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  • LibGDX - SpriteBatch's .draw() method requiring float[]

    - by just_a_programmer
    Please excuse my lack of knowledge with LibGDX, as I have just started learning it. I am going through some simple tutorials, and in one of them, I draw a string onto the screen like so: // the following code is in the main file in the core project folder: // this is in the create() method: private SpriteBatch batch; batch = new SpriteBatch(); // this is in the render() method: batch.draw(batch, "Hello world", 200, 200); I am getting an error saying: The method draw(texture, float[], int, int) in the type SpriteBatch is not applicable for the arguments (SpriteBatch, int, int) So, LibGDX wants a float array to draw instead of a string? Thanks in advance.

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  • How should I deploy my JVM-based web application on ubuntu?

    - by Pieter Breed
    I've developed a web application using clojure/compojure (JVM based) and while developing I tested it using embedded jetty that runs on 0.0.0.0:8080. I would now like to deploy it to run on port 80 on ubuntu. I do dynamic virtual hosting, so any request for any host that arrives on port 80 should be handled by my application. The issues that worries me are: I can still run it embedded but I'm worried about running my app as root (needed for binding to port 80). I'm not sure if I can 'give up root' when in the JVM. Do I need to be concerned by this? besides, serving web applications is a known problem and I should be using known solutions for this (jetty or tomcat) but especially tomcat seems very heavy weight. Besides, I only have one application that listens to /* and does routing internally. (with compojure/ring). What I'm trying to say with this is that tomcat by default assigns WARs to subfolders which I don't want. So basically what I need is some very safe way of binding to port 80 on ubuntu that can with minimal interference send all requests to my app. Any ideas?

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  • Play 2 with Scala or Java?

    - by Mik378
    I want to develop a big personal project using Play 2 Framework. I am expert with Java language but it seems, with the few articles I read that Play 2 works perfectly and especially with Scala. I've never worked with Scala but I already learned concept as closures, functional programming etc... Learning it would be interesting. I am really motivated for but I wonder if there are some people who have started coding with Play2/Java and have changed for Play2/Scala that could explain their major concrete advantages.

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  • The New My Oracle Support User Interface (HTML-based)

    - by user793553
    A single source for learning about the latest enhancements to the My Oracle Support User Interface... On January 27, 2012, we launched a new My Oracle Support HTML-based user interface (UI). The new user interface is built using Oracle’s Application Development Framework and is our first step towards providing a single online support portal for our customers and partners; one that all users will transition to in the coming months. Further enhancements to the HTML-based user interface are planned for April 13, 2012. We will transition users of the standard Flash-based interface in the coming months. To help facilitate a smooth transition, we invite you to preview and begin using the new My Oracle Support interface by going to supporthtml.oracle.com and sign in using your Single Sign-on username and password For full information regarding functionality, supported browsers and links to quick and easy videos on how to navigate the new UI, please check out Doc ID 1385682.1 

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  • Raspberry Pi + Azure + Mobile App

    - by Richard Jones
    Ongoing project idea. So this is of long running personal interest to build a Mobile App that shows you a push notification/pop up alert, when anyone calls your house phone. So I've taken delivery of a Raspberry Pi. I've ordered a new Crucible Technology Caller ID Box. (arriving soon). I have been writing/learning Python to implement the Listener software. This will in turn push xml messages up to Azure for final delivery via push notifications to an App. iOS app already written to receive the notifications/allow address book additions made up from phone numbers from incoming calls. So this is fusion, R-Pi, Azure, Hardware and iOS. Details to follow as this plan unfolds.

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  • Tab Sweep: Dynamic JSF Forms, GlassFish on VPS, Upgrading to 3.1.2, Automated Deployment Script, ...

    - by arungupta
    Recent Tips and News on Java, Java EE 6, GlassFish & more : • Dynamic forms, JSF world was long waiting for (Oleg Varaksin) • Creating a Deployment Pipeline with Jenkins, Nexus, Ant and Glassfish (Rob Terp) • Installing Java EE 6 SDK with Glassfish included on a VPS without GUI (jvm host) • GlassFish multimode Command for Batch Processing (javahowto) • Servlet Configuration in Servlet 3.0 api (Nikos Lianeris) • Creating a Simple Java Message Service (JMS) Producer with NetBeans and GlassFish (Oracle Learning Library) • GlassFish 3.1 to JBoss AS 7.1.1 EJB Invocation (java howto) • Tests In Java Ee For Zero-error Applications (Dylan Rodriguez) • Upgrading GlassFish 3.1.1 to 3.1.2 on Oracle Linux 6.2 64-bit (Matthias Hoys) • Migrating an Automated Deployment Script from Glassfish v2 to Glassfish v3 (Rob Terp) • Installer updates, Glassfish, Confluence and more…! (Rimu Hosting)

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  • After update, audio won't play throw hdmi cable

    - by ckhenderson
    Yesterday (June 7th) I faithfully updated a bunch of stuff through update manager (though I'm not sure what since I never read what I updated any more because I'm a bad person). Afterward, I discovered that I could no longer play audio through my tv via HDMI. The sound settings menu seems to have completely changed and the shell script that I wrote a week ago (with much pain and effort as I had never before written a shell script) to toggle between my laptop speakers and the HDMI cable output no longer works. When I type in pactl set-card-profile 0 output:hdmi-surround in the command line I get Failure: No such entity Presumably this means something with Pulse Audio changed but, while I'm learning a lot about the inner workings of Ubuntu/Linux, I'm not an expert and would love some help. EDIT: So I noticed that pacmd set-card-profile 0 output:hdmi-stereo seems to get everything working. Still, shouldn't there be a way to do this through the GUI as well?

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  • What is upcasting/downcasting?

    - by acidzombie24
    When learning about polymorphism you commonly see something like this class Base { int prv_member; virtual void fn(){} } class Derived : Base { int more_data; virtual void fn(){} } What is upcasting or downcasting? Is (Derived*)base_ptr; an upcast or downcast? I call it upcast because you are going away from the base into something more specific. Other people told me it is a downcast because you are going down a hierarchy into something specific with the top being the root. But other people seem to call it what i call it. When converting a base ptr to a derived ptr is it called upcasting or downcasting? and if someone can link to an official source or explain why its called that than great.

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  • Is there much difference between X86 Assembly language on Windows and Linux?

    - by Logan545
    I'm a complete beginner at Assembly, and my aim is to learn as much as I can to do with Assembly to one day I can reach expert level (I know I'm way off right now, but you never know). My only problem is this: I've got two books which both teach assembly, one on a Linux and the other on Windows. They are Jeff Duntemann's Assembly Language Step By Step (the linux one) and Introduction to 80x86 Assembly Language and Computer Architecture (the windows version). If I want to get the best out of assembly, should I do this on linux and windows? Also, is the syntax the same on Windows and Linux or will I have teach my self again when learning on the other OS( which is my main concern, I want to be able to use assembly on windows and linux).

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  • How much C/C++ knowledge is needed for Objective-C/iPhone development?

    - by BFree
    First, a little background. I'm a .Net developer (C#) and have over 5 years experience in both web development and desktop applications. I've been wanting to look into iPhone development for some time now, but for one reason or another always got side tracked. I finally have a potential project on the horizon, and I'm now going full steam ahead learning this stuff. My question is this: I haven't done any C/C++ programming since my schooling days, I've been living in managed land ever since. How much knowledge if any is needed to be successful as an iOS developer? Obviously memory management is something that I'll have to be conscious about (although with iOS 5 there seems to be something called ARC which should make my life easier), but what else? I'm not just talking about the C API (for example, in order to get the sin of a number, I call the sin() function), that's what Google is for. I'm talking about fundamental C/C++ idioms that the average C# developer is unaware of.

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  • How do you know when to change jobs? [closed]

    - by dustyprogrammer
    Possible Duplicate: When do you know it's time to move on from your current job? I have been working for a couple years now. I just want to know what people think about leaving one company for another, or to start looking around for other positions. I tend to use people's resumes as a guideline for when to change from one company to another. I am approaching, the time in my life where most of those people I look too, move away from their first position to pursue others. I know that isn't something good to base my decisions on what other do. I was wondering when is it time to move companies. I am currently happy at my position, and I am learning tons. Its just something I have been seeing a lot, I would like to get a feel for what people think. Thanks.

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  • Slide decks of Windows Phone 7 talk @ MoMo

    - by subodhnpushpak
    Hi, I presented a talk on Windows Phone 7 @ MoMo and got awesome response, even though WP7 is quite new still. I also demoed 2 applications on both emulator and the actual device. It enjoy the look on audience faces when they see the app actually work on actual device. I see a great opportunity on WP7 and everyone I met agrees on the fact the WP7 has a very bright future ahead. The Ecosystem which WP7 has (developing/ debugging tools, emulator, almost flat learning curve,  office/sharepoint integration a lively forum, marketplace) makes it a major player in mobile, already. Here is the slide – deck. Here are the details of the event. http://momodelhi11.eventbrite.com/#m_1_100 And here are few snap shots of the event. Windows Phone 7 Demo VIEW SLIDE SHOW DOWNLOAD ALL    Do provide your comments.

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  • How to study for an Informatics Olympiad [on hold]

    - by Cloud
    One of my goals for next year is to participate in the Australian Informatics Olympiad. As far as I'm aware, it is not too different from Informatics Olympiads in other countries. What would be the best way to study for this? What content should I pay particular attention to while learning in Python? I am currently using the book 'Learn Python the hard way', but are there any other books worthy of a mention? This is the link to their site: http://orac.amt.edu.au/aio/ It contains sample questions, so you can get an idea for the structure or nature of the competition. I know this isn't really a specific programming question, but it would be great if someone could share their experience or give some suggestions for me.

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  • How to improve programming skills?

    - by Mike
    I'm very new to programming. I started learning PHP about half a year ago, so I do know something. I can write small functions, I can export and import information from a database and I can make a website. I don't know OOP principles and I don't know about objects and classes. Should I move to OOP principles and learn about classes, methods and objects? If not, what should I do? Continue writing simple code? How can a programmer write his/her own API? Is OOP necessary to do this? So how can i improve my skills? I love programming. I spend my 24/7 on it, so any help will be appreciated.

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  • What Language is unity written in?

    - by John
    What Language is Unity written in? Also, where can i get its source code? I have an idea for a windowing enviroment or shell (dont know what to call it). What i want to do is teach myself to create it. i like some of several ideas i have seen, but i want to redo all of them, also the concept of how a desktop works. I figured learning the language Unity is written in, and studying Unity and Gnomes code would be a good start. i am on Ubuntu 12.04 acer aspire 5920 3 gb ram 160 gb hard drive

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  • Integrating Java webapps with Adobe Professional: Resources?

    - by Steve
    I'm interested in learning what resources there are for integrating Java and Adobe Professional, in general. If it helps, my projects already use the Spring Framework. My boss is particularly interested in being able to fill out a PDF form from within a Java webapp and have that data go directly to our database. She mentioned that .net had a lot of bridges to Adobe Professional. I would rather new projects be in Java so I am eager to find if there are any easy bridges between Java and Adobe Professional. Thanks in advance for any information. So far a Google search on "Java Adobe Professional" didn't turn up anything, so I thought I would ask here. Thanks.

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  • Do you enjoy 'Unit testing' ? [closed]

    - by jibin
    Possible Duplicate: How have you made unit testing more enjoyable ? i mean we all are developers & we love coding.I love learning new stuff(languages, frameworks, even new domains like mobile/Tablet development). But Testing ? As a newbie to the corporate environment,I just can't digest it.(We follow 'write-then-manually-test pattern').is it unit testing ?.Usually a single developer handles a module(From design to code & unit testing).So is it practical ? Somebody tell me how to make unit testing fun ? Or just How to do it properly?Do we try all possibilities manually.Say unit test for a webpage with lot of 'javascript validations'. PS:projects are all web applications.

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  • Trouble installing downloaded program

    - by Hamlette
    I purchased and downloaded Celtx and I'm having trouble installing it (in Ubuntu 13.04). I'm a Linux newbie (literally had it for four days) so please be kind and don't assume much experience with the command line, I'm still learning. The folder with all related files/packages etc. is under "Downloads" and I have tried several commands to try and install but I'm just not doing it right and would appreciate help with exactly what command(s) to use. Sudo apt-get install celtx did not work. I'm assuming I'm missing a step somewhere.

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  • Good Blog Software

    - by Darren Young
    Hi, Inspired from an earlier question regarding starting a blog, I have decided to start one myself. I only have 4 months commercial experience in C#, but I am hoping to use my blog as a tool for further learning. Maybe such things as researching and writing about a different design pattern each week, a tricky aspect of C# that I don't yet fully understand, etc, etc. My question is, can somebody recommend any good blog sites suited for writing text and code? Is there any that allow the use of code tags or similar for formatting? Thanks,

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  • Expressions that are idiomatic in one language but not used or impossible in another

    - by Tungsten
    I often find myself working in unfamiliar languages. I like to read code written by others and then jump in and write something myself before going back and learning the corners of each language. To speed up this process, it really helps to know a few of the idioms you'll encounter ahead of time. Some of these, I've found are fairly unique. In Python you might do something like this: '\n'.join(listOfThings) Not all languages allow you to call methods on string literals like this. In C, you can write a loop like this: int i = 50; while(i--) { /* do something 50 times */ } C lets you decrement in the loop condition expression. Most more modern languages disallow this. Do you have any other good examples? I'm interested in often used constructions not odd corner cases.

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  • What workflow engines are companies using and would you use it again? [on hold]

    - by cbmeeks
    I've been asked to find out "what's out there" when it comes to workflow engines. We have projects where a workflow based development environment makes sense. I've looked a little into jBPM but it seemed to have a steep learning curve. Google seems to take me to commercial products or products that I think are open source but instead have very limited "community editions". I could simply be searching for the wrong terms. What I would like to know are what actual workflow based products have you used at your company and to what degree of success or failure was it? Would you use it again? Thanks.

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  • Where to start, to develop an online Backgammon game?

    - by Matt V.
    I would like to develop a backgammon game to play against other players online, as a way of learning more Javascript/jQuery and a little game development. I'm a web developer and most of my experience is in PHP. I have minimal Javascript experience and no game development experience. Where should I start? Are there any particular books, tutorials, libraries, or frameworks that would help give me a jumpstart? As a beginner, am I better of using the DOM or Canvas?

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  • Breaking in to Programming

    - by Kevin
    I've noticed that there is a gap between getting formal education in computer science as a student and entry-level/junior programming jobs. Obviously entry-level programming requires that you know some programming but how much do you need to break in? I'm in a QA non-coding role with basically a minor in CS, looking to improve my own programming skills to eventually switch industries. However I'm completely at a loss as to what I should be focusing on learning and am curious as to the steps other people have taken to get experience post-undergrad.

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  • Microsoft Deal of the Day - 19/June/2012 - HTML5 Step by Step

    - by TATWORTH
    At http://shop.oreilly.com/product/0790145302083.do?code=MSDEAL, Microsoft Press are offering the HTML5 Step by Step e-book at 50% off."Experience learning made easy—and quickly teach yourself how to create Web pages with the HTML5 specification. With Step by Step, you set the pace—building and practicing the skills you need, just when you need them! Use a division-based layout to structure your Web pagesInclude menu bars and hyperlinks for clear navigationApply colors, font sizes, and other formatting with CSSAdd graphics, sound, and video to your pagesUse the Canvas tag to render visual images on the flyBuild user-input forms with buttons, boxes, and menus"

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  • To use Dart, the Java programmer has to work with 2 languages? [closed]

    - by Sridhar-Sarnobat
    When deciding on a technology to use for web apps, it's become a difficult choice between GWT and Dart and I am looking for guidance in deciding. GWT is a java programmer's dream because they don't have to learn a new language or have to worry about a separate IDE or extra plugin etc. GWT was sold using this value proposition - one didn't need to program in Javascript. But are Google making a U-turn and saying "go through the hassle of learning a new language" afterall? Or is it intended for there to be a Java to Dart compiler so that Java developers do not have to learn a new language? (this is not a rant, so I don't know why you are down-voting the question) Note: "the syntax is very similar" is not a justification. You could say why bother with GWT and just work with Java + Javascript directly.

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