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  • Java Error Using Loops [migrated]

    - by Shaun
    I am facing a error in Java using the method Loops. I am a basic user learning Java and I am following a book with teaches you the basics of Java. I have this problem when I use this code in my Java Program. It gives me an red line under my code. Here's my code: public class Game{ public static void main(String[] args){ for (int dex = 0; dex < 1000; dex++) { if (dex % 12 == 0) { System.out.println(“#: “ + dex); } } } } I have been following the tutorials correctly. I am a bit lost where I have gone or done wrong. I have my public static codes and such as you'd require in any Java programming. Here's are the error given): Cannot resolve method: 'Println(? , ?)' Expression expected ',' or ')' expected Unexpected Token ';' expected

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  • Mix2010: Search Engine Optimization (SEO) for Microsoft Silverlight

    I had a great time today in my Mix2010 session on SEO for Silverlight.   You can find all the slides (more than I was able to cover in the talk) here.  and the the full play-by-play of the demo (include a link to the completed solution).    I started off talking why SEO matters Then I talked about three tips   You can view the site live by using Bing for my foodie Explorer Cooking Class with Joe.. or the other guys search engine equally well. ...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Component based design, but components rely on eatchother

    - by MintyAnt
    I've begun stabbing at a "Component Based" game system. Basically, each entity holds a list of components to update (and render) I inherit the "Component" class and break each game system into it. Examples: RenderComponent - Draws the entity MovementComponent - Moves the entity, deals with velocity and speed checks DamageComponent - Deals with how/if the entity gets damaged... So. My system has this: MovementComponent InputComponent Now maybe my design is off, but the InputComponent should say things like if (w key is down) add y speed to movement if (x key is down) Trigger primary attack This means that the InputComponent sort of relies on these other components. I have to do something alone the lines of: if (w key is down) { MovementComponent* entityMovement = mEntity->GetMovement(); if (entityMovement != NULL) add y speed to movement } which seems kinda crappy every update. Other options? Better design? Is this the best way? Thanks!

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  • Is this the correct way to implement .NET MVC website structure?

    - by aspdotnetuser
    I have recently seen a .NET MVC solution in which the markup in the .aspx views have a Controller as their model, and the .ascx user controls they contain use a separate model. I'm new to MVC and I wanted to find out about a few things I'm not clear on. An example of how the code is implemented: UserDetails.aspx view has markup that shows it's using the UserDetailsController.cs as the model. It contains RenderPartial("User_Details.ascx", UserDetailsModel) and passes it the UserDetailsModel. Is this the standard/correct way of implementing MVC? Or just one way to implement it? I also noticed that the classes used as Models appear to be Service classes that have [DataMember] and [DataContract] attributes on the class name and properties - what is the advantage of this implementation?

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  • Bomb timer adventure game win32 c++ [on hold]

    - by user3491746
    I'm working on an adventure game in win32 and opengl for my 2nd year university project for class. I am pretty much finished my game but I'm stuck on the concept of how to program a timer which outputs hh : mm : ss -- but which countdown, not up. I've made a clock which counts up using vector matrices and the segxseg matrix algorithm but I cannot figure out how to make a clock (it can be simple even text using wsprintf) that counts down in that format. Can anyone possible give me an example or some literature that I can read on how to do this? Please dont suggest for me to use another environment, I've already been working here for 2 months on this game, and I'm pretty much done so i'm at no point to switch over. Can anyone show me how I can take a shot at this component of my project? Thanks a bunch! Anything that I can get is appreciated.

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  • S&OP best practices that can help your organization be more responsive and effective

    - by user717691
    If you want to increase revenue by quickly responding to market changes or want to ensure that your operating plans drive towards corporate financial goals, you need real-time sales and operations planning.Watch the replay of our recent Webcast to hear Christopher Neff from NCR Corporation discuss how NCR Corporation is leveraging Oracle's Real-Time Sales and Operations Planning solutions. Learn best practices that can help your organization be more responsive and effective. Discover how Oracle's comprehensive suite of best-in-class capabilities can: Synchronize plans and actions across the extended enterprise Maximize profits with the ability to sense, influence, and fulfill demand with industry leading demand management and real-time sales & operations Drive tactical decisions into operational planning and execution, while monitoring performance Profitably balance supply, demand, and budgets Move planning processes from periodic and reactive to real-time, iterative and proactive Register now for the on demand Webcast! http://www.oracle.com/webapps/dialogue/ns/dlgwelcome.jsp?p_ext=Y&p_dlg_id=8664804&src=6811174&Act=99NCR Corporation is a leader in Self Service Solution such as POS Solutions, Payment and Imaging Systems.

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  • How do you handle domain logic that spans multiple model objects in an ORM?

    - by duality_
    So I know that business logic should be placed in the model. But using an ORM it is not as clear where I should place code that handles multiple objects. E.g. let's say we have a Customer model which has a type of either sporty or posh and we wanted to customer.add_bonus() to every posh customer. Where would we do this? Do we create a new class to handle all this? If yes, where do we put it (alongside all the other model classes, but not subclass it from the ORM?)? I'm currently using django framework in python, so specific suggestions are even more wanted.

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  • Unit testing a text index

    - by jplot
    Consider a text index such as a suffix tree or a suffix array supporting Count queries (number of occurrences of a pattern) and Locate queries (the positions of all the occurrences of a pattern) over a given text. How would you go about unit testing such a class ? What I have in mind is to generate a big random string then extract a random substring from this big string and compare the results of both queries with naive implementations (such as string::find). Another idea I have is to find the most frequent substring of length l appearing in the original string (using perhaps a naive method) and use these substrings for testing the index. This isn't the best way, so what would be a good design of the unit tests for a text index ? In case it matters, this is in C++ using google test.

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  • How to write loosely coupled classes in node.js

    - by lortabac
    I am trying to understand how to design node.js applications, but it seems there is something I can't grasp about asynchronous programming. Let's say my application needs to access a database. In a synchronous environment I would implement a data access class with a read() method, returning an associative array. In node.js, because code is executed asynchronously, this method can't return a value, so, after execution, it will have to "do" something as a side effect. It will then contain at least 1 line of extraneous code which has nothing to do with data access. Multiply this for all methods and all classes and you will very soon have an unmanageable "code soup". What is the proper way to handle this problem? Am I approaching it the wrong way?

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  • How to add reflection definition to read JSON files in web game

    - by user3728735
    I have a game which I deployed for desktop and Android. I can read JSON data and create my levels, but when it comes to reading JSON files from web app, I get an error that logs, "cannot read the json file". I researched a lot and I found out that I should add my JSON config class to configurations, so I added this line to gameName.gwt.xml, which is in core folder: <extend-configuration-property name="gdx.reflect.include" value="com.las.get.level.LevelConfig"/> But it did not work out. I have no idea where should I place this line or where I should change to make my web app work, so I can read JSON files.

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  • Cocos2d Box2d contact listener call different method in collided object

    - by roma86
    I have the building object, wen it hit with other, i want to call some method inside it. Building.mm -(void)printTest { NSLog(@"printTest method work correctly"); } in my ContactListener i trying to call it so: ContactListener.mm #import "ContactListener.h" #import "Building.h" void ContactListener::BeginContact(b2Contact* contact) { b2Body* bodyA = contact->GetFixtureA()->GetBody(); b2Body* bodyB = contact->GetFixtureB()->GetBody(); Building *buildA = (Building *)bodyA->GetUserData(); Building *buildB = (Building *)bodyB->GetUserData(); if (buildB.tag == 1) { NSLog(@"tag == 1"); } if (buildA.tag == 2) { NSLog(@"tag == 2"); [buildA printTest]; } } NSLog(@"tag == 2"); work correctly, but [buildA printTest]; get error Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[CCSprite printTest]: unrecognized selector sent to instance 0x18595f0' Obviously I'm referring to the wrong object. How i can get different method and property in contacted objects from contactlistener class? Thanks.

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  • When is using stdio preferable to fstream?

    - by Karl Bielefeldt
    I work on a well-established, embedded C++ code base. We have been using a proprietary API to our filesystem. For better integration with third-party C libraries, we are currently in the process of implementing most of stdio.h and fcntl.h. I made what I thought was a non-controversial proposal that we should also implement the fstream class and encourage new C++ code to use it instead of the new (to our code base) C-style API. We already have the stdout parts of iostream available, although it is not widely used. Given a choice between using stdio and fstream, what are good reasons to choose stdio for embedded software development in C++?

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  • Java chunk negative number problem

    - by user1990950
    I've got a tile based map, which is divided in chunks. I got a method, which puts tiles in this map and with positive numbers it's working. But when using negative numbers it wont work. This is my setTile method: public static void setTile(int x, int y, Tile tile) { int chunkX = x / Chunk.CHUNK_SIZE, chunkY = y / Chunk.CHUNK_SIZE; IntPair intPair = new IntPair(chunkX, chunkY); world.put(intPair, new Chunk(chunkX, chunkY)); world.get(intPair).setTile(x - chunkX * Chunk.CHUNK_SIZE, y - chunkY * Chunk.CHUNK_SIZE, tile); } This is the setTile method in the chunk class (CHUNK_SIZE is a constant with the value 64): public void setTile(int x, int y, Tile t) { if (x >= 0 && x < CHUNK_SIZE && y >= 0 && y < CHUNK_SIZE) tiles[x][y] = t; } What's wrong with my code?

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  • How to change the state of a singleton in runtime

    - by user34401
    Consider I am going to write a simple file based logger AppLogger to be used in my apps, ideally it should be a singleton so I can call it via public class AppLogger { public static String file = ".."; public void logToFile() { // Write to file } public static log(String s) { AppLogger.getInstance().logToFile(s); } } And to use it AppLogger::log("This is a log statement"); The problem is, what is the best time I should provide the value of file since it is a just a singleton? Or how to refactor the above code (or skip using singleton) so I can customize the log file path? (Assume I don't need to write to multiple at the same time) p.s. I know I can use library e.g. log4j, but consider it is just a design question, how to refactor the code above?

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  • DHCP won't start / subnetting

    - by user114371
    I recently changed the IP address on an Ubuntu 12.04 server I have in my lab, which is running isc-dhcp-server. After doing so and modifying the dhcpd.conf file, my dhcp service would not start. I basically used the same configuration, except I modified everything to use /25 scopes rather than /24. When I try to start / restart the service, I see the following: MY@ubuntuserver:~$ sudo service isc-dhcp-server restart stop: Unknown instance: isc-dhcp-server start/running, process 20918 It looks like it starts, but it isn't actually running and Webmin states that the DHCP service is not running. So my question is, does isc-dhcp-server support subnetting (CIDR) style scopes, or must they be class A / B / C scopes (doesn't seem likely)? I've double checked the interface reference (this is a VM with only one defined eth0 interface) and everything else I can thing of.

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  • specifying an object type at runtime

    - by lapin
    I've written a Vbo template class to work with opengl. I'd like to set the type from a config file at runtime. e.g. <vbo type="bump_vt" ... /> Vbo* pVbo = new Vbo(bump_vt, ...); Is there some way I can do this without a large if else block e.g. if( sType.compareTo("bump_vt") == 0 ) Vbo* pVbo = new Vbo(bump_vt, ...); else if ... I'm writing for multiple platforms in c++. thanks

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  • What are the best patterns/designs for stateful API development?

    - by Svante
    I am about to implement a API for my TCP/IP server written in Java. Right now I have a temporary method that takes a String, executes a command based on the String and returns a String basically like the following. public void communicate(BufferedReader in, PrintWriter out) { while(true) { out.println(handleCommand(in.readLine())); } } private String handleCommand(String command) { if (command.equals("command1") { // do stuff return "Command 1 executed"; } else if (command.equals("command2") { // do some other stuff return "Command 2 executed"; } } I really want to do something more extensible, smarter and stateful, so I could handle more complex and stateful commands and without the method/class getting bloated. How would you start? Suggestions, ideas, or links for further reading are very welcome.

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  • New Development Snapshot

    More bug fixing and rounding out IKVM.Reflection. Changes: Fixed resolution of generic type instance names with "fake" type as type argument. Fixed bug in Finalize/finalize special casing for .NET types that caused exception when reflecting on them. Fixed Finalize/finalize special casing for .NET types to also work for java.lang.Throwable derived types. Removed fake core class library types from ikvmstub and added a -bootstrap...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Microsoft Translator client library for Silverlight

    A while back immediately after MIX10 I started messing with Microsoft Translator APIs for Silverlight applications. I also got some people asking about Windows Phone 7 stuff and messed around with that a bit. Heres some post for reference: Make your Silverlight applications speak to you Using XNA libraries in Silverlight for Windows Phone 7 (with Translator as an example) In talking with the Translator team following MIX (where they announced they were working on a Silverlight class library...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Is it wrong to use a boolean parameter to determine behavior?

    - by Ray
    I have seen a practice from time to time that "feels" wrong, but I can't quite articulate what is wrong about it. Or maybe it's just my prejudice. Here goes: A developer defines a method with a boolean as one of its parameters, and that method calls another, and so on, and eventually that boolean is used, solely to determine whether or not to take a certain action. This might be used, for example, to allow the action only if the user has certain rights, or perhaps if we are (or aren't) in test mode or batch mode or live mode, or perhaps only when the system is in a certain state. Well there is always another way to do it, whether by querying when it is time to take the action (rather than passing the parameter), or by having multiple versions of the method, or multiple implementations of the class, etc. My question isn't so much how to improve this, but rather whether or not it really is wrong (as I suspect), and if it is, what is wrong about it.

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  • XNA When to call LoadContent

    - by Peteyslatts
    I have an enum in my game that denotes the game state ie MainMenu, InGame, GameOver, Exit and I was wondering if it would be advisable to add a new one in for PrepGame - in which the game creates viewports for however many players there are, creates the battlefield etc. I feel like this is a good idea except for one thing: should I make a call back to LoadContent() in this state? I could just put a switch statement in the LoadContent for my currentGameState. If it equals PrepGame load things like the skybox, ship models, texures, HUD graphics etc. Or is it a good idea to create an Asset Manager class in the first call to LoadContent() and load everything then. I feel like both approaches have different benefits: faster, but more load times vs slower initial load time, but then all my objects are referencing the same variables so I only have to load each on once. Any help is greatly appreciated. Thanks, Peter

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  • is it possible to get a programming job in the bay area?

    - by user475119
    Is it my perception or is it reality that it is harder to get software development work in Silicon Valley, than in other population centers? My theory is that some of the best and brightest (and youngest) are all here. All working for the top tech companies. And, little ol' me, over 40, math degree (not at Standford or Berkeley), ok at algorithms, and with many skills with many programming tools and concepts, but not published, and not top my class has a bit of a tough time competing. (I'm a Python programmer, by the way.) Thanks

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  • Is there any benefit to obsession with making code "look pretty"?

    - by TaylorOtwell
    Sometimes I spend ridiculous amounts of time (hours) agonizing over making code "look pretty". I mean making things look symmetrical. I will actually rapidly scroll through an entire class to see if anything jumps out as not looking "pretty" or "clean". Am I wasting my time? Is there any value in this kind of behavior? Sometimes the functionality or design of the code won't even change, I'll just re-structure it so it looks nicer. Am I just being totally OCD or is there some benefit hidden in this?

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  • Passing functions into other functions as parameters, bad practice?

    - by BlueHat
    We've been in the process of changing how our AS3 application talks to our back end and we're in the process of implementing a REST system to replace our old one. Sadly the developer who started the work is now on long term sick leave and it's been handed over to me. I've been working with it for the past week or so now and I understand the system, but there's one thing that's been worrying me. There seems to be a lot of passing of functions into functions. For example our class that makes the call to our servers takes in a function that it will then call and pass an object to when the process is complete and errors have been handled etc. It's giving me that "bad feeling" where I feel like it's horrible practice and I can think of some reasons why but I want some confirmation before I propose a re-work to system. I was wondering if anyone had any experience with this possible problem?

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  • How to add reflection definition to read json files on web game

    - by user3728735
    I have a game which I deployed for desktop and android, I can read json data and create my levels, but the problem is, when it comes to reading json files from web app, I get an error that logs, cannot read the json file, I researched a lot and I found out that I should add my json config class to configurations, I added this line to gameName.gwt.xml, which is in core folder <extend-configuration-property name="gdx.reflect.include" value="com.las.get.level.LevelConfig"/> but it did not work out too, I have no idea where should I place this line, or where should I change to make my web app work, so I can read json files

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