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  • interfacing: simplified

    - by code wombat
    i've been doing some research on interfaces and a simple layman's explanation for what it truly is. For some reason people love using overly complex explanations and jargon to explain truly simple concepts (guess it makes them feel big) and i have a gut feeling it's the same in this case. so from what i could grasp, it seems like interfaces are nothing more than a way to reserve method names, their return type if any, and the type and amount of arguments they accept. so when a class implements an interface (or interfaces) it is forced to define the body of each method from the interface(s). Am i on the nose with this one or do i need to keep digging? p.s. i know javascript doesn't have support for interfaces, but i still need to understand the concept because there are quite a few places where it's shown how to emulate to an extent.

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  • Using NSWindow or NSPanel as "CardLayout"

    - by Leandro
    How guys. I'm not top dev in java, but what I`m really not is cocoa top dev :P I would like to have your assistance to produce a layout with cocoa and IB to work just like the CardLayout in Java. Do you have some idea of how to do it? Thanks for the attention! EDIT: CardLayout: A set of panels ("cards") are designed to compose a "deck of cards".It works like a queue of panels, in which only the first "card" is shown on the interface.I can easily interchange between cards if I want so to modify the interface to the user. I hope I could help you to help me. =)

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  • Open generic interface types of open implementation don't equal interface type?

    - by George Mauer
    Here's a test that should, in my opinion be passing but is not. [TestMethod] public void can_get_open_generic_interface_off_of_implementor() { typeof(OpenGenericWithOpenService<>).GetInterfaces().First() .ShouldEqual(typeof(IGenericService<>)); } public interface IGenericService<T> { } public class OpenGenericWithOpenService<T> : IGenericService<T> { } Why does this not pass? Given Type t = typeof(OpenGenericWithOpenService<>) how do I get typeof(IGenericService<)? I'm generally curious, but if you're wondering what I'm doing, I'm writing a Structuremap convention that forwards all interfaces implemented by a class to the implementation (as a singleton).

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  • Making a web interface for neo4j

    - by user2898839
    I have a local neo4j database server and I want to build a web interface using javascript. Ideally I want to do all the querying and display the result client side for the website. I am mostly a Java programmer and unfortunately don't have much experience with Javascript. How can I do a cypher query from the website and return the result in a format which I can display easily in a table for example? I have seen examples of doing the querying server side with servlets or node.js but really would like to just have the neo4j server and the website client. I would be interesting in seeing a small working example if it is at all possible. Thanks for your time.

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  • Errors in UILabel

    - by Todd Davies
    I'm trying to use the FXlabel when following this (Adding a gradient label section) tutorial. This is some of the code inside my viewDidLoad method: self.logoLabel = [[FXLabel alloc] initWithFrame:CGRectMake(14, 11, 280, 87)]; [logoLabel setFont:[UIFont boldSystemFontOfSize:45]]; [logoLabel setTextColor:[UIColor whiteColor]]; [logoLabel setShadowColor:[UIColor blackColor]]; [logoLabel setShadowOffset:CGSizeMake(0, 2)]; [logoLabel setTextAlignment:UITextAlignmentCenter]; [logoLabel setBackgroundColor:[UIColor clearColor]]; [logoLabel setText:@"Attorney Biz"]; [logoLabel setGradientStartColor:[UIColor colorWithRed:163.0/255 green:203.0/255 blue:222.0/255 alpha:1.0]]; [logoLabel setGradientEndColor:[UIColor whiteColor]]; Unfortnuately, I get an error "No visible @interface for 'UILabel' declares the selector 'setGradientStartColor'" at the second-to-last line and "No visible @interface for 'UILabel' declares the selector 'setGradientEndColor'" Can somebody explain how to remove these errors?

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  • Proper way to build a data Repository

    - by rockinthesixstring
    I'm working on using the Repository methodology in my App and I have a very fundamental question. When I build my Model, I have a Data.dbml file and then I'm putting my Repositories in the same folder with it.... IE: Data.dbml IUserRepository.cs UserRepository.cs My question is simple. Is it better to build the folder structure like that above, or is it ok to simply put my Interface in with the UserRepository.cs? Data.dbml UserRepository.cs              which contains both the interface and the class

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  • PropertyGrid + interface

    - by nilphilus
    public interface ITest { void Somethink(); } public class Test1 : ITest { public void Somethink() { /* do stuff */ } public int Test1Property { get; set; } } public class Test2 : ITest { public void Somethink() { /* do stuff */ } public float Test2Property { get; set; } } //Main class public class MainClass { [TypeConverter(ExpandableObjectConverter)] public ITest test { get; set; } } Ok, i have sth like this. Instance of MainClass is selected by PropertyGrid. How to make a DropDownList of objects of classes which implement ITest (here Test1 and Test2)

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  • Xcode/Interface Builder Mac App Development

    - by user1459546
    Well i want from the drop down menu(Menu Item List) one item to be working as an link, to open an url/website in safari - thats it. When this is so simple, why no one come up with a clue here - I tried many different ways in Xcode, with Apple Xcode Samples... i think i need an AppDelegate.m, drag or link some parts, get actions... i failed to get it going somewhere - now i'm lost. Any advice/help/link/tip would be much appreciate to solve this "simple" issue... Using Xcode/Interface Builder 3.2.6 - Please help or i go totally mad, insane and i will crash my f...ing mac right now - Thanks

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  • Understanding reflection

    - by sdmiller
    I recently started work at a new company and a .net web application we have is built using reflection. I have only been out of school for a year and haven't worked with this concept. After studying the code... it looks like there is a single backend interface of type object that has about 20 classes that inherit from it. lots of generic gets and sets On the surface it looks like standard inheritance to me. I guess my question is, what makes this reflection? Is it because the interface is not strongly typed? Thanks

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  • Sorting related objects in the Django Admin form interface

    - by Carver
    I am looking to sort the related objects that show up when editing an object using the admin form. So for example, I would like to take the following object: class Person(models.Model): first_name = models.CharField( ... ) last_name = models.CharField( ... ) hero = models.ForeignKey( 'self', null=True, blank=True ) and edit the first name, last name and hero using the admin interface. I want to sort the objects as they show up in the drop down by last name, first name (ascending). How do I do that? Context I'm using Django v1.1. I started by looking for help in the django admin docs, but didn't find the solution As you can see in the example, the foreign key is pointing to itself, but I expect it would be the same as pointing to a different model object. Bonus points for being able to filter the related objects, too (eg~ only allow selecting a hero with the same first name)

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  • Difference between Class Abstraction and Object Interfaces in PHP?

    - by Mark Tomlin
    What is the difference between a Class Abstraction and an Object Interfaces in PHP? I ask because, I don't really see the point to both of them, they both do the same thing! So, what are the advantages of disadvantages using both against one or the other? Class Abstraction: abstract class aClass { // Force extending class to define these methods abstract public function setVariable($name, $var); abstract public function getHtml($template); } Object Interface: interface iClass { // Force impementing class to define these methods public function setVariable($name, $var); public function getHtml($template); }

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  • How do I run modals windows from code with cocoa?

    - by Leandro
    Hi,everybody I`m trying to run a window as modal directly from the code. My program starts and a main NSWindows is showed.A thread still running to see if the user has a valid distribution. if he doesn't I need to run a modal.I mean, I have no buttons clicked in the interface.I've designed a NSWindow on the interface builder for a password set, and I want to call it only when my validation is not successful. I have tested and realized that these methods which are responsible for modal windows running only work in a IBAction environment. //This doesn't work -(void) showPasswordWindow { [NSApp runModalForWindow:[self window]]; } //this works But its not useful for me =( - (IBAction) passwordWindowButton:(id)sender { [NSApp runModalForWindow:[self window]]; } Please, help this newbie =)

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  • Parsing csv line to Java objects

    - by Noobling
    I was wondering if someone here could help me, I can't find a solution for my problem and I have tried everything. What I am trying to do is read and parse lines in a csv file into java objects and I have succeeded in doing that but after it reads all the lines it should insert the lines into the database but it only inserts the 1st line the entire time and I don't no why. When I do a print it shows that it is reading all the lines and placing them in the objects but as soon as I do the insert it wants to insert only the 1st line. Please see my code below: public boolean lineReader(File file){ BufferedReader br = null; String line= ""; String splitBy = ","; storeList = new ArrayList<StoreFile>(); try { br = new BufferedReader(new FileReader(file)); while((line = br.readLine())!=null){ line = line.replace('|', ','); //split on pipe ( | ) String[] array = line.split(splitBy, 14); //Add values from csv to store object //Add values from csv to storeF objects StoreFile StoreF = new StoreFile(); if (array[0].equals("H") || array[0].equals("T")) { return false; } else { StoreF.setRetailID(array[1].replaceAll("/", "")); StoreF.setChain(array[2].replaceAll("/","")); StoreF.setStoreID(array[3].replaceAll("/", "")); StoreF.setStoreName(array[4].replaceAll("/", "")); StoreF.setAddress1(array[5].replaceAll("/", "")); StoreF.setAddress2(array[6].replaceAll("/", "")); StoreF.setAddress3(array[7].replaceAll("/", "")); StoreF.setProvince(array[8].replaceAll("/", "")); StoreF.setAddress4(array[9].replaceAll("/", "")); StoreF.setCountry(array[10].replaceAll("/", "")); StoreF.setCurrency(array[11].replaceAll("/", "")); StoreF.setAddress5(array[12].replaceAll("/", "")); StoreF.setTelNo(array[13].replaceAll("/", "")); //Add stores to list storeList.add(StoreF); } } //print list stores in file printStoreList(storeList); executeStoredPro(storeList); } catch (Exception ex) { nmtbatchservice.NMTBatchService2.LOG.error("An exception accoured: " + ex.getMessage(), ex); //copy to error folder //email } return false; } public void printStoreList(List<StoreFile> storeListToPrint) { for(int i = 0; i <storeListToPrint.size();i++){ System.out.println( storeListToPrint.get(i).getRetailID() + storeListToPrint.get(i).getChain() + storeListToPrint.get(i).getStoreID() + storeListToPrint.get(i).getStoreName() + storeListToPrint.get(i).getAddress1() + storeListToPrint.get(i).getAddress2() + storeListToPrint.get(i).getAddress3() + storeListToPrint.get(i).getProvince() + storeListToPrint.get(i).getAddress4() + storeListToPrint.get(i).getCountry() + storeListToPrint.get(i).getCurrency() + storeListToPrint.get(i).getAddress5() + storeListToPrint.get(i).getTelNo()); } } public void unzip(String source, String destination) { try { ZipFile zipFile = new ZipFile(source); zipFile.extractAll(destination); deleteStoreFile(source); } catch (ZipException ex) { nmtbatchservice.NMTBatchService2.LOG.error("Error unzipping file : " + ex.getMessage(), ex); } } public void deleteStoreFile(String directory) { try { File file = new File(directory); file.delete(); } catch (Exception ex) { nmtbatchservice.NMTBatchService2.LOG.error("An exception accoured when trying to delete file " + directory + " : " + ex.getMessage(), ex); } } public void executeStoredPro(List<StoreFile> storeListToInsert) { Connection con = null; CallableStatement st = null; try { String connectionURL = MSSQLConnectionURL; Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance(); con = DriverManager.getConnection(connectionURL, MSSQLUsername, MSSQLPassword); for(int i = 0; i <storeListToInsert.size();i++){ st = con.prepareCall( "IF EXISTS (SELECT * FROM tblPay@RetailStores WHERE StoreID = " + storeListToInsert.get(i).getStoreID() + " AND RetailID = "+ storeListToInsert.get(i).getRetailID() + ")" + " UPDATE tblPay@RetailStores " + " SET RetailID = '" + storeListToInsert.get(i).getRetailID() + "'," + " StoreID = '" + storeListToInsert.get(i).getStoreID() + "'," + " StoreName = '" + storeListToInsert.get(i).getStoreName() + "'," + " TestStore = 0," + " Address1 = '" + storeListToInsert.get(i).getAddress1() + "'," + " Address2 = '" + storeListToInsert.get(i).getAddress2() + "'," + " Address3 = '" + storeListToInsert.get(i).getAddress3() + "'," + " Address4 = '" + storeListToInsert.get(i).getAddress4() + "'," + " Address5 = '" + storeListToInsert.get(i).getAddress5() + "'," + " Province = '" + storeListToInsert.get(i).getProvince() + "'," + " TelNo = '" + storeListToInsert.get(i).getTelNo() + "'," + " Enabled = 1" + " ELSE " + " INSERT INTO tblPay@RetailStores ( [RetailID], [StoreID], [StoreName], [TestStore], [Address1], [Address2], [Address3], [Address4], [Address5], [Province], [TelNo] , [Enabled] ) " + " VALUES " + "('" + storeListToInsert.get(i).getRetailID() + "'," + "'" + storeListToInsert.get(i).getStoreID() + "'," + "'" + storeListToInsert.get(i).getStoreName() + "'," + "0," + "'" + storeListToInsert.get(i).getAddress1() + "'," + "'" + storeListToInsert.get(i).getAddress2() + "'," + "'" + storeListToInsert.get(i).getAddress3() + "'," + "'" + storeListToInsert.get(i).getAddress4() + "'," + "'" + storeListToInsert.get(i).getAddress5() + "'," + "'" + storeListToInsert.get(i).getProvince() + "'," + "'" + storeListToInsert.get(i).getTelNo() + "'," + "1)"); st.executeUpdate(); } con.close(); } catch (Exception ex) { nmtbatchservice.NMTBatchService2.LOG.error("Error executing Stored proc with error : " + ex.getMessage(), ex); nmtbatchservice.NMTBatchService2.mailingQueue.addToQueue(new Mail("[email protected]", "Service Email Error", "An error occurred during Store Import failed with error : " + ex.getMessage())); } } Any advise would be appreciated. Thanks

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  • How to use AutoLayout to position UIButtons in horizontal lines?

    - by thomers
    I need to create a couple of UIButtons programmatically in my app (iOS 6.0 and above). Each button should have the optimal width to display button label text (of various lenghts). I want to display the buttons in a "wrap around" style: Starting from the left edge, each button should be positioned next to each other horizontally (in a defined order), and if a button does not fit in the current "line", it should start a new line on the left edge below the previous line. I could manually calculate the frame of each button in my code, but should I use AutoLayout (with programmatically creates NSLayoutConstraints) instead? How exactly would I need to set it up?

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  • Build common interface for two applications(one is in .asp, other in java)

    - by govardhan
    We have two applications. One application in .asp and second application in java. we want to build interface for universal authentication, so that one can access the other application once signed into one application. Both applications are using SQL database, but one is written in .ASP hosted on Windows server while the other is in JAVA hosted on a Linux server. The applications are currently resided on two different servers. requirements: 1)The end user are most likely to access the applications through .ASP first, then reach the 2nd application more like "back office" management system. 2)he JAVA application currently works well with IE web browser, but not very smooth with other browsers such as Firefox. Would like to make the application to be more compatible with other browsers. Please help me, its very important to me. Thanks in advance!

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  • ASP.NET Custom Control With A Property That Is An Interface

    - by user129674
    I want to have a property on my custom control that is an interface type. For example: [ ToolboxData("<{0}:MyTextBox runat=server></{0}:MyTextBox"), ParseChildren(true, "Validation") ] class MyTextBox : WebControl { [ Category("Behavior"), Description("The validation to use"), DesignerSerializationVisibility(DesignerSerializationVisibility.Content), PersistenceMode(PersistenceMode.InnerDefaultProperty) ] public IValidation Validation { get; set; } } Then when I go to use my control in a web form I would like to be able to do: <my:MyTextBox ID="txt" runat="server"> <my:FancyValidator /> </my:MyTextBox> That way I will be able to define one class that could use any number of validators. When I try and do this now, I end up with an error saying: Type 'IValidator' does not have a public property named 'FancyValidator' What do I need to do to make this work? Thanks!

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  • How does transmission created it's cross plataform app? It has from Qt/Mac to CLI interfaces!

    - by Somebody still uses you MS-DOS
    I'm amazed at Transmission, a BT client. It has a Mac, a GTK+, a QT, a Web Client and a CLI interface to it. I tried reading some of it's source to understand how he creates all these interfaces, but no luck. Does the developer creates them using a single ide? Or does he create the interface logic in each specific environment (specially mac), "exports" this window code and integrates with the main logic? How did the developers create this software with so many interfaces?

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  • C# compiler fails to recognize a class is implementing an interface

    - by Freek
    The following code fails to compile (using VS2010) and I don't see why. The compiler should be able to infer that List is 'compatible' (sorry for lack of a better word) with IEnumerable, but somehow it doesn't. What am I missing here? interface ITest { void Test(); } class TestClass : ITest { public void Test() { } } class Program { static void Test(IEnumerable<ITest> tests) { foreach(var t in tests) { Console.WriteLine(t); } } static void Main(string[] args) { var lst = new List<TestClass>(); Test(lst); // fails, why? Test(lst.Select(t=>t as ITest)); //success Test(lst.ToArray()); // success } }

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  • Calling inheriting class methods via interface.

    - by Stacey
    Given the scenario... interface IBase{ void Process(int value); } abstract class Base : IBase { public virtual void Process(int value){ throw new NotImplementedException(); } } class Implemented: Base, IBase { public void Process(int value) { // .. some code here.. } } I'm trying to write a loop similar to the following. foreach( Base b in CollectionOfImplemented ) { b.Process( // something will go here // ); } Trying this, it keeps calling Base.Process, instead of Implemented.Process; but the type in the collection is Implemented, not Base. Boxing it seems to work, but I was hoping to see if I could find a more intelligent approach to it, since the Collection will contain other types of objects that also inherit from Base.

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  • Design classes/interface to support methods returning different types

    - by Nayn
    Hi, I have classes as below. public interface ITest <T> { public T MethodHere(); } public class test1 implements ITest<String> { String MethodHere(){ return "Bla"; } } public class test2 implements ITest<Integer> { Integer MethodHere(){ return Integer.valueOf(2); } } public class ITestFactory { public static ITest getInstance(int type) { if(type == 1) return new test1(); else if(type == 2) return new test2(); } } There is a warning in the factory class that ITest is used as raw type. What modification should I do to get rid of it? Thanks Nayn

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  • How to implement fluent interface with a base class, in C++

    - by Vincenzo
    How can I implement this fluent interface in C++: class Base { public: Base& add(int x) { return *this; } } class Derived : public Base { public: Derived& minus(int x) { return *this; } } Derived d; d.add(1).minus(2).add(3).minus(4); Current code doesn't work since Base class doesn't know anything about Derived class, etc. I would be very thankful for a hint/suggestion.

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  • custom implementation of interface methods

    - by Renuka
    Hello all, I have a doubt in this scenario, I have posted some example code here.... public interface a{ public void m1(); public void m2(); public void m3(); . . . public void m100(); } public class A implements a{ public void m3(){ // implementation code } // Here i need to implement only m3() method but not all 100 methods //basically i have to implement all the other 99 methods // but here i don't want to either implement or provide skeleton declarations for all //remaining.... what should i do for compiling this ???? } Could anyone help this?

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  • How should 4 decimals places behave, being simple yet powerful

    - by vener
    I have a UI question that troubled me on the best method to handle 4 decimal places for prices. In an table already cramped full of data, I would want to simplified the interface to make it not so cluttered. The actual current UI is shown below. http://i41.tinypic.com/bg5tub.jpg The problem is, for a unit price/units/D.Price and Dis.(Discount) to have 4 decimal places ($0.3459) is quite rare but it still happens (5 in 100 entries). This will result a lot of junk decimal places, cluttering up the interface. What is the best solution to this problem? In short, I want to declutter it yet maintain the precision. Note: This is web app

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  • C# creating a custom user interface

    - by CSharpInquisitor
    Hi, I have a SQL database holding a number of numeric and text values that get updated regularly. The exact number/type/names of these data points can change depending on the source of the database writes. I would like to create a user interface editor, where the user can add database points to the UI and arrange them and format them as they want. If a new point is added to the database they can right click on the UI and say "add this point" and choose from a list of database points. I'm looking for some pointers on where to start on creating this editor application, could something clever be done using XAML to dynamically create std WPF controls at runtime? Thanks in advance for any help, Si

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  • creating a custom user interface in WPF

    - by CSharpInquisitor
    I have a SQL database holding a number of numeric and text values that get updated regularly. The exact number/type/names of these data points can change depending on the source of the database writes. I would like to create a user interface editor, where the user can add database points to the UI and arrange them and format them as they want. If a new point is added to the database they can right click on the UI and say "add this point" and choose from a list of database points. I'm looking for some pointers on where to start on creating this editor application, could something clever be done using XAML to dynamically create std WPF controls at runtime?

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