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  • Implementing toString on Java enums

    - by devoured elysium
    Hello It seems to be possible in Java to write something like this: private enum TrafficLight { RED, GREEN; public String toString() { return //what should I return here if I want to return //"abc" when red and "def" when green? } } Now, I'd like to know if it possible to returnin the toString method "abc" when the enum's value is red and "def" when it's green. Also, is it possible to do like in C#, where you can do this?: private enum TrafficLight { RED = 0, GREEN = 15 ... } I've tried this but it but I'm getting compiler errors with it. Thanks

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  • How Should I Print Documentation from Google Code?

    - by peter.newhook
    Google does a decent job of documenting their API (like Closure http://code.google.com/closure/compiler/docs/overview.html) but I find it hard to read because it's broken into such short pages. I like to leaf through my docs and read it on paper. Has anyone found a good way to print from the documentation on Google Code. It could be a PDF, or even just a long page with lots of content. Please note, I'm not talking about the Wikis in the Open Source side of Google Code. I'm referring to the API docs published by Google.

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  • Clearing "may not respond" warnings for UIView and UIViewController

    - by user284681
    In an iPad app, I'm using a custom subclass of UIView with UIViewController. Here's the view header: @interface pdfView : UIView { CGPDFDocumentRef doc; } -(void)setDoc:(CGPDFDocumentRef)newDoc; @end And here's the controller header: @interface iPadPDFTestViewController : UIViewController { CGPDFDocumentRef doc; } - (void)loadPDF; @end Part of the controller implementation: - (void)viewDidLoad { [super viewDidLoad]; [self loadPDF]; [self.view setDoc:doc]; } In Interface Builder, I've set the view object to use the class pdfView. At compilation, [self.view setDoc:doc]; gives the warning "'UIView' may not respond to '--setDoc'." I'm guessing that this warning appears because the compiler thinks it's looking at UIView (which does not implement the setDoc method) instead of pdfView. But why does it think that? And how can I tell it what class it's really looking at, so as to clear the warning?

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  • How Can I Check an Object to See its Type and Return A Casted Object

    - by Russ Bradberry
    I have method to which I pass an object. In this method I check it's type and depending on the type I do something with it and return a Long. I have tried every which way I can think of to do this and I always get several compiler errors telling me it expects a certain object but gets another. Can someone please explain to me what I am doing wrong and guide me in the right direction? What I have tried thus far is below: override def getInteger(obj:Object) = { if (obj.isInstanceOf[Object]) null else if (obj.isInstanceOf[Number]) (obj:Number).longValue() else if (obj.isInstanceOf[Boolean]) if (obj:Boolean) 1 else 0 else if (obj.isInstanceOf[String]) if ((obj:String).length == 0 | (obj:String) == "null") null else try { Long.parse(obj:String) } catch { case e: Exception => throw new ValueConverterException("value \"" + obj.toString() + "\" of type " + obj.getClass().getName() + " is not convertible to Long") } }

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  • ASP.NET membership spaces in username

    - by SaphuA
    Hi, We just came across a weird bug in our application that uses the asp.net membership. The administrator had created some users with spaces behind their name: 'My Username ' In the Users table this is saved normally, so without the spaces: 'My Username' The user can also login using the name without the spaces: 'My Username' When we use User.Identity.Name in our applicatie the result is the username WITH the spaces: 'My Username '. Where do these spaces come from? They aren't stored in the Users table so where does he get this from?! Thanks!

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  • How to create a custom ADO Multi Dimensional Catalog with no database

    - by Alan Clark
    Does anyone know of an example of how to dynamically define and build ADO MD (ActiveX Data Objects Multidimensional) catalogs and cube definitions with a set of data other than a database? Background: we have a huge amount of data in our application that we export to a database and then query using the usual SQL joins, groups, sums etc to produce reports. The data in the application is originally in objects and arrays. The problem is the amount of data is so large the export can take 2 hours. So I am trying to figure out a good way of querying the objects in memory, either by a custom OLAP algorithm or library, or ADO MD. But I haven't been able to find an example of using ADO MD without a database behind it. We are using Delphi 2010 so would use ADO ActiveX but I imagine the ADO.NET MD is similar. I realize that if the application data was already stored in a database the problem would solve itself. Also if Delphi had LINQ capability I could query the objects and arrays that way.

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  • How to set up Flex Unit 4

    - by macke
    Does anyone know of any guides or any sort of documentation on how to set up the new Flex Builder 4 beta? I've been pulling my hair all day long, none of my tests are executed and I can't for the life of me understand what's wrong. There are no errors at all. It's as if the metadata tags are not recognized, is there some special compiler argument to recognize them? I seem to remember that this is not necessary as long as the swc files that are included were compiled with said arguments. I'm using Beta 1 of Flex Unit 4 which can be found here: http://opensource.adobe.com/wiki/display/flexunit/FlexUnit+4+feature+overview I'm actually using the very same code that is included with that package to run the tests, but no tests are executed. Neither mine nor the ones included in the FU4 package. The lack of documentation certainly doesn't help much...

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  • ASP.NET - How to add a label to a RadioButtonList ListItem?

    - by EWizard
    I have a RadioButtonList with two ListItems included: <asp:RadioButtonList runat="server" ID="optRollover" OnSelectedIndexChanged="RolloverOptionSelected" AutoPostBack="true"> <asp:ListItem Value="0">100% </asp:ListItem> <asp:ListItem Value="1">Less than 100%</asp:ListItem> </asp:RadioButtonList><br /> On the first ListItem I need to have a label that displays some text from the code behind of the page. Logically it seems to me like I would be able to do something like this: 100% Obviously this does not work because I am getting an error: The 'Text' property of 'asp:ListItem' does not allow child objects. Can anyone think of a way around this constraint?

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  • How to programmatically determine name of CKEditor instance

    - by ChrisA
    I've added a CKEditor instance programmatically to my page in the code-behind of my ASP.NET page: VB.NET: itemEditor = New CkEditor cell.Controls.Add(itemEditor) ... which works fine. I can get the HTML on the postback and do stuff with it. However, I also want to do some client-side stuff with it, specifically take a selected item out of another control, and insert it into the text by handling the onchange event. So, how can I get the name of the editor instance in the JavaScript, so that I can do stuff like: function GetCkText() { var htmlFromEditor = CKEDITOR.instances['editorName'].getData(); // do stuff with htmlFromEditor }

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  • avr-gcc Atmel AVR microncontrollers on Linux / Windows Arduino IDE

    - by Prakash
    I recently heard all about avr-gcc and avr-lib support on Linux that can be used for developing code for Atmel AVR micro-controller (ATmega48/88/168, ATmega16/32). I also understand that Arduino also uses Atmel's AVR micro-controller (I am not sure which one). Now different vendors have designed their own product (using Atmel AVR uc) where code is to be developed using avr-gcc i.e. on Linux platform. In the same regards Arduino's Windows IDE is much simpler and easy to code with. I am confused as to which platform is more promising - what are the benefits of learning avr-gcc? Which is the better option to program using the same? What type of application can we develop using avr-gcc compiler?

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  • Create a string with the result of an expression and the expression that originated the value. Is it

    - by Oscar Reyes
    Like String r = SomeThing.toExecString("new Object().toString()"); And when executed the value of r would be: "new Object().toString() = java.lang.Object@c5e3974" Is this even possible at all? Would it need a bunch of reflection? A built in compiler maybe? AFAIK, this is not possible with regular Java. The closest thing I could get is IDE support like in IDEA with the "macro" soutv+tab that prints: Hit taband type the expression The IDE types the rest for you. But that's quite another completely thing.

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  • Good "Modelling & Simulation" book recommendations for programmers?

    - by Harry
    I'm a programmer, and have completely forgotten all the advanced engineering Math I studied ~20 years ago at school. I now have an urgent need to learn about Modelling and Simulation. Though the present context is Disease Modelling, I'm not sure if there's such a thing as 'general' modelling and simulation... with concepts / techniques / algorithms that could be used in just about any domain (and not just limited to biology, finance, trade, economic, weather, etc.) Would you have any recommendations that are easy to read by a semi-Math-literate programmer? Basically, I cannot afford to drown myself in too much Math and theory behind M & S, hence this post. Tia...

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  • Handling missing resources

    - by Domchi
    I've just found myself in situation where I needed to handle exception I'll probably never get, so out of curiosity, let's do a small poll. Do you validate the presence of resources in your programs? I mean, those resources which are installed with your program, like icons, images and similar. Generally, if those are missing, either your install didn't do its job, or the user randomly deleted files in your app. If you do validate the presence, what do you do when the files are not there? Of course, for web apps, you'll have nice 404 page or broken link, but what about the rest? Fail early, yes, but leave handling failures to your compiler, or what?

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  • Better type safety in Java collections

    - by Paul Tomblin
    In my java coding, I often end up with several Map<String,Map<String,foo>> or Map<String,List<String>> and then I have trouble remembering which String is which key. I comment the declaration with //Map<capabiltyId,Map<groupId,foo>> or //Map<groupId,List<capabilityId>, but it's not the greatest solution. If String wasn't final, I would make new classes CapabilityId extends String and GroupId extends String, but I can't. Is there a better way to keep track of which thing is the key and maybe have the compiler enforce it?

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  • Tuple struct constructor complains about private fields

    - by Grubermensch
    I am working on a basic shell interpreter to familiarize myself with Rust. While working on the table for storing suspended jobs in the shell, I have gotten stuck at the following compiler error message: tsh.rs:8:18: 8:31 error: cannot invoke tuple struct constructor with private fields tsh.rs:8 let mut jobs = job::JobsList(vec![]); ^~~~~~~~~~~~~ It's unclear to me what is being seen as private here. As you can see below, both of the structs are tagged with pub in my module file. So, what's the secret sauce? tsh.rs use std::io; mod job; fn main() { // Initialize jobs list let mut jobs = job::JobsList(vec![]); loop { /*** Shell runtime loop ***/ } } job.rs use std::fmt; pub struct Job { jid: int, pid: int, cmd: String } impl fmt::Show for Job { /*** Formatter ***/ } pub struct JobsList(Vec<Job>); impl fmt::Show for JobsList { /*** Formatter ***/ }

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  • Ambiguous reference when getter/setter have different visibilities

    - by Warren Seine
    The following code raises an ambiguous reference to value at compile time: import flash.display.Sprite; public class Main extends Sprite { private var _value : Number = 0.; public function get value() : Number { return _value; } private function set value(v : Number) : void { _value = v; } public function Main() : void { value = 42.; } } I suspect some kind of bug in the compiler, though I didn't actually read the ECMA standard. Before someone asks those questions: Private setters do make sense. The ambiguity also exists with custom namespaces (which is the problem I'm facing).

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  • HTMLEditor's content not see <br/>

    - by Ivan90
    Hi, I'm using an editor control of ajaxcontroltoolkit. <cc1:Editor ID="EditNews" runat="server" NoUnicode="true" Height="500px" Width="98%"/> My problem is that when I try to get the content of Editor by: Literal1.Text = EditNews.Content; if in the editor there are breakLine for example "If I write" Text Text Text Text In Literal I get: Text Text Text Text Whitout breakLine. I don't know if this problem depends by an attribute that I haven't set in Editor or I have to control this "" in Code Behind. Thanks for help

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  • mingw32-make : "Input line too long" issue

    - by hjsblogger
    We have a Makefile which runs on a Windows 2003 machine and we are using mingw32-make for it. Since the Makefile has many include paths, it exceeds the buffer size of 8K that the cmd can handle [Ref - http://support.microsoft.com/kb/830473/EN-US/due to which the compilation results in "input line too long" issue. I wanted to know the following - What would be the best way to optimize the Makefile as I have already removed unwanted compiler switches, include paths etc. Is there any way we can put all the INCLUDE paths in one .txt file and import it in the Makefile.I could not find any mingw32 documentation for the same. Any other inputs/hints/reference links are most welcome. Thanks, -HJSblogger

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  • how to send a dynamic set of parameters to webmethod using jquery ajax method?

    - by kranthi
    hi, I am using jquery ajax method on my aspx page,which will invoke the webmethod in the code behind.Currently the webmethod takes a couple of parameters like firstname,lastname,address etc which I am passing from jquery ajax method using data:JSON.stringify({fname:firstname,lname:lastname,city:city}) now my requirement has been changed such that,the number and type of parameters that are going to be passed is not fixed for ex.parameter combination can be something like fname,city or fname,city or city,lname or fname,lname,city or something else.So the webmethod should be such that it should accept any number parameters.I thought of using arrays to do so, as described here. But I do not understand how can I identify which and how many parameters have been passed to the webmethod to insert/update the data to the DB.Please could someone help me with this? thanks

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  • Web Standards alternatives to Flex/Silverlight (I mean serious alternatives, not just JS framewoks)

    - by user252160
    Is there a set of open standards technologies that I can use to achieve the same way of development as in Flex and Sivlerlight? I am talking about componentization, separation of concerns, rich graphics, states and effects . Please point out some tutorials and other resources if possible. P.S. I KNOW that this is technically possible, so please do not respond by sending google search results or general JQuery tutorials. I've seen those already. I need to know how a Flex / Silverlight developer could design and implement an application in roughly the same way (imagine a rich HTML tag set, much like XAML/MXML, behind which stands JavaScript responsible for handling events and business logic. Think also about binding)

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  • Persisting a trie to a file - C

    - by Appu
    I have a trie which I am using to do some string processing. I have a simple compiler which generates trie from some data. Once generated, my trie won't change at run time. I am looking for an approach where I can persist the trie in a file and load it effectively. I have looked at sqllite to understand how they are persisting b-treebut their file format looks bit advanced and I may not need all of those. It'd be helpful if someone can provide some ideas to persist and read the trie. I am programming using C.

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  • Updating PDB files without rebuilding.

    - by amit
    Hi All, Is there a way to update the PDB file with the new source location ? I have a project which links to some libraries which are built on another machine and are debug build with the PDB file. I cannot put a breakpoint in the files which are compiled in the libs. These libs take more than 4 hours to build so I dont want to buid them on my machine. Is there a way where i can make the compiler use the new source paths. I am using VS 2005 pro c++. Thanks Amit

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  • Passing complex objects to javascript via IScriptControl

    - by Jeff Dege
    I'm playing around with a asp.net page that's using the IScriptControl interface to pass data from the code-behind to the custom javascript object running on the browser. I'm passing a number of properties via IScriptControl.GetScriptDescriptors(), and they're all working fine, except for one. That one is a class derived from System.Collections.Generic.Dictionary<. And even that one has been working for me, so long as the elements in the collection were scalars - ints, doubles, and strings. But when I tried to pass a member of a class, it showed up as a null object in the javascript. The class in question is marked [Serializable]. I changed it to a struct, and got the same behavior. It looks as if the serializer used in IScriptControl does a shallow copy. I need a deep copy. Any ideas?

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  • How reliable is HTTP compression using gzip?

    - by Liam
    YSlow has suggested that I use HTTP compression to improve the performance of my site. However, as noted by Yahoo that are some problems. There are known issues with browsers and proxies that may cause a mismatch in what the browser expects and what it receives with regard to compressed content. Fortunately, these edge cases are dwindling as the use of older browsers drops off. The Apache modules help out by adding appropriate Vary response headers automatically. I understand that the most common problem occurs with IE6 behind a proxy. But how common are these problems today? To quantify it, roughly what percentage of web users experience bugs with HTTP compression?

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  • Finding the second highest number in array

    - by Richard Jackson
    I'm having difficulty to understand the logic behind the method to find the second highest number in array. The method used is to find the highest in the array but less than the previous highest (which has already been found). The thing that I still can't figure it out is why || highest_score == second_highest is necessary. For example I input three numbers: 98, 56, 3. Without it, both highest and second highest would be 98. Please explain. int second highest = score[0]; if (score[i] > second_highest && score[i] < highest_score || highest_score == second_highest) second_highest = score[i];

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