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  • Java Compiler - Load Method

    - by Brian
    So I have been working on a java project where the goal is to create a virtual computer. So I am basically done but with one problem. I have created a compiler which translates a txt document with assembly code in it and my compiler has created a new-file with this code written as machine executable ints. But now I need to write a load method that reads these ints and runs the program but I am having difficulty doing this. Any help is much appreciated....also this is not homework if you are thinking this. The project was simply to make a compiler and now I am trying to complete it for my own interest. Thanks. Here is what I have so far for load: public void load(String filename) { FileInputStream fs = new FileInputStream(filename); DataInputStream dos = new DataInputStream(fs); dos.readInt();

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  • Constraining enum value in method parameter

    - by fearofawhackplanet
    enum Fruit { Banana, Orange, Strawberry ... ... // etc, very long enum } PeelFruit(Fruit.Orange); PeelFruit(Fruit.Banana); PeelFruit(Fruit.Strawberry); // huh? can't peel strawberries! Sorry for the lame example, but hopefully you get the idea. Is there a way to constrain the enum values that PeelFruit will accept? Obvisouly I could check them in the method with a switch or something, but it would be cool if there was a way to do it that is a) a bit more compact, and b) would cause a compile time error, not a run time error. [Fruit = Orange,Bannana] void PeelFruit(Fruit fruit) { ... }

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  • readobject method throws ClassNotFoundException

    - by eruina
    Hi all, I'm trying to pick up Java and wanted to test around with Java's client/server to make the client send a simple object of a self defined class(Message) over to the server. The problem was that I kept getting a ClassNotFoundException on the server side. I think the rest of the codes seem to be alright because other objects such as String can go through without problems. I had two different netbeans projects in different locations for client and server each. Each of them have their own copy of Message class under their respective packages. Message class implements Serializable. On the client side, I attempt to send a Message object through. On the server side, upon calling the readObject method, it seems to be finding Message class from the client's package instead of it's own. printStackTrace showed: "java.lang.ClassNotFoundException: client.Message" on the server side I have not even tried to cast or store the object received yet. Is there something I left out?

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  • Prefered method for looping sound flash as3

    - by Brian Heylin
    Hi there, I'm having some issues with looping a sound in flash AS3, in that when I tell the sound to loop I get a slight delay at the end/beginning of the audio. The audio is clipped correctly and will play without a gap on garage band. I know that there are issues with sound in general in flash, bugs with encodings and the inaccuracies with the SOUND_COMPLETE event (And Adobe should be embarrassed with their handling of these issues) I have tried to use the built in loop argument in the play method on the Sound class and also react on the SOUND_COMPLETE event, but both cause a delay. But has anyone come up with a technique for looping a sound without any noticeable gap?

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  • JQuery and WCF - GET Method passes null

    - by user70192
    Hello, I have a WCF service that accepts requests from JQuery. Currently, I can access this service. However, the parameter value is always null. Here is my WCF Service definition: [OperationContract] [WebInvoke(Method = "GET", BodyStyle = WebMessageBodyStyle.WrappedRequest, RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)] public string ExecuteQuery(string query) { // NOTE: I get here, but the query parameter is always null string results = Engine.ExecuteQuery(query); return results; } Here is my JQuery call: var searchUrl = "/services/myService.svc/ExecuteQuery"; var json = { "query": eval("\"test query\"") }; alert(json2string(json)); // Everything is correct here if (json != null) { $.ajax({ type: "GET", url: searchUrl, contentType: "application/json; charset=utf-8", data: json2string(json), dataType: "json" }); } What am I doing wrong? It seems odd that I can call the service but the parameter is always null. Thank you

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  • Getting two variables in the URL with htaccess

    - by Wayne
    What way it is to be to get two GET methods in the URL by htaccess? RewriteRule ^adm/(.*)$ adm.php?mode=$1 I've used that for the example URL: http://www.domain.com/adm/thismode Now I want to get two methods like: http://www.domain.com/adm/thismode/othermode I've tried this: RewriteRule ^adm/(.*)$/(.*)$ adm.php?mode=$1&othermode=$2 But doesn't seem to work... how do I get it to do that? EDIT: $mode1 = $_GET['mode']; $mode2 = $_GET['othermode']; Like this...

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  • C# extension method doesn't seem to exist

    - by blahblah
    I can't seem to get the following extension method to be found in another class in the same namespace (MyProject.Util). using System.Collections.Specialized; namespace MyProject.Util { public static class Extensions { public static string Get( this NameValueCollection me, string key, string def ) { return me[key] ?? def; } } } As you can see it's basically another version of foo[bar] ?? baz, but I still don't understand why VS2008 fails to compile telling me that no version of Get takes two arguments. Any ideas?

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  • PHP: prevent invocation of method X from from context != Y

    - by sunwukung
    This is a tricky one. I am "emulating" ZF Bootstrapping (surface appearance). Don't ask me why, call it academic interest. So I have a Bootstrap Abstract with a method "run" that iterates over itself to locate any methods prefixed with "init". The application looks for a user defined class which extends this class, in which the user can define any number of methods in this way. However, I want to prevent the user from being able to execute the "run" command of it's parent class, while still exposing the same command for the client code. Anyone got any thoughts/advice/guidance? regards SWK

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  • Most Efficient Alternative Method of Storing Settings for iPhone Apps

    - by JPK
    I am not using the Settings bundle to store the settings for my app, as I prefer to allow the user to access the settings within the app (they may be changed fairly often). I do realize that there is the option to do both, but for now, I am trying to find the most optimal place to store the settings within the app. I have a good number of settings (from what I have read, probably too many for NSUserDefaults), and the two main options I am considering are: 1) storing the settings in a dictionary in the plist, loading the settings into a NSDictionary property in the app delegate and accessing them via the sharedDelegate 2) storing the settings in a Core Data entity (1 row on Settings entity), loading the settings into a Settings object in the app delegate and accessing them via the sharedDelegate Of these two, which would be the optimal method, performance wise?

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  • Intermittent asp.net mvc exception: “A public action method ABC could not be found on controller XYZ

    - by Chris Schoon
    Hi, I'm getting an intermittent exception saying that asp.net mvc can’t find the action method. Here’s the exception: A public action method 'Fill' could not be found on controller 'Schoon.Form.Web.Controllers.ChrisController'. I think I have the routing set up correctly because this application works most of the time. Here is the controller’s action method. [ActionName("Fill")] [AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post), UserIdFilter, DTOFilter] public ActionResult Fill(int userId, int subscriberId, DisplayMode? mode) { //… } The route: routes.MapRoute( "SchoonForm", "Form/Fill/{subscriberId}", new { controller = "ChrisController", action = "Fill" }, new { subscriberId = @"\d+" } ); And here is the stack: System.Web.HttpException: A public action method 'Fill' could not be found on controller 'Schoon.Form.Web.Controllers.ChrisController'. at System.Web.Mvc.Controller.HandleUnknownAction(String actionName) in C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\Controller.cs:line 197 at System.Web.Mvc.Controller.ExecuteCore() in C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\Controller.cs:line 164 at System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) in C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\ControllerBase.cs:line 76 at System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) in C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\ControllerBase.cs:line 87 at System.Web.Mvc.MvcHandler.ProcessRequest(HttpContextBase httpContext) in C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\MvcHandler.cs:line 80 at System.Web.Mvc.MvcHandler.ProcessRequest(HttpContext httpContext) in C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\MvcHandler.cs:line 68 at System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext httpContext) in C:\dev\ThirdParty\MvcDev\src\SystemWebMvc\Mvc\MvcHandler.cs:line 104 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) Here is an example of my filters they all work the same way: public class UserIdFilter : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { const string Key = "userId"; if (filterContext.ActionParameters.ContainsKey(Key)) { filterContext.ActionParameters[Key] = // get the user id from session or cookie } base.OnActionExecuting(filterContext); } } Thanks, Chris

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  • Call the method of base Class which was over ridden

    - by Abhijith Venkata
    I have illustrated my question in this example class Car { public void start(){ System.out.println("Car Started!!!"); } } class Mercedes extends Car { public void start(){ System.out.println("Mercedes Started!!!"); } } Now, in my main program, I write Mercedes m = new Mercedes(); m.start(); It prints: Mercedes Started!!! How do I call the start() method of Car class using the same object so that the output can be Car Started!!!. Edit: Actually It was asked in an interview I attended. I gave the super keyword answer. But the interviewer denied it. He said he'd give me a hint and said Virtual Function. I have no idea how to use that hint.

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  • What is the best Java numerical method package?

    - by Bob Cross
    I am looking for a Java-based numerical method package that provides functionality including: Solving systems of equations using different numerical analysis algorithms. Matrix methods (e.g., inversion). Spline approximations. Probability distributions and statistical methods. In this case, "best" is defined as a package with a mature and usable API, solid performance and numerical accuracy. Edit: derick van brought up a good point in that cost is a factor. I am heavily biased in favor of free packages but others may have a different emphasis.

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  • Build custom error messages in model files (example: using the 'pluralize' method)

    - by user502052
    I am using Ruby on Rails 3.0.7 and I would like to use the pluralize method in a my model file in order to properly build custom error messages. For example, I would like to do something like the following: NAME_MIN_LENGHT = 2 # Is 2 but I plan to change that (maybe dynamically... if it is possible) in future development validates :name, :length => { :minimum => NAME_MIN_LENGHT, :too_short => "is too short (minimum is #{pluralize(NAME_MIN_LENGHT, "character")})", }, How can I do that? Is it advisable? Why?

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  • Watin ContainsText method fails to find text in FireFox

    - by alonp
    The ContainsText method finds the text only in specific area in the html but fails to find id in other parts of the page. The text that located under 'div id="content"' can be found But the text in other area of the html is not found (f.e 'form id="aspnetForm"') Browser b = new FireFox("http://localhost:8668/login.aspx"); b.Button("login.login.button")).Click(); bool blah = b.ContainsText("Hello"); I'm using the latest watin release. The issue is reproduced with FF3.0, FF3.5 and FF3.6 In IE it's working fine for the tested text.

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  • Where is the CleanUp method?

    - by Apocatastasis
    Hi. I'm working fine with Subsonic 3 and the templates until november 2009. Now I'm geting the source directly from Git, but the ActiveRecord template doesn't generates correctly anymore. In the line 334 of the ActiveRecord template for SQLite: return from items in repo.GetAll() where items.<#=CleanUp(fk.OtherColumn)#> == <#=CleanUp(fk.ThisColumn)#> Error: The name 'CleanUp' doesn't exist in the current context But I can't find the CleanUp method in the Subsonic.Core project. Someone knows something about this?

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  • How to get surrounding method in Java source file for a given line number

    - by roesslerj
    I have a line number of a Java source file and want to get the sourounding method for that line number programatically. I looked into ANTLR which didn't help me much. Janino (http://www.janino.net) seems promising, I would scan and parse (and if necessary compile) the code. Then I could use JDI and ReferenceType.locationsOfLine(int lineNumber) Still I don't know how to use JDI for doing this and didn't find a tutorial that goes anywhere in this direction. Maybe there is some other way that I am completely missing.

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  • ruby in 100 minutes good_morning method issue

    - by user2525947
    I have been doing the Ruby in 100 minutes on the JumpStart labs website, and encountered a problem during part 5. I was asked to create a good_morning method that would print out a greeting such as 'Happy Monday, it's the 130 day of 2013'. Here is my current program: class PersonalChef def good_morning today = Date.today.strftime("%A") day_of_year = Date.today.yday puts "Happy#{today}! It is the #{day_of_year} day of year." return self end def make_toast(color) puts " Making your toast #{color}!" return self end def make_milkshake(flavor) puts " Making a #{flavor} milkshake!" return self end def make_eggs(quantity) puts " Making you #{quantity} eggs!" return self end end when I try to run the program load on irb( 'personal_chef.rb', frank = PersonalChef.new, frank.make_milkshake('chocolate'), etc, everything works fine until I try to type frank.good_morning into irb, which gives the following error message: NameError: uninitialized constant PersonalChef :: Date from personal_chef.rb:5: in good_morning from (irb):3 from /bin/irb:12:in '' Any help or information to help me solve this issue would be greatly appreciated. Thanks for your time!

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  • Display array values from web service method

    - by chupinette
    Hello all! I'm new to web services and im actually trying to learn how to develop one in C#. I have the following method in my web service which actually displays an array of int when i test it. [WebMethod] public int[] FindID(string str1,string str2) { Customer obj = new Customer(); obj.FindMatch(str1,str2); return obj.customer_id; } Now in my web application in which i have a button, the code is as below: Dim obj As localhost.Service = New localhost.Service Dim str1 As String = Session("str1") Dim str2 As String = Session("str2") Response.Write(obj.FindID(str1, str2)) The problem is that only the first value from the array is being displayed. Can anyone please help me to solve this problem?

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  • javascript. is it posible for one member of an object to access another member of that object withou

    - by joox
    For example: var myObj={ myValue="hola", asMember=function(){ alert( this.myValue ); } }; myObj.asMember(); // will work fine var asGlobal=myObj.asMember; // global alias for that member function asGlobal(); // won't work in javascript (will work in AS3, but i need js now) So the question is, can I rewrite asMember so that it could be called by global alias and without mentioning myObj at all? It's understood that if I define it: asMember=function(){ alert( myObj.myValue ); } it will work, but in my case, mentioning myObj is not acceptable even inside the function itself (because myObj may be reassigned later, but asGlobal won't change and should keep working)

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  • Is the JavaScript RegExp implicit method deprecated?

    - by Eric
    So everyone knows what I mean by "implicit methods"? They're like those default properties from the Windows COM days of yore, where you could type something like val = obj(arguments) and it would be interpreted as val = obj.defaultMethod(arguments) I just found out JavaScript has the same thing: the default method of a RegExp object appears to be 'exec', as in /(\w{4})/('yip jump man')[1] ==> jump This even works when the RegExp object is assigned to a variable, and even when it's created with the RegExp constructor, instead of /.../, which is good news to us fans of referential transparency. Where is this documented, and/or is it deprecated?

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  • Getting progress status out of a class library method

    - by Richard
    This app that I am doing uses a class library (if I dare call it that) to do the bulk of the work: 2 main methods in there (DoWork and UndoWork) use the other classes to achieve thier goal. Now that that works, I want to get out of the Console test enviroment and do a GUI. How would I get the status of say, the DoWork() method to update a progress bar? Should I multilate the class library (which currently works with the Console and Windows.Forms) to update? The problem with that is that I would surely have to make the class library use Window.Forms which will mess up the console testing apps (And there are lots of them - I tested all the way through, and then all together). Could you suggest some ideas, or places I can read up about ideas (the whole point of writing this this program is to learn, afer all)? Oh, by the way, suggestions like "foresight" or "planning" probably won't help here...(now, anywyay!) - But certainly will in future projects!

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  • WCF Service method syncronous/async

    - by Rafal
    Hi I have a problem withi calling WCF Service methods vs Silverlight 3. ` private bool usr_OK = false; clientService.CheckUserMailAsync(this.mailTF.Text); if (usr_OK == true) { isValidationOK = true; } else { isValidationOK = false; MessageBox.Show("User already exists.", "User registered succes!", MessageBoxButton.OK); } ` CheckUserMail should change usr_OK parameter. However it runs in other thread and it does not change the usr_OK param before IF block begins. I've tried thread.join byt the application freezed and i do not know what to do else. Please help me...how can i wait for WCF method to return param usr_OK.

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  • Java - SwingWorker - problem in done() method

    - by Yatendra Goel
    I am using javax.swing.SwingWorker for the first time. I want to update a JLabel from the interim result published by the swing worker as follows: publish("Published String"); Now to update the JLabel, I have coded the following: process(List<String> chunks) { if (chunks.size() > 0) { String text = chunks.get(chunks.size() - 1); label.setText(text); } } The above code works but my problem(or to be more specific, my doubt) is as follows: The above swing worker task is an annonymous inner class so it can access label field. But what if I want to make the swing worker class a non-inner class. Should I need to pass label as an argument to the constructor of swing worker class so that the process() method can access. Or Is there any other way? What approach does other developer follow to update UI components from the swing worker class' result when the swing worker class is not an inner class?

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  • When exactly does a method have side effects?

    - by Kim
    As I always understood it, any change to the programs state (or anything to do with IO) is a side effect. It does not matter, whether the change occurs in a global variable or in a private field of the object the method is called on. It follows that all methods which do not return anything either do nothing at all or have a side effect. My confusion comes from one of our university's instructors (who is still a student and thus not omniscient yet;) ) telling me setters don't have side effects.

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  • How to set RequestBody for Http Delete method.

    - by Tushar Tarkas
    I am writing a client code for a server which Delete API. The API specification requires data to be sent. I am using HttpComponents v3.1 library for writing client code. Using the HtpDelete class I could not find a way to add request data to it. Is there a way to do so ? Below is the code snippet. HttpDelete deleteReq = new HttpDelete(uriBuilder.toString()); List<NameValuePair> postParams = new ArrayList<NameValuePair>(); postParams.add(new BasicNameValuePair(RestConstants.POST_DATA_PARAM_NAME, postData.toString())); try { UrlEncodedFormEntity entity = new UrlEncodedFormEntity(postParams); entity.setContentEncoding(HTTP.UTF_8); //deleteReq.setEntity(entity); // There is no method setEntity() deleteReq.setHeader(RestConstants.CONTENT_TYPE_HEADER, RestConstants.CONTENT_TYPE_HEADER_VAL); } catch (UnsupportedEncodingException e) { logger.error("UnsupportedEncodingException: " + e); } Thanks in advance.

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