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• How to implement a game launch counter in LibGDX

  - by Vishal Kumar

  I'm writing a game using LibGDX in which I want to save the number of launches of a game in a text file. So, In the create() of my starter class, I have the following code ..but it's not working public class MainStarter extends Game { private int count; @Override public void create() { // Set up the application AppSettings.setUp(); if(SettingsManager.isFirstLaunch()){ SettingsManager.createTextFileInLocalStorage("gamedata"); SettingsManager.writeLine("gamedata", "Launched:"+count ,FileType.LOCAL_FILE ); } else{ SettingsManager.writeLine("gamedata", "Not First launch :"+count++ ,FileType.LOCAL_FILE ); } // // Load assets before setting the screen // ##################################### Assets.loadAll(); // Set the tests screen setScreen(new MainMenuScreen(this, "Main Menu")); } } What is the proper way to do this?

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• How to convert a Bazaar repository to GIT repository?

  - by Naruto Uzumaki

  We have a large bazaar repository and we want to convert it to a git repository. The bazaar repository contains the folders of each of the interns. Any documentation/code prepared by interns is committed in their directory so there are a huge number of commits. What steps should be performed to securely convert the bazaar repository to a git repository so that we do not lose any commit information. We firstly need to create a backup of the existing bazaar repository and then convert it. Edit: I followed this link: http://librelist.com/browser//cville/2010/2/9/migrate-repository-bzr-to-git/ It's working fine on my system with Ubuntu. But when I try to run it on the actual server it gives me EOF error and crashes Starting export of 1036 revisions ... fatal: EOF in data (1825 bytes remaining) fast-import: dumping crash report to .git/fast_import_crash_11804 Edit 2: I also tried it on a new CentOS system and received the following error fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree. Use '--' to separate paths from revisions

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• How to move a line of sprites in a sine wave?

  - by electroflame

  So, I'm spawning a horizontal line of enemies that I would like to have move in a nice wave. Currently I tried: Enemy.position.X += Enemy.velocity.X; Enemy.position.Y += -(float)Math.Cos(Enemy.position.X / 200) * 5; This...kind of works. But the wave is not a true wave. The top and bottom of one pass are not the same (e.g. 5 for the top, and -5 for the bottom (I don't mean literal points, I just meant that it's not symmetrical)). Is there a better way to do this? I would like the whole line to move in a wave, so it looks fluid. By that, I mean that it should look like each enemy is "following" the one in front of it. The code I posted does have this fluidity to it, but like I said, it's not a perfect wave. Any ideas? Thanks in advance.

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• Alternative to "inheritance v composition??"

  - by Frank

  I have colleagues at work who claim that "Inheritance is an anti-pattern" and want to use composition systematically instead, except in (rare, according to them) cases where inheritance is really the best way to go. I want to suggest an alternative where we continue using inheritance, but it is strictly forbidden (enforced by code reviews) to use anything but public members of base classes in derived classes. For a case where we don't need to swap components of a class at runtime (static inheritance), would that be equivalent enough to composition? Or am I forgetting some other important aspect of composition?

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• Why use string.Empty over "" when assigning to a string object

  - by dreza

  I've been running StyleCop over my code and one of the recommendations SA1122 is to use string.Empty rather than "" when assigning an empty string to a value. My question is why is this considered best practice. Or, is this considered best practice? I assume there is no compiler difference between the two statements so I can only think that it's a readability thing? UPDATE: Thanks for the answers but it's been kindly pointed out this question has been asked many times already on SO, which in hind-sight I should have considered and searched first before asking here. Some of these especially forward links makes for interesting reading. SO question and answer Jon Skeet answer to question

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• SmartXLS for .Net v2.1.4 released

  SmartXLS is a high performance .NET Excel component which can write, read, calculate Excel compatible files without the need for Microsoft Excel on either the developer or client machines. It was entirely written in 100% managed C# code.Features list:Cell formattingformula calculationread/write Encrypted Excel files(xls and xlsx files).create Chart,pivot table from scratchexport/import data to/from datatableNew release features:Excel2007 tables support.Excel2007 ConditionFormat support.http://ww...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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• Remove gravity from single body

  - by Siddharth

  I have multiple bodies in my game world in andengine. All the bodies affected by gravity but in that I want my specific body does not affected by the gravity. For that solution after research I found that I have to use body.setGravityScale(0) method for my problem solution. But in my andengine extension I don't found that method so please provide guidance about how get access about that method. Also for the above problem any other guidance will be acceptable. Thank You! I apply following code for reverse gravity final Vector2 vec = new Vector2(0, -SensorManager.GRAVITY_EARTH * bulletBody.getMass()); bulletBody.applyForce(vec, bulletBody.getWorldCenter());

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• Trial/Free & Full Version VS. Free App + In-app billing?

  - by SERPRO

  I'm just wondering what would be the best strategy to publish an application on the Android Market. If you have a free and paid version you have two codes to update (I know it will be 99% the same but still) and besides all the popular paid apps are quite easy to find for "free" in "alternative" markets. Also if you have any stored data in the trial/free version you lose it when you buy the full version.. On the other hand if you put a free application but inside you allow the user to unlock options (remove ads/more settings/etc...) you only have to worry about one code. I don't know the drawbacks of that strategy and how easy/hard is to hack that to get all the options for "free".

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• Complete Guide/Tutorials on LWJGL?

  - by user43353

  Dont get me wrong, I finished these tutorials on http://lwjgl.org/wiki/index.php?title=Main_Page. I finished The Basics section, OpenGL 3.2 and newer section, and I looked at the Example Code section. They were great tutorials, and I have looked at the external tutorials as well. I don't know where to go from here, and OpenGL is not my strong point. Some one suggested Learning Modern 3D Graphics Programming, and I didnt learn much. I looked at the port to LWJGL, but the book was on C and I couldn't really understand what the OpenGL meant. I am trying to learn 2D gaming, not 3D. Maybe later. Is there any tutorials that aren't C/C++ heavy and teach you 2D OpenGL?

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• Recommendation for Improving Programming Skills

  - by Moaz ELdeen

  I'm 25, I know C++ syntax since 9 years.. but It seems that I have copied so much code, and I didn't learn that much and didn't solve a lot of algorithms in my own. Currently I'm working for computer vision programmer as a junior and I have difficulity of doing algorithms like blob tracking or object tracking, writing algorithms like KNN, Quadtree,..etc. I don't know what to do, or what to improve, I tried to write asteriods game, I have finished it, and here you can watch it https://www.youtube.com/watch?v=jw0L4aCB4TU What should I do more to enhance my skills ?

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• Google's process for publishing/modifying pages [closed]

  - by Glenn Dayton

  I'm assuming that a group of people at Google have control of certain sections of google.com, but how does Google make sure that employees don't accidentally or intentionally sabotage the website? Does Google use Adobe Contribute or some similar product for sharing/publishing the website. Do employees use WebDAV, FTP, SFTP, or SSH to publish the site. Since Google has hundreds of thousands of servers it probably takes some time for its servers to update. Do they transmit the new copy of the website to all servers before publishing at once? This question does not apply to Google editing a database and having a page reflect the database's changes. It applies to employees editing the source code and/ or back end of the site.

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• How would you want to see software intellectual property protected?

  - by glenatron

  Reading answers to this question - and many other discussions of software patents - it seems that most of us as programmers feel that software patents are a bad idea. At the same time we are in the group most likely to lose out if our work is copied or stolen. So what level of Intellectual Property Protection does code and software need? Is copyright sufficient? Are patents necessary? As software is neither a physical object nor simple text, should we be thinking of a third path that falls somewhere between the two? Do we need any protection at all? If you had the facility to set up the law for this, what would you choose?

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• Software design methods for Java or any other programming language

  - by IkerB

  I'm junior programmer and I would like to know how professionals write their code or which steps they follow when they are creating new software. I mean, which steps they follow, which programming methodology, software architecture design application software, etc. I would like to find a tutorial where they explain from the beginning which steps I have to follow from The Idea I have in my mind to the final version of the application in any language. Or perhaps how is your programming steps or rules that you used to follow. Because everytime I want to create the an application I spend few time on the design and a lot of time coding (I know, that's not good).

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• One True Event Loop

  - by CyberShadow

  Simple programs that collect data from only one system need only one event loop. For example, Windows applications have the message loop, POSIX network programs usually have a select/epoll/etc. loop at their core, pure SDL games use SDL's event loop. But what if you need to collect events from several subsystems? Such as an SDL game which doesn't use SDL_net for networking. I can think of several solutions: Polling (ugh) Put each event loop in its own thread, and: Send messages to the main thread, which collects and processes the events, or Place the event-processing code of each thread in a critical section, so that the threads can wait for events asynchronously but process them synchronously Choose one subsystem for the main event loop, and pass events from other subsystems via that subsystem as custom messages (for example, the Windows message loop and custom messages, or a socket select() loop and passing events via a loopback connection). Option 2.1 is more interesting on platforms where message-passing is a well-developed threading primitive (e.g. in the D programming language), but 2.2 looks like the best option to me.

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• Wifi problem in ubuntu using macbook pro when it restart

  - by Amro

  I was read that subject : http://ubuntuforums.org/showthread.php?t=2011756 and i follow it step by step in the page n 1 , then i was connect but after i restart my macbook again , i was lost the wifi connection.i dont know why or whats the problem exactly. every time I run this command: dmesg | grep -e b43 -e bcma I get this output: [ 2012.769684] bcma-pci-bridge 0000:02:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17 [ 2012.769701] bcma-pci-bridge 0000:02:00.0: setting latency timer to 64 [ 2012.769775] bcma: Core 0 found: ChipCommon (manuf 0x4BF, id 0x800, rev 0x25, class 0x0) [ 2012.769808] bcma: Core 1 found: IEEE 802.11 (manuf 0x4BF, id 0x812, rev 0x1D, class 0x0) [ 2012.769889] bcma: Core 2 found: PCIe (manuf 0x4BF, id 0x820, rev 0x13, class 0x0) [ 2012.770175] bcma: PMU resource config unknown for device 0x4331 [ 2012.824527] bcma: Bus registered [ 2012.831744] b43-phy0: Broadcom 4331 WLAN found (core revision 29) [ 2013.371031] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07) and to get the connection again every time i must entery that code in the step of reload driver. How i can let the ubuntu see my wifi and wireless device automatically when i reboot my computer????

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• What's the best way to get up to speed with Java?

  - by Kosta

  I'm a software developer that just switched teams so I shall write code in Java now. Last time I wrote something in the language was in programming 101 at uni (I was already an amateur coder back then). So what is the best book/tutorial to get up to speed with Java? Where's the Java - the good parts? Learn you some Java for great good? Learn Java the hard way? Or is it too enterprisey for that kind of passion...?

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• Best practice for bulk eCommerce product upload?

  - by Or W

  I'm thinking about opening a large online store for Jewelry, the one thing that really bothers me is managing the actual operation of taking pictures, uploading and describing all the products. I'm trying to figure out the best way to do it, in terms of performance or the least time consuming. Just a few things to keep in mind I'll have over 1,000 items in the online store I'll have 3-4 pictures for each item, I'm using a DSLR camera if it makes any difference. I'm going to probably use Magento, unless you have better experience with another eCommerce platform that will help me get this done quickly. I'll need to randomly(?) create a product code for each item.

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• Memory Management/Embedded Management in C

  - by Sauron

  Im wondering if there is a set or a few good books/Tutorials/Etc.. that go into Memory Management/Allocation Specifically (or at least have a good dedicated section to it) when it comes to C. This is more for me learning Embedded and trying to keep Size down. I've read and Learned C fine, and the "standard" Learning books. However most of the books don't spend a huge amount of time (Understandably since C is pretty huge in general) going into the Finer details about whats going on Down Under. I saw a few on Amazon: http://www.amazon.com/C-Pointers-Dynamic-Memory-Management/dp/0471561525 http://www.amazon.com/Understanding-Pointers-C-Yashavant-Kanetkar/dp/8176563587/ref=pd_sim_b_1 (Not sure how relevant this would be) A specific Book for Embedded that has to do with this would be nice. But Code Samples or...Heck tutorials or anything about this topic would be helpful!

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• Markup format or script for data files?

  - by Aaron

  The game I'm designing will be mainly written in a high level scripting language (leaning towards either Lua or Squirrel) with a C++ core. In addition to scripts I'm also going to need different data files. Many data files will be for static information such as graphical assets and monster types. I'd also want to create and update data files at runtime for user information like option settings and game saves. Can I get away with using plain script files (i.e. .lua or .nut files) for my data files, or is it better to use dedicated markup formats like XML or YAML? If I use script files, loaded separately from my true scripts, then I wouldn't need an extra library to read those files. Scripting languages like Lua also have table syntax that lend themselves towards data definition. On the other hand I'd have to write my own schema check code. These languages also don't seem to support serialization "out of the box" like the markup format libraries do.

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• Hidden form and SEO

  - by AntonAL

  I'm using hidden forms, to collects some statistics. Will it have any penalty from search engines ? Update 1: I'm collecting some statistics, based on user interaction with my website. For example, POST requests will be sent to server, when: user stops a playing video user has watched a video till it's end etc. Using form_remote_for in Rails, i'm just rendering the form and keep it invisible. The reason on doing that - is to utilize authencity tokens, and just have less to code. Via JavaScript i'm only filling some hidden fields up and initiating form submission.

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• Absolute Top Programming Tips [closed]

  - by Eric

  I'm very intersted in the stuff that REALLY makes a critical difference to career in programming, other than intrinsic stuff like how smart your are, where you were born, etc... Some ideas: 1) Best approach to managing small, medium, and large teams. 2) Most important books to read. 3) Most important skills to know. 4) Correct balance of learning theory vs. just writing code. 5) A good approach to estimating time and cost of a project. 6) Etc... Please limit your answers. If you see somebody has already written your idea, please just vote for their response. I'd like to see what the community thinks are the true indicators of a successful career in our field.

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• What are cons of usage only non-member functions and POD?

  - by Miro

  I'm creating my own game engine. I've read these articles and this question about DOD and there was written to not use member functions and classes. I also heard some criticism to this idea. I can write it using member functions or non-member functions it would be similar. So what are benefits/cons of that approach or when project grows, does any of these approaches give clearer and better manageable code? With POD & non-member functions I don't have to make struct members public I can still use object id outside of engine like OpenGL does with all it's stuff, so It's not about encapsulation. POD - plain old data DOD - data oriented design

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• Will Google Analytics track URLs that just redirect?

  - by Derick Bailey

  I have a link on my site. That links goes to another URL on my site. The code on the server sees that resource being requested and redirects the browser to another website. Will Google Analytics be able to know that the user requested the URL from my server and was redirected? Specifically, I set up a /buy link on my watchmecode.net site to try and track who is clicking the "Buy & Download" button. This link/button hits my server, and my server immediately does a redirect to the PayPal processing so the user can buy the screencast. Is Google Analytics going to know that the user hit the /buy URL on my site, and track that for me? If not, what can I do to make that happen?

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• Exclude category from Wordpress home page unless it belongs to another category

  - by sirlancelot

  I have multiple users adding content to restricted categories (using RoleScoper) in my Wordpress setup that don't show up on the homepage (custom template with query_posts()). I'm looking for a way to "promote" the submitted content to the homepage by adding it to another category. My loop code looks like this: <?php query_posts($query_string . '&cat=-37'); if (have_posts()): while (have_posts()): the_post(); ?> This will exclude all posts in category 37. However, even if I add the post to a different category it still gets excluded. Is there a way to exclude a post if it belongs to just that one category?

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• T-SQL Tuesday #34: Help! I Need Somebody!

  - by Most Valuable Yak (Rob Volk)

  Welcome everyone to T-SQL Tuesday Episode 34!  When last we tuned in, Mike Fal (b|t) hosted Trick Shots.  These highlighted techniques or tricks that you figured out on your own which helped you understand SQL Server better. This month, I'm asking you to look back this past week, year, century, or hour...to a time when you COULDN'T figure it out.  When you were stuck on a SQL Server problem and you had to seek help. In the beginning... SQL Server has changed a lot since I started with it.  <Cranky Old Guy> Back in my day, Books Online was neither.  There were no blogs. Google was the third-place search site. There were perhaps two or three community forums where you could ask questions.  (Besides the Microsoft newsgroups...which you had to access with Usenet.  And endure the wrath of...Celko.)  Your "training" was reading a book, made from real dead trees, that you bought from your choice of brick-and-mortar bookstore. And except for your local user groups, there were no conferences, seminars, SQL Saturdays, or any online video hookups where you could interact with a person. You'd have to call Microsoft Support...on the phone...a LANDLINE phone.  And none of this "SQL Family" business!</Cranky Old Guy> Even now, with all these excellent resources available, it's still daunting for a beginner to seek help for SQL Server.  The product is roughly 1247.4523 times larger than it was 15 years ago, and it's simply impossible to know everything about it.*  So whether you are a beginner, or a seasoned pro of over a decade's experience, what do you do when you need help on SQL Server? That's so meta... In the spirit of offering help, here are some suggestions for your topic: Tell us about a person or SQL Server community who have been helpful to you.  It can be about a technical problem, or not, e.g. someone who volunteered for your local SQL Saturday.  Sing their praises!  Let the world know who they are! Do you have any tricks for using Books Online?  Do you use the locally installed product, or are you completely online with BOL/MSDN/Technet, and why? If you've been using SQL Server for over 10 years, how has your help-seeking changed? Are you using Twitter, StackOverflow, MSDN Forums, or another resource that didn't exist when you started? What made you switch? Do you spend more time helping others than seeking help? What motivates you to help, and how do you contribute? Structure your post along the lyrics to The Beatles song Help! Audio or video renditions are particularly welcome! Lyrics must include reference to SQL Server terminology or community, and performances must be in your voice or include you playing an instrument. These are just suggestions, you are free to write whatever you like.  Bonus points if you can incorporate ALL of these into a single post.  (Or you can do multiple posts, we're flexible like that.)  Help us help others by showing how others helped you! Legalese, Your Rights, Yada yada... If you would like to participate in T-SQL Tuesday please be sure to follow the rules below: Your blog post must be published between Tuesday, September 11, 2012 00:00:00 GMT and Wednesday, September 12, 2012 00:00:00 GMT. Include the T-SQL Tuesday logo (above) and hyperlink it back to this post. If you don’t see your post in trackbacks, add the link to the comments below. If you are on Twitter please tweet your blog using the #TSQL2sDay hashtag.  I can be contacted there as @sql_r, in case you have questions or problems with comments/trackback.  I'll have a follow-up post listing all the contributions as soon as I can. Thank you all for participating, and special thanks to Adam Machanic (b|t) for all his help and for continuing this series!

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