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• Game-a-Week One Completed

  - by Matt Christian

  Last night I finished my Game-a-Week One and felt and extreme sense of accomplishment with what I finished in a single week. I removed all traces of the JigLibX code since it wasn't working properly due to my implementation and got my collision working thanks to some BoundingSpheres and Riemer's tutorials.  However, since the characters are Corndogs a rectangle bounding box would have made more sense although the bullets are only able to move forward currently. While developing it in a week was a challenge, developing it in a week while maintaining proper coding standards and clean, reusable code was damn near impossible.  It's possible my next step will be to either refactor it or move onto Game-a-Week Two. I will post a link to the game ZIP in the future.

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• How to link subprograms to a main program's game loop?

  - by Jim

  I recently discovered Crobot which is (briefly) a game where each player codes a virtual robot in a pseudo-C language. Each robot is then put in an arena where it fights against other robots. A robots' source code has this shape : /* Beginning file robot.r */ main() { while (1) { /* Do whatever you want */ ... move(); ... fire(); } } /* End file robot.r */ You can see that : The code is totally independent from any library/include Some predefined functions are available (move, fire, etc…) The program has its own game loop, and consequently is not called every frame My question is roughly : how does it work ? It seems that each robot's code is compiled by the main program and then used in a way I cannot understand. I thought it could yields a thread for each robot, but I have not any proof of this and it seems a bit complicated to achieve it. Any idea how it could work, someone ?

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• Good resources for JavaScript 2D game programming?

  - by DJCouchyCouch

  As an exercise, I've decided to look into JavaScript for game programming. While it's far from being the best language for that, I do like the idea that it's cross-platform and it's always available as a web page. So I thought I'd see what I could do with it. Specifically, I'd like to make a 2D tile-based game of some kind. Where can I find resources to do that? I'm sure this question's come up before, but I can't find any reference to it.

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• Component-based design: handling objects interaction

  - by Milo

  I'm not sure how exactly objects do things to other objects in a component based design. Say I have an Obj class. I do: Obj obj; obj.add(new Position()); obj.add(new Physics()); How could I then have another object not only move the ball but have those physics applied. I'm not looking for implementation details but rather abstractly how objects communicate. In an entity based design, you might just have: obj1.emitForceOn(obj2,5.0,0.0,0.0); Any article or explanation to get a better grasp on a component driven design and how to do basic things would be really helpful.

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• Do logged in users need to browse a site over https?

  - by Luke

  I've never thought it was necessary, but a client has requested that all webpages served to logged in users be delivered over HTTPS. Aside from the implementation standpoint, which I don't think I'm going to pursue is there any real reason for this request ? For clarity, the login / logout process, account settings, registration preferences and all user related scripts are served over https. but I can't see the point in my news articles, press releases, events etc... being served in this manner? Am I missing something ?

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• How could there still not be a mysqldb module for Python 3?

  - by itsadok

  This SO question is now more than two years old. MySQL is an incredibly popular database engine, Python is an incredibly popular programming language, and Python 3 has been officially released two years ago, and was available even before that. What's more, the whole mysqldb module is just a layer translating Python's db-api to MySQL's API. It's not that big of a library. I must be missing something here. How come almost* nobody in the entire open source community has spent the (I'm guessing) two weeks it takes to port this lib? Is Python 3 that unpopular? Is the combination of python and mysql not as common as I assume? Or maybe it's just a lot harder to port mysqldb than I assume? Anyone know the inside story on this? * Now I see that this guy has done it, which takes some of the wind out of my question, but it still seems to little and too late to make sense.

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• Why You never see a Sonic Screwdriver in Action Movies [Video]

  - by Asian Angel

  This video takes a humorous look at why you never see a sonic screwdriver in all those action movies. After all, having one would just ruin all of the ‘fun’ for everyone! Note: Video contains some language that may be considered inappropriate. Sonic Screwdriver [via Geeks are Sexy] How to See What Web Sites Your Computer is Secretly Connecting To HTG Explains: When Do You Need to Update Your Drivers? How to Make the Kindle Fire Silk Browser *Actually* Fast!

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• Keyboard shortcuts don't work continuously

  - by T. K.

  First I had the problem of the keyboard layout resetting itself on each reboot from DE (german) to EN (us). I followed the advice of using dconf in order to make the DE layout my personal default (see Keyboard layout switches to English each time I reboot). However, after that, my shortcuts didn't work properly anymore. In Firefox, Kile etc. everything works fine while in Nautilus, copying/erasing/pasting is impossible even when I change the keyboard layout back to En (us). Also, I'm not even able to select multiple items using the cursor in Nautilus while every acts normal on the desktop. It's quite confusing. I've read about a similar bug (see https://bugs.launchpad.net/unity/+bug/1226962) but since German is a latin language there is no appropriate solution given for my problem. Any help is really appreciated here. Edit: The third reboot resolved the problem so the shortcuts finally work in Nautilus again. Still, selecting multiple objects using the cursor isn't possible.

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• Ubuntu 13.10 New keyboard stuff bugged wine games

  - by karapinha

  I have made recently a fresh install of ubuntu 13.10. Since the first day I have problems with keyboard probably because of the new ibus thing... My language is PT-PT. One of those problems is the wrong behaviours on wine. games I was running in ubuntu 13.04 (tomb-raider, Skyrim, Shadow Warrior and Dark Souls) installed in the new ubuntu 13.10 they started to get key stuck when there is a combination like W+D+R (Drifting right + reloading) and its not because of windows/wine problems because the prefixes are the same that I had in 13.04. The key stuck as already been reported on winehq for Skyrim for some one using Linux Mint that was based on the 13.10. Is there a way of making the keyboard work like I was in 13.04? Or can i change the input type? Or downgrade ibus or something like that?

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• Is Java easy decompilation a factor worth considering

  - by Sandra G

  We are considering the programming language for a desktop application with extended GUI use (tables, windows) and heavy database use. We considered Java for use however the fact that it can be decompiled back very easily into source code is holding us back. There are of course many obfuscators available however they are just that: obfuscators. The only obfuscation worth doing we got was stripping function and variables names into meaningless letters and numbers so that at least stealing code and renaming it back into something meaningful is too much work and we are 100% sure it is not reversible back in any automated way. However as it concerns to protecting internals (like password hashes or sensible variables content) we found obfuscators really lacking. Is there any way to make Java applications as hard to decode as .exe counterparts? And is it a factor to consider when deciding whether to develop in Java a desktop application?

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• Create named criteria in EJB Data control

  - by shantala.sankeshwar

  This article gives the detailed steps on creating named criteria in EJB Data control.Note that this feature is available in Jdev version 11.1.2.0.0Use Case DescriptionSuppose we have defined an EJB Entity Object & we would like to filter the Entity object based on some criteria,then this filtering can be achieved by creating named criteria in EJB Data Control.Implementation stepsLet us suppose that we have created Java EE Web Application with Entities from Emp table Create session bean,generate data control for the same Edit empFindAll in DataControls.dcx fileCreate simple Named Criteria: deptno>=20Create on '+' icon to create Named Criteria:Refresh the Data Controls & create a new jspx page.Drop EmpCriteria as ADF Query Panel with TableRun the page,click on search button & we will see that Emp table shows filtered records

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• Expressing the UI for Enterprise Applications with JavaFX 2.0 FXML - Part Two

  - by Janice J. Heiss

  A new article by Oracle’s Java Champion Jim Weaver, titled “Expressing the UI for Enterprise Applications with JavaFX 2.0 FXML -- Part Two,” now up on otn/java, shows developers how to leverage the power of the FX Markup Language to define the UI for enterprise applications. Weaver, the author of Pro JavaFX Platform, extends the SearchDemoFXML example used in Part One to include more concepts and techniques for creating an enterprise application using FXML. Weaver concludes the article by summarizing its content, “FXML provides the ability to radically change the UI without modifying the controller. This task can be accomplished by loading different FXML documents, leveraging JavaFX cascading style sheets, and creating localized resource bundles. Named parameters can be used with these features to provide relevant information to an application at startup.” Check out the article here.

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• Server for online browser game

  - by Tim Rogers

  I am going to be making an online single player browser game. The online element is needed so that a player can login and store the state of their game. This will include things like what buildings have been made and where they have been positioned as well as the users personal statistics and achievements. At this point in time, I am expecting all of the game logic to be performed client side So far, I am thinking I will use flash for creating the client side of the game. I am also creating a MySQL database to store all the users information. My question is how do I connect the two. Presumably I will need some sort of server application which will listen for incoming requests from any clients, perform the SQL query and then return the data. Does anyone have any recommendations of what technology/language to use?

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• Initialized variables vs named constants

  - by Mike

  I'm working on a fundamental programming class in college and our textbook is "programming logic and design" by joyce farrell(spelling?) Anyhow, I'm struggling conceptually when it comes to initialized variables and named constants. Our class is focusing on pseudo-code for the time being and not one particular language so let me illustrate what I'm talking about. Let's say I am declaring a variable named "myVar" and the data type is numeric: num myVar now I want to initialize it (I don't understand this concept) starting with the number 5 num myVar = 5 how is that any different than creating a named constant?

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• Over a million COBOL porgrammers in the world?

  - by Lucas McCoy

  I think I heard on a previous StackOverflow podcast that COBOL was used as the programming language for traffic lights (or something like that), so this got me interested. I did a quick Google search and found this little article: Today, Cobol is everywhere, yet largely unheard of by millions of people who interact with it daily when using the ATM, stopping at traffic lights or buying a product online. The statistics on Cobol attest to its huge influence on the business world: There are over 220 billion lines of Cobol in existence, a figure which equates to about 80 per cent of the world’s actively used code. There over a million Cobol programmers in the world. There are 200 times as many Cobol transactions that take place each day than Google searches. I didn't really trust the source seeing as how it's on some random PHPBB forum. So how accurate are these figures? Are there really 220 billion lines of COBOL? I assume a few people/companies still use COBOL, but how many?

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• php+mysql account management software?

  - by kdavis8

  I need an account system added to my website as a plugin to all of my HTML pages. The account system plugin needs to,register new users, log in current users, remove users who want to disconnect service, and manipulate all of these things via database on my web server. However, I do not know how to program in the PHP language or create and manipulate MySQL databases. I want a program that can create and manipulate the MySQL database automatically for my website and handle also PHP calls automatically. Are there any open source freeware programs out there that i can use? If so what are the names of these freeware?

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• What are the typical applications of Lisp macros?

  - by Giorgio

  I am trying to learn some LISP and I have read a lot about the importance of LISP macros so I would like to get some working experience with them. Can you suggest a practical application area that would allow me to use macros to solve a real-world problem, and to understand the usefulness of this programming construct? NOTE This is not a generic what project should I do next question. I am interested to understand which kinds of problems are typically solved by means of LISP macros. E.g., are they good for implementing abstract data types? Why was this construct added to the language? What kinds of problems does it solve that cannot be solved by means of simple functions?

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• Best resources to learn Game Development from a Java background?

  - by Julio

  I'm an enterprise Java programmer, however something I've been interested in and what got me into the whole programming thing was the idea of being able to create a game. Just wondering if anybody could offer any advice, or book recommendations. The side I am most interested in is game engine design and implementation. People may say "ahh but plenty exist why write your own" - its purely for learning purposes, seeing how things work and so on. So far I've taken a look at LWJGL, but achieved nothing too serious. Thanks.

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• Does a mobile app need more access than the public API of a site?

  - by Iain

  I have a site with a public API, and some mobile app developers have been brought in to produce an iPhone app for the site. They insist they need to see the database schema, but as I understand it, they should only need access to the documented public API. Am I right? Is there something I've missed? I've told them that if there's a feature missing or data they require I can extend the API so that they can access it. I thought a web service API held to much the same principles as OOP object API's, in that the implementation details should be hidden as much as possible. I'm not a mobile app developer so if there is something I don't quite see then please let me know. Any insight or help will be much appreciated.

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• How can I implement an Iris Wipe effect?

  - by Vandell

  For those who doesn't know: An iris wipe is a wipe that takes the shape of a growing or shrinking circle. It has been frequently used in animated short subjects, such as those in the Looney Tunes and Merrie Melodies cartoon series, to signify the end of a story. When used in this manner, the iris wipe may be centered around a certain focal point and may be used as a device for a "parting shot" joke, a fourth wall-breaching wink by a character, or other purposes. Example from flasheff.com Your answer may or may not include a coding sample, a language agnostic explanation is considered enough.

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• Good Literature for "Object oriented programming in C"

  - by Dipan Mehta

  This is not a debate question about whether or not C is a good candidate for Object oriented programming or not. Quite often C is the primary platform where the development is happening. I have seen, and hopefully learnt through crawling many open source and commercial projects - that while the language inherently doesn't stop you if you create "non-object" code. However, you can still think in the "Object" way and reasonably write code that captures this designs thinking. For those who has done this, OO way is still the best way to write code even when you are programming in C. While, I have learnt most of it through the hard way, are there any deep literature that can help educate the relatively young guys about how to do OO programming in C?

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• Mail Scanning System

  - by Mr D

  In the same way gmail can generate ads based on email content, I am looking for a way to develop a system which can: Allow users to connect their email address to our site It then would continously monitor all incomming emails From the incomming emails there would be a critera(e.g. a certain address or subject) if any of the emails matched the critea it would would be saved to a database Then once a new email had been found the users would receive an email notification will tells them to log back into the site to see it. My questions are: Would this be possible? What would be a good language to use(generally I like php, python and java) Are there any frameworks which would help do this? How would I connect the users email account to allow access to their emails(do I need a mail server?) Any advice? Thank you! If you need more information please let me know.

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• Synchronizing local and remote cache in distributed caching

  - by ltfishie

  With a distributed cache, a subset of the cache is kept locally while the rest is held remotely. In a get operation, if the entry is not available locally, the remote cache will be used and and the entry is added to local cache. In a put operation, both the local cache and remote cache are updated. Other nodes in the cluster also need to be notified to invalidate their local cache as well. What's a simplest way to achieve this if you implemented it yourself, assuming that nodes are not aware of each other. Edit My current implementation goes like this: Each cache entry contains a time stamp. Put operation will update local cache and remote cache Get operation will try local cache then remote cache A background thread on each node will check remote cache periodically for each entry in local cache. If the timestamp on remote is newer overwrite the local. If entry is not found in remote, delete it from local.

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• Naming: objectAction or actionObject?

  - by DocSalvage

  The question, Stored procedure Naming conventions?, and Joel's excellent Making Wrong Code Look Wrong article come closest to addressing my question, but I'm looking for a more general set of criteria to use in deciding how to name modules containing code (classes, objects, methods, functions, widgets, or whatever). English (my only human language) is structured as action-object (i.e closeFile, openFile, saveFile) and since almost all computer languages are based on English, this is the most common convention. However, in trying to keep related code close together and still be able to find things, I've found object-action (i.e. fileClose, fileOpen, fileSave) to be very attractive. Quite a number of non-English human languages follow this structure as well. I doubt that one form is universally superior, but when should each be used in the pursuit of helping to make sure bad code looks bad?

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• Tyrus 1.1

  - by Pavel Bucek

  It might seem like there is not much time passed since Tyrus 1.0 (Java API for WebSocket reference implementation) release, but the fact is it was frozen several weeks before going public and development in the trunk continued. Tyrus 1.1 brings some new features and improvements: client-side proxy support simple command line client various stability/performance fixes (see below for complete list) Individual blog posts about highlighted features will follow, same as related user guide chapters.. stay tuned! Tyrus 1.1 is already integrated in Glassfish trunk - you can download nightly build or upgrade to newer Tyrus manually (replace all Tyrus jars; I know this is not very user friendly, so I'll try to come up with some better solution or at least simple guide). Complete list of bugfixes/improvements: TYRUS-180 TYRUS-176 TYRUS-192 TYRUS-186 TYRUS-191 TYRUS-187 TYRUS-172 TYRUS-194 TYRUS-179 TYRUS-178 TYRUS-200 TYRUS-177 TYRUS-181 TYRUS-203 TYRUS-205 TYRUS-198 TYRUS-202 TYRUS-188 TYRUS-149 Related links: https://tyrus.java.net https://java.net/jira/browse/TYRUS/

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