((Event2) arg).getSth==sth; Will throw out this exception.So the question is how to let verify(mock).fireEvent(argThat(new Event2Matcher())); to match the second invoking?

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• textbox, combobox in WPF listview.

  - by RAJ K

  hello everyone, I am porting an application from foxpro to C#.Net. This is a wine shop billing software. Its billing interface screenshot link is here http://picasaweb.google.com/raj.kishor09/RAJK?feat=directlink But my client wants similar interface on WPF too. I think listview can help me in this regard but don't know how to implement. i figured out that each row of listview should have 2 textbox, 1 combobox and few textblock or label. Not only this but cursor should jump from one control to other control using "Enter/Return" key instead of "Tab" key. Please help me with some code lines. Please guys help me......

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• Java Best Practice for type resolution at runtime.

  - by Brian

  I'm trying to define a class (or set of classes which implement the same interface) that will behave as a loosely typed object (like JavaScript). They can hold any sort of data and operations on them depend on the underlying type. I have it working in three different ways but none seem ideal. These test versions only allow strings and integers and the only operation is add. Adding integers results in the sum of the integer values, adding strings concatenates the strings and adding an integer to a string converts the integer to a string and concatenates it with the string. The final version will have more types (Doubles, Arrays, JavaScript-like objects where new properties can be added dynamically) and more operations. Way 1: public interface DynObject1 { @Override public String toString(); public DynObject1 add(DynObject1 d); public DynObject1 addTo(DynInteger1 d); public DynObject1 addTo(DynString1 d); } public class DynInteger1 implements DynObject1 { private int value; public DynInteger1(int v) { value = v; } @Override public String toString() { return Integer.toString(value); } public DynObject1 add(DynObject1 d) { return d.addTo(this); } public DynObject1 addTo(DynInteger1 d) { return new DynInteger1(d.value + value); } public DynObject1 addTo(DynString1 d) { return new DynString1(d.toString()+Integer.toString(value)); } } ...and similar for DynString1 Way 2: public interface DynObject2 { @Override public String toString(); public DynObject2 add(DynObject2 d); } public class DynInteger2 implements DynObject2 { private int value; public DynInteger2(int v) { value = v; } @Override public String toString() { return Integer.toString(value); } public DynObject2 add(DynObject2 d) { Class c = d.getClass(); if(c==DynInteger2.class) { return new DynInteger2(value + ((DynInteger2)d).value); } else { return new DynString2(toString() + d.toString()); } } } ...and similar for DynString2 Way 3: public class DynObject3 { private enum ObjectType { Integer, String }; Object value; ObjectType type; public DynObject3(Integer v) { value = v; type = ObjectType.Integer; } public DynObject3(String v) { value = v; type = ObjectType.String; } @Override public String toString() { return value.toString(); } public DynObject3 add(DynObject3 d) { if(type==ObjectType.Integer && d.type==ObjectType.Integer) { return new DynObject3(Integer.valueOf(((Integer)value).intValue()+((Integer)value).intValue())); } else { return new DynObject3(value.toString()+d.value.toString()); } } } With the if-else logic I could use value.getClass()==Integer.class instead of storing the type but with more types I'd change this to use a switch statement and Java doesn't allow switch to use Classes. Anyway... My question is what is the best way to go about something thike this?

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• What's the C strategy to "imitate" a C++ template ?

  - by Andrei Ciobanu

  After reading some examples on stackoverflow, and following some of the answers for my previous questions (1), I've eventually come with a "strategy" for this. I've come to this: 1) Have a declare section in the .h file. Here I will define the data-structure, and the accesing interface. Eg.: /** * LIST DECLARATION. (DOUBLE LINKED LIST) */ #define NM_TEMPLATE_DECLARE_LIST(type) \ typedef struct nm_list_elem_##type##_s { \ type data; \ struct nm_list_elem_##type##_s *next; \ struct nm_list_elem_##type##_s *prev; \ } nm_list_elem_##type ; \ typedef struct nm_list_##type##_s { \ unsigned int size; \ nm_list_elem_##type *head; \ nm_list_elem_##type *tail; \ int (*cmp)(const type e1, const type e2); \ } nm_list_##type ; \ \ nm_list_##type *nm_list_new_##type##_(int (*cmp)(const type e1, \ const type e2)); \ \ (...other functions ...) 2) Wrap the functions in the interface inside MACROS: /** * LIST INTERFACE */ #define nm_list(type) \ nm_list_##type #define nm_list_elem(type) \ nm_list_elem_##type #define nm_list_new(type,cmp) \ nm_list_new_##type##_(cmp) #define nm_list_delete(type, list, dst) \ nm_list_delete_##type##_(list, dst) #define nm_list_ins_next(type,list, elem, data) \ nm_list_ins_next_##type##_(list, elem, data) (...others...) 3) Implement the functions: /** * LIST FUNCTION DEFINITIONS */ #define NM_TEMPLATE_DEFINE_LIST(type) \ nm_list_##type *nm_list_new_##type##_(int (*cmp)(const type e1, \ const type e2)) \ {\ nm_list_##type *list = NULL; \ list = nm_alloc(sizeof(*list)); \ list->size = 0; \ list->head = NULL; \ list->tail = NULL; \ list->cmp = cmp; \ }\ void nm_list_delete_##type##_(nm_list_##type *list, \ void (*destructor)(nm_list_elem_##type elem)) \ { \ type data; \ while(nm_list_size(list)){ \ data = nm_list_rem_##type(list, tail); \ if(destructor){ \ destructor(data); \ } \ } \ nm_free(list); \ } \ (...others...) In order to use those constructs, I have to create two files (let's call them templates.c and templates.h) . In templates.h I will have to NM_TEMPLATE_DECLARE_LIST(int), NM_TEMPLATE_DECLARE_LIST(double) , while in templates.c I will need to NM_TEMPLATE_DEFINE_LIST(int) , NM_TEMPLATE_DEFINE_LIST(double) , in order to have the code behind a list of ints, doubles and so on, generated. By following this strategy I will have to keep all my "template" declarations in two files, and in the same time, I will need to include templates.h whenever I need the data structures. It's a very "centralized" solution. Do you know other strategy in order to "imitate" (at some point) templates in C++ ? Do you know a way to improve this strategy, in order to keep things in more decentralized manner, so that I won't need the two files: templates.c and templates.h ?

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• Animating UIImageView iPhone

  - by Fred Dpn

  Hi, i'm having trouble about animating an Image in a UIImageView. I've created an image view in interface builder and linked it to its iboutlet. Here is my code. @interface Game : UIViewController <UIAccelerometerDelegate>{ IBOutlet UIImageView *diying; } @property (nonatomic, retain) UIImageView *diying; In the viewDidLoad method i've written this code NSArray * imageArray = [[NSArray alloc] initWithObjects: [UIImage imageNamed:@"Die1.gif"], [UIImage imageNamed:@"Die2.gif"], [UIImage imageNamed:@"Die3.gif"], [UIImage imageNamed:@"Die4.gif"], nil]; diying.animationImages = imageArray; diying.animationDuration = 1.1; diying.contentMode = UIViewContentModeBottomLeft; [diying startAnimating]; [super viewDidLoad]; which is a adaptation of what i've found here : http://icodeblog.com/2009/07/24/iphone-programming-tutorial-animating-a-game-sprite/ NB : those .gif files are simple images and are not animated. I did the tutorial and it worked fine but i can't figure out why it my adaptation doesn't work !

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• Is it okay to pass injected EntityManagers to EJB bean's helper classes and use it?

  - by Zwei steinen

  We have some JavaEE5 stateless EJB bean that passes the injected EntityManager to its helpers. Is this safe? It has worked well until now, but I found out some Oracle document that states its implementation of EntityManager is thread-safe. Now I wonder whether the reason we did not have issues until now, was only because the implementation we were using happened to be thread-safe (we use Oracle). @Stateless class SomeBean { @PersistenceContext private EntityManager em; private SomeHelper helper; @PostConstruct public void init(){ helper = new SomeHelper(em); } @Override public void business(){ helper.doSomethingWithEm(); } } Actually it makes sense.. If EntityManager is thread-unsafe, a container would have to do inercept business() this.em = newEntityManager(); business(); which will not propagate to its helper classes. If so, what is the best practice in this kind of a situation? Passing EntityManagerFactory instead of EntityManager?

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• c# Generic overloaded method dispatching ambiguous

  - by sebgod

  Hello, I just hit a situation where a method dispatch was ambiguous and wondered if anyone could explain on what basis the compiler (.NET 4.0.30319) chooses what overload to call interface IfaceA { } interface IfaceB<T> { void Add(IfaceA a); T Add(T t); } class ConcreteA : IfaceA { } class abstract BaseClassB<T> : IfaceB<T> { public virtual T Add(T t) { ... } public virtual void Add(IfaceA a) { ... } } class ConcreteB : BaseClassB<IfaceA> { // does not override one of the relevant methods } void code() { var concreteB = new ConcreteB(); // it will call void Add(IfaceA a) concreteB.Add(new ConcreteA()); } In any case, why does the compiler not warn me or even why does it compile? Thank you very much for any answers.

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• Java vs c++ types

  - by folone

  I've recently had a question about coledatetime java implementation, and Chris said, that the problem might lay in type conversions: cpp-float vs java-float (Or maybe cpp-date vs java-date. Not types, but..). Now I have several questions on this: Is there a table of comparison for java vs c++ types? If type conversions is the problem, in my situation (I have a db with OLEDate records, already created with some c++ program. I need to read and write to that db, so that the OLEDate field compatibility remained: my java code reads proper dates, and c++ program is not affected with what the java program wrote to the db.), what would you do: Use COleDateTime to retrieve the date with JNI? Create your own implementation at all costs (using broader types, or anything else)? Is there anything, I'm missing here?

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• What's the best software analogy you've heard?

  - by Mantorok

  Hi Quite frequently I have to explain things to Project Managers who sometimes want to know a little bit more about something, and sometimes I try and come up with some analogy that best explains it. Now, I can't really kick this off with a good analagy because mine usually suck, but I would be interested in yours, or some you've heard that have been used to simplify explanations. One analogy that does come up often is when explaining Interfaces (i.e. .Net) to which I usually explain in terms of a vehicle has a driver interface, and all vehicles must implement that interface so that anyone who can drive a vehicle will be able to utilise it. Any more? Would like to hear some, both serious and humourous. Please close if a duplicate.

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• Need help with developing a class for my JUnit test

  - by alpdog14

  I have this JUnit test that I need help developing a Interface and Class for, here is the test: Box b1 = new DefaultBox( "abc" ); Box b2 = new DefaultBox( "def" ); Box b3 = new DefaultBox( "" ); assertEquals("abc", b1.contents()); assertEquals("[abc]", b1.toString()); assertTrue(b1.equals(b1)); assertFalse(b1.equals(b2)); assertFalse(b1.equals(null)); assertEquals("cba", b1.flip().contents()); assertEquals("", b3.flip().contents()); can anyone help me in developing a Default box class and a box interface to make these test pass? Any help would be most appreciated.

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