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• take my Java skills to the next level

  - by waingram

  I am well versed in the basics of Java programming, although through most of my career I have been maintaining, upgrading, and debugging someone else's Java code. I am mainly familiar with basic servlet applications. I have a strong beginner knowledge of Maven and Ant. I have more web development with Ruby on Rails, but would like to bring my Java skills up to par with regard to web development. It seems the world of Java is so big, I have no idea what the next logical step is for me. Spring? JAX-RB? EJBs? What is the next logical step for someone like me and how would you recommend I approach it?

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• New Video: Master/Detail in WinPhone 7 with oData

  The companion video to my mini-tutorial on  Windows Phone 7 Animation, Master/Detail and accessing an oData web service, is now available.    I am currently working on four video/tutorial series: Getting Started with Silverlight Windows Phone 7 Programming Blend for Developers The HyperVideo Platform project.  Which correspond to the Key Topics folders in the sidebar.  Please feel free to [...]...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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• understanding computers [closed]

  - by Ashwin

  Possible Duplicate: Good resources to understand how a program interacts with machine hardware I don't know if this is the correct StackExchange site to ask this question. But I could not find any other. I want to understand how a computer works from the software level to the internal structure. For example what happens when I press a button on keyboard. The OS interprets it and then what changes happen in the flip-flops. How is an operating system written? If it is written using some programming language, then how is that interpreter written. At some point it has to come down to the hardware, right? I know to program in c, c++ and java. But after all these years I am still not sure about what is happening inside. I would be grateful to anyone who points me to to a link or a video that explains this to the deep.

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• Data for animation

  - by saadtaame

  Say you are using C/SDL for a 2D game project. It's often the case that people use a structure to represent a frame in an animation. The struct consists of an image and how much time the frame is supposed to be visible. Is this data sufficient to represent somewhat complex animatio? Is it a good idea to separate animation management code and animation data? Can somebody provide a link to animations tutorials that store animations in a file and retrieve them when needed. I read this in a book (AI game programming wisdom) but would like to see a real implementation.

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• Who are the thought leaders in software engineering/development? [closed]

  - by Mohsin Hijazee

  Possible Duplicate: What are the big contemporary names in the programming field? I am sorry if it is a duplicate questions or is useless. I want to compile a list of influential people in our industry who can be termed as "opinionated" and thought leaders. There are basically two characteristics that I'm referring to here: The person has introduced new concepts/terminology/trends or talked about existing ones in thought provoking way. Majority or part of the writings are available online. Some of the people who I think as thought leaders are as under: Martin Fowler Known for domain specific languages, Active Record, IoC. Joel Spolsky known for his 12 point Joel test, Law of Leaky abstractions. Kent Beck known for XP. Paul Graham. Any other names and links?

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• Code maintenance: To add comments in code or to just leave it to the version control?

  - by Chillax

  We have been asked to add comments with start tags, end tags, description, solution etc for each change that we make to the code as part of fixing a bug / implementing a CR. My concern is, does this provide any added value? As it is, we have all the details in the Version control history, which will help us to track each and every change? But my leads are insisting on having the comments as a "good" programming practice. One of their argument is when a CR has to be de-scoped/changed, it would be cumbersome if comments are not there. Considering that the changes would be largely in between code, would it really help to add comments for each and every change we make? Shouldn't we leave it to the version control?

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• Trying to learn ASP.net

  - by sipl

  Hi There, I have a background in computers and had done programming some seven years ago. Switched to becoming a technical writer (oops!). And now think I should jump ship again, back to being a programmer. Of course the natural course of action where I can spend say two whole years learning to code, might not be available any more. I am keen on ASP.net as its the language that most products at my company are written in. I am sure this has been asked before, but here I go... where do I begin? Would really appreciate some practical advise. Thanks, SA

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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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• Why wont the LibGDX's main class Initialize on Android Launcher?

  - by BluFire

  So I was searching for different ways that could suit me in programming and came across LibGDX. Naturally I looked at the tutorial. As I was doing it, I was following the steps word for word, except naming the classes. In the end, I was able to create the desktop launcher for the game but not the android launcher. The following error is my error: Cannot instantiate the type Game (Game is the name of the class) I got the tutorial from http://steigert.blogspot.com.au/2012/02/1-libgdx-tutorial-introduction.html The link in the tutorial is the original but it uses jogl instead of lwjgl.

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• JavaOne is Free For Students!

  - by Yolande Poirier

  Attend the premier Java conference to learn about Java technologies and network with professionals. To be eligible, you must be taking a minimum of 6 units from a nonprofit institution of learning during the Fall 2014. You'll have access to JavaOne and OpenWorld keynotes and Exhibition Halls. And, space permitting, you  can attend all JavaOne sessions including HOLs (Hands-On Labs), conference sessions and BOF (Birds-of-a-Feather). This year, a lot of sessions are about parallel programming with Java 8, JVM languages, cloud and Internet of Things. Don't miss this opportunity to attend for free. Register now! 

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• JSR Updates and Inactive JSR ballots

  - by heathervc

  The following are JSRs have posted updates in the last week: JSR 331, Constraint Programming API, has posted a Maintenance Draft Review; this review closes 29 September. JSR 352, Batch Applications for the Java Platform, has posted an Early Draft Review; this review closes 29 September. JSR 353, Java API for JSON Processing, has posted an Early Draft Review; this review closes 7 October. Inactive JSRs: The following JSR proposals have been Inactive for at least two years and are currently on the EC ballot to be declared Dormant, following a period where the community was given an opportunity to express interest in their continued development: JSR 50, Distributed Real-Time Specification JSR 282, Real-Time Specification for Java (RTSJ) 1.1 JSR 307, Network Mobility and Mobile Data API JSR 327, Dynamic Contents Delivery Service API for Java ME JSR 328, Change Management API

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• How do I make a simple level system?

  - by ROROX

  I've been learning programming for a while and things are slow but steady. I only have a couple experiments that look something like a game (JavaScript,HTML5,CANVAS). One of the things I would like to establish this early in my process though is a basic level system to my games. I'm thinking like Atari, NES type simple. mainMenu , level1 , level2 , ... Later I'll work on including such screens as; titleScreen , pause , highScore. But for now just looking for the basics. Any good articles/tutorial links would help. Or just a snippet of code I can look over. Thank you kindly :)

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• Looking for a 24 Hour project for multiple languages [closed]

  - by Daan Timmer

  Right two friends and I came up with this idea of having a 24h programming competition. Where we are going to meet at one place and program away for 24hours long. Though we need a 'project'. Something that needs to be made within 24h. Doesn't have to be a real thing, just a nice learning 'thing'. The rules that we setup for ourselves is that the project can be programmed in any language of our own choice. What I know is that one guy is a PHP enthousiastic, we've got a C#/.NET person. And I am quite easy in languages and speak quite a few (PHP/C#.net/C++STL/Python/JavaScript/Java). Anything really language specific is out of the question. Is there anyone who happens to have a great idea for this?

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• Earliest use of Comments as Semantically Meaningful Things in a Program?

  - by Alan Storm

  In certain corners of the PHP meta-programming world, it's become fashionable to use PHPDoc comments as a mechanism for providing semantically meaningful information to a program. That is, other code will parse the doc blocks and do something significant with the information encoded in those comments. Doctrine's annotations and code generation are an example of this. What's the earliest (or some early) use of this technique? I have vague memories of some early java Design by Contract implementations doing similar things, but I'm not sure of those folks were inventing the technique, or if they got it from somewhere. Mainly asking so I can provide some historical context for PHP developers who haven't come across the technique before, and are distrustful of it because it seems a little crazy pants.

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• Is it possible to give an animated GIF a transparent background?

  - by Phil

  I'm making a Fire Emblem-esque game. There are very cute 2D frames I made for each character, and, like a game like Fire Emblem, I want these characters to animate constantly. To circumvent the graphics programming involved I came up with a novel idea! I would make each character an animated gif, and only in special conditions ever halt their constant movement - in that case just change what image is being displayed. Simple enough. But I have a dilemma - I want the background of my .gifs to be transparent (so that the "grass" behind each character naturally shows, as per the screenshot - which has them as still images with transparent backgrounds). I know how to make a background transparent in numerous tools (GIMP, Photoshop). But it seems every .gif creator replaces the transparent background with something and I can't edit it back to transparent. Is it possible to have a .gif with a transparent "background"? Perhaps my knowledge of file formats is limiting me here.

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• "Unclutter" units in RTS game

  - by TravisG

  For intentional reasons, certain units in the game I'm currently programming don't have any collision detection and response among each other. This enables them to clutter right on top of each other. This is a wanted behavior, since there will be situations in the game when the player does want them to stack like that. However, I want to make the process of uncluttering them easy for the player, so that they just have to press a hotkey or click some button on the screen and have the units disperse just enough so it's easy to select a group of them with the mouse (if they stand on top of each other one mouseclick selects all units). How could I do this without running a brute force N^2 nearest neighbor search on all units?

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• Progressbar patterns (Eclipse)

  - by JesperE

  I've struggled quite a bit with Eclipse and progress-monitors to try to have good progressbars which report useful progress information to the user. Inevitably the code gets cluttered with lots of things like if (monitor.isCancelled()) return; ... lengthyMethodCall(monitor.newChild(10)); and all over the place I need to pass a IProgressMonitor as an argument to my methods. This is bad, for several reasons: The code gets cluttered with lots of code which is not relevant to what the function actually does. I need to manually guesstimate which parts of the code takes time, and which parts do not. It interacts badly with automated tests; where much of the information which goes into a progressbar instead should be logged for later inspection. Is there a way out of this? Are there tools which can help me out with one or more of these problems? Should I be looking at Aspect-Oriented Programming tools, or are there other alternatives?

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• How to solve cyclic dependencies in a visitor pattern

  - by Benjamin Rogge

  When programming at work we now and then face a problem with visitors and module/project dependencies. Say you have a class A in a module X. And there are subclasses B and C in module Y. That means that module Y is dependent on module X. If we want to implement a visitor pattern to the class hierarchy, thus introducing an interface with the handle Operations and an abstract accept method in A, we get a dependency from module Y to module X, which we cannot allow for architectural reasons. What we do is, use a direct comparison of the types (i.e. instanceof, since we program in Java), which is not satisfying. My question(s) would be: Do you encounter this kind of problem in your daily work (or do we make poor architectural choices) and if so, how is your approach to solve this?

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• Survey says: Java technology rules

  - by hinkmond

  Eclipse came out with their Open Source Developer Report and Survey for 2012. In it, we see (in the words of the immortal Richard Dawson, RIP) "Surveys Says!": Java computer programming language is on top. See: Java is the top Here's a quote: The Eclipse community was invited to participate in the survey between April 23 and May 15 of this year. Skerrett says the Foundation promoted the survey primarily through social media (Facebook, Twitter) and online forums. Of the 840 people who responded, 732 completed the survey... So, now we know who's on top, we can keep this in mind the next time this question comes up on Family Feud. Hinkmond

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• How do I tell my boss he made the wrong choice? [migrated]

  - by SomeKittens

  Recently, our biggest product failed majorly because we'd only used outsourced labor to do it, and they never tested anything, etc. Finally, our CEO decided that the US team should learn the code and fix it up. (Not a total rewrite, but lots of formatting/style changes, refactoring, etc). However, he knows next to nothing about programming (thankfully, he admits it). He had been grooming me to take on the project manager position, but I had to go back to college. Now he gave it to another programmer who is naive and inexperienced. I don't feel the naive programmer will do nearly as well. The CEO's reasoning is that the naive programmer can work full time and I can only do part time, so the less senior programmer could put more work into it. How can I convince him that 15 hours of my time is worth more than the other guy's 40?

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• understanding technology that news websites use

  - by Registered User

  I am trying to understand the technology which many news websites use please have a look at this website http://www.shritimes.com/ if you click any news item then the particular thing gets zoomed and viewer can read the news as far as I can understand they have done some programming by which a gif image is opened up in a new pop up, can some one help to understand as what thing is used here javascript,html, php or what exactly? I have seen this feature in a lot of websites I want to know how it is achieved? I am looking from the code side of the things if some one can advise me any function call which does this I am a programmer but into C I am new to web kind of things.

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• Security Alert for CVE-2011-5035 Updated

  - by Eric P. Maurice

  Hi, this is Eric Maurice again.  Oracle has just updated the Security Alert for CVE-2011-5035 to announce the availability of additional fixes for products that were affected by this vulnerability through their use of the WebLogic Server and Oracle Container for J2EE components.  As explained in a previous blog entry, a number of programming language implementations and web servers were found vulnerable to hash table collision attacks.  This vulnerability is typically remotely exploitable without authentication, i.e., it may be exploited over a network without the need for a username and password.  If successfully exploited, malicious attackers can use this vulnerability to create denial of service conditions against the targeted system. A complete list of affected products and their versions, as well as instructions on how to obtain the fixes, are listed on the Security Alert Advisory.  Oracle highly recommends that customers apply these fixes as soon as possible.

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• How do you properly word a Google search when you don't even have a solution in mind? [closed]

  - by Bruno Romaszkiewicz

  So, I'm stuck on a problem, looking for a solution, my rubber duck can't help me, my co-workers can't help me. Next natural step is research, right? Google can help me, He always can. Or so I'm told. My problem is, I never found much use for Google when looking for a programming solution, it's very useful for finding how to implement one, but when you don't even know where to start, how do you properly word a Google search? Is there any other option?

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• Should I be using a game engine?

  - by Kyle

  I'm an experienced programmer, but I'm completely new to making games. I'm thinking of making an iPhone game that is similar to a 2d tower defense type game. In the web programming world, it would be a big waste of time to make a website without using some sort of web framework (eg ruby on rails). Is that the same for making games? Do people mostly use some sort of framework/game engine for making a game? If so, what are the popular ones for iOS?

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• Using gerrit (or similar tool) on a team where multiple devs work on a single feature

  - by Bacon

  We have a team of roughly ~8 devs who regularly work on the same feature over the course of a 3 week sprint. It isn't quite pair programming, but in our current workflow devs regularly push up incomplete code for a colleague to complete. This worked fine before we introduced Gerrit, but now our commits need to represent chunks of test-passing, complete, logical functionality, and so the model breaks. My only idea is to have everybody push up to a separate, untracked branch up until the functionality is ready for review, then squash everything into commits that make sense and push up. Is there another Gerrit-ized workflow that could work? I know this is a widely discussed topic on Google Groups, and that there has recently been some discussion of Gerrit topic reviews, but I wanted to see if there is anybody out there using Gerrit in this way, and what the suggested workflow would be.

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