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  • using static methods and classes

    - by vedant1811
    I know that static methods/variables are associated with the class and not the objects of the class and are useful in situations when we need to keep count of, say the number of objects of the class that were created. Non-static members on the other hand may need to work on the specific object (i.e. to use the variables initialized by the constructor) My question what should we do when we need neither of the functionalities? Say I just need a utility function that accepts value(s) and returns a value besed solely on the values passed. I want to know whether such methods should be static or not. How is programming efficiency affected and which is a better coding practice/convention and why. PS: I don't want to spark off a debate, I just want a subjective answer and/or references.

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  • Theme is broken in some places

    - by RidiculeSwarm
    I am using a computer that started out on 11.10. I have since updated it several times, and installed and used a great number of WMs (Unity, XFCE, Gnome, KDE, Cinnamon). I am not sure how, but somewhere along the way (probably when I upgraded to Ubuntu 13.04), some parts of my desktop theme were broken. I have tried switching themes and installing new themes, but that does not work. Neither did a removal of (and log out/login cycle) the ~/.config/dconf folder work. Specifically: on several menus, the central part of a button icon is a "grey square" that doesn't fit in with the theme (picture below). the window and desktop right click menus looks ugly. The same kind of grey field covers the items, and the square checkbox looks weird (just filled with a uniform blue). The separator is a thick line that looks out of place. It seems to be a similar problem to that of window buttons (picture below).

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  • Good message board for a website (e.g. phpBB)

    - by unixman83
    Hi, What are the best (and most widely used) message board softwares, and the pros and cons of each. e.g. Security Vulnerabilities, Performance on a cheap server, comes pre-packaged. I am looking for the best message board software for my website. A VPS can run almost any software, so the sky is the limit! Free, doesn't require unreasonable number of hyperlinks to their website Security focused / Widely Used, vulnerabilities are found and fixed quick Easy to keep up-to-date, i.e. prepackaged / auto-update in some way Moderator features [like pinning / message preamble], account management Themeable, customize appearance a bit

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  • Is it better to use a Database or a data structure for network stack?

    - by poly
    I've built a multi threaded messaging application in C and I'm currently using a MySQL Memory table to save the session ID, but I'm not sure whether this was a good decision or not. It works like this, the application sends a message and saves the source session ID in the MySQL table. When the application gets the success response it will remove the session's ID from the MySQL table, or if it received an error response then it will keep the ID to be retried later. I've built it this way so that I don't need to care about building a data structure by myself, and the Database provides flexibility when it comes to querying it. Do you think this is appropriate or do I need to use something else? Please note that the application is expecting to handle a large number of transactions/sec.

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  • What are the different ways of making a Joomla! website mobile friendly?

    - by Treebranch
    I am involved in the development of a number of Joomla! websites and we would like to make these websites mobile friendly. I have done a bit of searching online and I can't seem to find any standard way of doing this. I have have come across a few Joomla! extensions that claim to make themselves mobile friendly for this device or that device. However, I am weary to just start trying these out. Do any of you know of standard ways to make a Joomla! site mobile friendly?

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  • Can Agile/Scrum be used by 1 or 2 developers?

    - by Dillie-O
    Everything I've been reading and researching up to this point describes how Agile/Scrum works great with teams of about 4 to 6 members, maybe even more. In my current shop, we have about 8 developers or so, but given the nature of the volume of projects and the number of departments we support, we never have more than 1 or 2 folks assigned to a given project. Can I still use Agile/Scrum with a team of 1 or 2 developers? I'm working on making the pitch to my manager to start working with this methodology, but I need to be able to explain how to scale things back for a small developer crew, or convince them to make sure we get more members on a given project.

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  • chown select files only

    - by user114642
    I use the (excellant) unison to sync two file servers and I've just realised i've synced a number of files without using the switch in unison that maintains the file user ownership. these files now have a user of root (coz i have to run unison as root) Can I chown to a specified user BUT only change the files that now have the owner root and do so recursively in the directory in question? Sure i can but not sure of the arguments to "find files with owner 0 and change them to owner xxxx". THX for any help...

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  • Can't open display: :0

    - by empec
    I'm trying to get Nexus Mod Manager (Beta yet) working on wine, but after the configuration of NMM it crashes with an error. During the startup it spams alot of terminal stuff and at the end I find this error. ###!!! ABORT: Main-thread-only object used off the main thread: file /build/wine-mozilla-1.8/xpcom/base/nsCycleCollector.cpp, line 1166 ###!!! ABORT: Main-thread-only object used off the main thread: file /build/wine-mozilla-1.8/xpcom/base/nsCycleCollector.cpp, line 1166 Maximum number of clients reachederr:winediag:x11drv_init_thread_data x11drv: Can't open display: :0. Please ensure that your X server is running and that $DISPLAY is set correctly. Any suggestions? Thanks!

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  • Using Minified Page Specific JS [migrated]

    - by Mike C
    I've been working on a rather large scale project which makes use of a number of different pages with some very specific Javascript for each of them. To lessen load times, I plan to minify it all in to one file before deploying. The problem is this: how should I avoid launching page specific JS on pages which don't require it? So far my best solution has been to wrap each page in some additional container <div id='some_page'> ...everything else... </div> and I extended jQuery so I can do something like this: // If this element exists when the DOM is ready, execute the function $('#some_page').ready(function() { ... }); Which, while kind of cool, just rubs me the wrong way.

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  • Is there a phrase or word to describe an algorithim or program is complete in that given any value for its arguments there is a defined outcome?

    - by Mrk Mnl
    Is there a phrase or word to describe an algorithim or programme is complete in that given any value for its arguments there is a defined outcome? i.e. all the ramifications have been considered whatever the context? A simple example would be the below function: function returns string get_item_type(int type_no) { if(type_no < 10) return "hockey stick" else if (type_no < 20) return "bulldozer" else return "unknown" } (excuse the dismal pseudo code) No matter what number is supplied all possibiblites are catered for. My question is: is there a word to fill the blank here: "get_item_type() is ______ complete" ? (The answer is not Turing Complete - that is something quite different - but I annoyingly always think of something as "Turing Complete" when I am thinking of the above).

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  • Updates to Silverlight Code Browser

    A couple of bits of news. I did a number of updates to the HackingSilverlightCodeBrowser here:http://www.hackingsilverlight.net/HackingSilverlightCodeBrowser.html including things like MEF and IsolatedStorage. As to the community edition of the book, I'm still trying to get some contributors to finish. I've been slammed with 60 hour weeks so chapter 2 and 4 and appendix a still need edits. maybe a weeks worth of work pending time which tends to be limited in my life. :)...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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  • Progressing past CRUD applications in PHP?

    - by Anonymous -
    I've been programming in PHP for about a year and am at the following stage: Have a good 'feel' for the language Can create CRUD applications competently Can utilize an MVC structure to allow for future expansion of code Using the points listed above, I've created a number of my own applications for practise - including but not limited to; a forum, social network etc. My question may be a little vague but should hopefully be answerable. I feel as though there isn't anything else I would need to know about PHP to allow me to create websites, though I'm sure I'm wrong. What advanced/complex PHP topics could I look at that have a real-world use and will allow me to enhance both my skill as a programmer and applications in general? Recently I've looked a lot more at javascript/jQuery allowing me to give my applications a richer user interface which has been a great learning experience and proving very useful.

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  • Requirements Gathering Form?

    - by Daveo
    Do you use a standard form to gather requirements from a customer prior to making a website? If so what are the questions you ask? For example Purpose of Website: (sell products, reduce number of enquires, reduce work load, etc) Do you have you’re an existing logo? (can you send it via email) Do you have a preferred font for the website text? Do you have a colour theme for your logo, business cards, shop you would like to keep on the website Do you have photos you can provide of your Products? etc Ofcause it would need to be tweaked slightly for each customer but I was looking for a generic document as a baseline.

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  • Java EE/GlassFish Testimonials

    - by reza_rahman
    A key question to answer for Java EE and GlassFish centers on proof of successful adoption. To that end, we have made a serious effort to ask Java EE/GlassFish adopters to tell us their stories. There were a number of such stories shared at this year's GlassFish Community event at JavaOne. One that particularly stands out is a testimonial by celebrated Java EE advocate and independent consultant Adam Bien. For those of you that don't know it, Adam was given the "Top Java Ambassador" award by this year's JAX Innvovation Awards. See what Adam had to say here. We'll share more of these testimonials in days to come, so stay tuned.

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  • Ask the Readers: How Do You Find Your Next Book?

    - by Jason Fitzpatrick
    It’s never been easier to find book reviews, recommendations, and comparisons; tools which are more necessary than ever thanks to the increasing number of new titles on the market. This week we want to hear all about your techniques for picking your next book. Whether you consult the New York Times best seller list, pore over Amazon book reviews, use a book suggestion engine, or just buy whatever the local book store has on the end-cap display that month, we want to hear about your system for finding new books. Sound off in the comments with your technique (bonus points for including links to any services or sites you use) and then check back on Friday for the What You Said roundup to see how your fellow readers fill their book bags. Secure Yourself by Using Two-Step Verification on These 16 Web Services How to Fix a Stuck Pixel on an LCD Monitor How to Factory Reset Your Android Phone or Tablet When It Won’t Boot

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  • Fixing a bug that has never caused a problem until now.

    - by codeelegance
    I recently made a change that caused some code to be run far more often than it used to. This lead to the discovery of a bug. This bug had the potential to happen any time that code was run but because it was run so seldom it never surfaced. When I brought this to the lead developer's attention he wanted me to undo the change that exposed the bug rather than fix the bug quoting the adage, "If it ain't broke, don't fix it". Its clear to me that we were just lucky up until now but he won't listen to reason. Should I fix it anyway? Update The lead technically doesn't have any authority over me. Just tenure. He's been the sole developer on the project for a number of years until a year ago and I think he doesn't take constructive criticism very well. For what's worth, I didn't criticize him I just pointed out that just because the bug never showed up didn't mean it wasn't there.

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  • How do I convert screen coordinates to between -1 and 1?

    - by bbdude95
    I'm writing a function that allows me to click on my tiles. The origin for my tiles is the center, however, the mouse's origin is the top left. I need a way to transform my mouse coordinates into my tile coordinates. Here is what I already have (but is not working): void mouseClick(int button, int state, int x, int y) { x -= 400; y -= 300; float xx = x / 100; // This gets me close but the number is still high. float yy = y / 100; // It needs to be between -1 and 1 }

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  • I need advice on creating 3D walk cycles in XNA

    - by Zetar
    I want to purchase a number of 3D models from TurboSquid and animate them in an XNA game. I wrote a lot of games from 1985-1999 and have recently become involved with XNA. Now I would like to port one of my old games to the XBOX. I do have a background in 3D animation; but that was years ago. What is the current method for animating a walk cycle with a 3D model and using it inside XNA? Is there a book, software or a tutorial that you can recommend? Thanks in advance and sorry for such a broad and currently naive question.

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  • Issues with time slicing

    - by user12331
    I was trying to see the effect of time slicing. And how it can consume significant amount of time. Actually, I was trying to divide a certain work into number of threads and see the effect. I have a two core processor. So two threads can run in parallel. I was trying to see if I have a work w that is done by 2 threads, and if I have the same work done by t threads with each thread doing w/t of the work. How much does time slicing play a role in it As time slicing is time consuming process, I was expecting that when I do the same work using a two thread process or by a t thread process, the amount of time taken by the t thread process will be more Any suggestions?

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  • Vectors with Circles Physics -java

    - by Joe Hearty
    This is a problem I've been having, When making a set number of filled circles at random locations on a JPanel and applying a gravity (a negative change in the y), each of the circles collide. I want them to have collision detection and push in the opposite direction using vectors but i don't know how to apply that to my scenario could someone help? public void drawballs(Graphics g){ g.setColor (Color.white); //displays circles for(int i = 0; i<xlocationofcircles.length-1; i++){ g.fillOval( (int) xlocationofcircles[i], (int) (ylocationofcircles[i]) ,16 ,16 ); ylocationofcircles[i]+=.2; //gravity if(ylocationofcircles[i] > 550) //stops gravity at bottom of screen ylocationofcircles[i]-=.2; //Check distance between circles(i think..) float distance =(xlocationofcircles[i+1]-xlocationofcircles[i]) + (ylocationofcircles[i+1]-xlocationofcircles[i]) ; if( Math.sqrt(distance) <16)

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  • Java EE/GlassFish@Java2Days

    - by reza_rahman
    Java2Days 2012 was held in Sofia, Bulgaria on October 25-26. This was the third installment of the premier Java conference for the Balkan region, having three separate tracks for Java, the Cloud and Mobile. It attracted over a thousand enthusiastic, bright young developers and a number of world class speakers. There were no less than three full-house sessions on Java EE/GlassFish - one on Java EE 7, one on Domain-Driven Design using Java EE 6 and one on JSR 356/WebSocket. More details on Java EE/GlassFish@Java2Days, including slides and code examples, posted here.

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  • Implementing scrolling buttons in android

    - by Twirling Hearth
    I want to create an Android app in which the buttons scroll up or down the screen, kind of like a "wheel", so that when the "last" button is reached, it is simply followed seamlessly by the first one. I would want it to look something like the Price Is Right wheel. (This video at 0:12.) I want the first round of buttons to be presented for the user to tap the screen and make his choice, which would lead to a second round of buttons based on the first choice, and a third round based on the second choice. I've done a number of different google searches, but nothing so far. Any ideas?

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  • Cocos2d: Using single timer/scheduler for multiple sprites

    - by Shailesh_ios
    want to know if is it possible to use single timer or scheduler method for multiple sprites ? Like I am now working on a game and there could be any number of sprites and i want to perform some actions on all of that sprites, So do I have to use as many timers or schedulers as sprites ? Or How can the job be done using only a single timer or scheduler ? What is I schedule a method and use it for, Say 10 sprites ? Will it affect the performance..?

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  • What should be stored in UserContext?

    - by HonorGod
    From my general understanding I believe UserContext for a web application is supposed to hold user authentication and authorization (user roles) information. As part of user roles, there are definitions on who can access what data and accordingly the corresponding reference data is loaded into the UserContext as well. Is this a good practice to load and use reference data from UserContext? Does this have any impact with the number of sessions vs size of data it is holding inside JVM? I am thinking we use UserContext only for authentication and authorization but load the reference data from cache on demand and use it if required.

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  • Help with ubuntu 11 mis-displays

    - by Alfa9Dev
    So, I sea This tutorial, and I exectued this line in my terminal : sudo add-apt-repository ppa:lubuntu-desktop/ppa & sudo apt-get install lubuntu-desktop and my left-side panel changed abit, while the Dash Home changed to become like so : http://i43.tinypic.com/2vuc0lj.png ! help ! How can I change to the ubuntu default style or ppa ! because whene I run this : sudo add-apt-repository ppa:ubuntu-desktop/ppa it gives me the follwing notice : gpg: requesting key A1231595 from hkp server keyserver.ubuntu.com gpg: key A1231595: "Launchpad PPA for Ubuntu Desktop" not changed gpg: Total number processed: 1 gpg: unchanged: 1 does this mean that the ubuntu ppa isn't changed or what ?? Please, help any help would very appreciated :)

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