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  • Are certain problems solved more elegantly with AOP?

    - by Winston Ewert
    I've come across the idea of Aspect Oriented Programming, and I have some concerns with it. The basic idea seems to be that we want to take cross-cutting concerns which aren't well modularized using object and modularize them. That is all very fine and well. But the implementation of AOP seems to be that of modifying code from outside of the module. So, for example, an aspect could be written that changes what happens when a particular object is passed as a parameter in a function. This seems to go directly against the idea of modules. I should not be able to modify a module's behavior from outside of that module, otherwise the whole point of modules are overturned. But aspects seem to be doing exactly that! Basically, aspects seems to be a form of code patching. It may useful for some quick hacks; but, as a general principle perhaps its not something you want to do. Aspect Oriented Programming seems to me taking a bad practice and raising to a general design principle. Is AOP a good practice? Are certain programming problems solved more elegantly with AOP?

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  • compile error in Ubuntu 10

    - by yozloy
    Hey guys I got a vps which run solusVM. I'm now trying to install ruby 1.9.2 in it. I follow this guide: after I run this command apt-get update apt-get -y install build-essential zlib1g zlib1g-dev libxml2 libxml2-dev libxslt-dev I got this error below root@makserver:/usr/local/src/ruby-1.9.2-p0# apt-get -f install Reading package lists... Done Building dependency tree... Done Correcting dependencies... Done The following extra packages will be installed: libc6 Suggested packages: glibc-doc The following packages will be upgraded: libc6 1 upgraded, 0 newly installed, 0 to remove and 80 not upgraded. Need to get 0B/4252kB of archives. After this operation, 4096B disk space will be freed. Do you want to continue [Y/n]? y debconf: apt-extracttemplates failed: Bad file descriptor (Reading database ... 21594 files and directories currently installed.) Preparing to replace libc6 2.11.1-0ubuntu7.2 (using .../libc6_2.11.1-0ubuntu7.8_amd64.deb) ... open2: fork failed: Cannot allocate memory at /usr/share/perl5/Debconf/ConfModule.pm line 59 dpkg: error processing /var/cache/apt/archives/libc6_2.11.1-0ubuntu7.8_amd64.deb (--unpack): subprocess new pre-installation script returned error exit status 12 Errors were encountered while processing: /var/cache/apt/archives/libc6_2.11.1-0ubuntu7.8_amd64.deb E: Sub-process /usr/bin/dpkg returned an error code (1) Anybody can tell me how can I correct this. Thanks

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  • What is meant by, "A user shouldn't decide whether it is an Admin or not. The Privileges or Security system should."

    - by GlenPeterson
    The example used in the question pass bare minimum data to a function touches on the best way to determine whether the user is an administrator or not. One common answer was: user.isAdmin() This prompted a comment which was repeated several times and up-voted many times: A user shouldn't decide whether it is an Admin or not. The Privileges or Security system should. Something being tightly coupled to a class doesn't mean it is a good idea to make it part of that class. I replied, The user isn't deciding anything. The User object/table stores data about each user. Actual users don't get to change everything about themselves. But this was not productive. Clearly there is an underlying difference of perspective which is making communication difficult. Can someone explain to me why user.isAdmin() is bad, and paint a brief sketch of what it looks like done "right"? Really, I fail to see the advantage of separating security from the system that it protects. Any security text will say that security needs to be designed into a system from the beginning and considered at every stage of development, deployment, maintenance, and even end-of-life. It is not something that can be bolted on the side. But 17 up-votes so far on this comment says that I'm missing something important.

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  • What is the safest way to remove a swap partition?

    - by user212062
    I am running Ubuntu 12.04 on a 64-bit HP laptop with a 16 GB flash drive. I do not have a working hard drive right now. When I installed Ubuntu, I created a 2 GB swap partition on sdb1. I have since learned that swap partitions are generally a bad idea on flash drives, so I would like to use my swap space for my other partitions. You can see my partition scheme in the link below. I have read that I just have to comment sdb1 out of the fstab file, boot from a GParted live CD, select swapoff for sdb1, delete/merge with other partition, and everything's good. But, I've also read that messing with sdb1 can change the UUID of sdb2 or sdb3 and cause problems. Is this true? Does initramfs use swap at all? Also, when I get Ubuntu running on my laptop with an internal hard drive, does the swap partition help that much? I have 6 GB of DDR3. Does the rule of 1.5xActual RAM still apply? It seems like quite a bit to me. Thanks for the help! UPDATE: I have removed swap. The process I followed is: Right click swap partition in GParted and selected swapoff. Used # to comment the swap partition out of fstab. I tried to boot from a live GParted CD, but I kept getting an error, so I ran GParted in Ubuntu. Deleted swap partition in GParted. Unmounted /windows. Expanded /windows to take the remaining space. Mounted /windows. The / and /windows partitions each kept their own names and UUIDs, and everything is running fine. I have never seen any swap space being used before, and I don't intend to use the hibernate function, so I think removing swap was a good idea.

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  • Problem Installing Ubuntu 12.04 - [Errno 5]

    - by Rob Barker
    I'm trying to intall Ubuntu 12.04 to my brand new eBay purchased hard drive. Only got the drive today and already it's causing me problems. The seller is a proper proffesional company with 99.9% positive feedback, so it seems unlikely they would have sold me something rubbish. My old hard drive packed up last Tuesday and so i bought a new one to replace it. Because this was an entirely new drive i decided to install Ubuntu as there was no current operating system. My computer is an eMachines EM250 netbook. There's no disc drive so i am installing from a USB stick. The new operating system loads beautifully, and the desktop appears just as it should. When i click install i am taken to the installer which copies the files to about 35% and then displays this: [Errno 5] Input/output error This is often due to a faulty CD/DVD disk or drive, or a faulty hard disk. It may help to clean the CD/DVD, to burn the CD/DVD at a lower speed, to clean the CD/DVD drive lens (cleaning kits are often available from electronics suppliers), to check whether the hard disk is old and in need of replacement, or to move the system to a cooler environment. The hard drive can be heard constantly crackling. When i booted Ubuntu 12.04 from my old faulty hard drive as a test, i didn't even make it past the purple Ubuntu screen, so it can't be that bad. Any ideas? Message to the moderators. Please do not close this thread. I'm well aware there may be other threads on this, but i don't want it closing as the others do not provide the answer i am looking for. Thank you.

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  • any online service and/or application to develop a story line for an adventure game?

    - by Gajet
    I with a bunch of friend were talking about an adventure game. there will be too many possibilities in the game and the player can pick from wide varity of choices at each stage to do somthing. there will be consequences for each decision and they may or may not end the story. the result would be somthing like (picture from flashforward series S01E17)or if any of you watched hereos season 1 there is also similar time lines represented as strings in isaac mandez workshop. sorry for bad quality examples but right now I can't think of any better one. do you know any website or application which we can use to create the timeline? these features the least required ones: the ability to represent events as boxes. the ability to connect distant events to each other. the ability to move events on a scene freely the ability to expand the scene easily there should be some color options for the lines representing connections between events easily shareing the idea with one another it's much more better to have a WYSIWYG editor easily explore in the large scene of events in the end if you know any application which could let me create a board just like the one in my sample picture and share it whith other freinds it could help us a lot.

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  • Agile project management, agile development: early integration

    - by Matías Fidemraizer
    I believe that agile works if everything is agile. In software development area, in my opinion, if team members' code is integrated early, code will be more in sync and this has a lot of pros: Early integration helps team members to avoid painful merges. Encourages better coding habits, because everyone makes sure that they don't break co-workers' code everyday. Both developers and architects (code reviewers) may detect bad design decisions or just wrong development directions in real-time, preventing useless work. Actually I'm talking about getting the latest version of code base and checking-in your own code to the source control in a daily basis. When you start your coding day (i.e. you arrive to your work), your first action is updating your code base with the latest version from the source control. In the other hand, when you're about an hour to leave from your work and go home, your last action is checking-in your code to the source control and be sure that your day work doesn't break the project's build process. Rather than updating and checking-in your code once you finished an entire task, I believe the best approach is fixing small and flexible personal milestones and checking-in the code once you finish one of these. I really believe that this coding approach fits better in the agile project management concept. Do you know some document, blog post, wiki, article or whatever that you can suggest me that could be in sync with my opinion?. And, do you find any problem working with this approach?. Thank you in advance.

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  • Turn-based Client-Server Card Game - Unicast (TCP) or Multicast (UDP)

    - by LDM91
    I am currently planning to make a card game project where the clients will communicate with the server in a turn-based and synchronous manner using messages sent over sockets. The problem I have is how to handle the following scenario: (Client takes it turn and sends its action to server) Client sends a message telling the server its move for the turn (e.g. plays the card 5 from its hand which needs to placed onto the table) Server receives messages and updates game state (server will hold all game state). Server iterates through a list of connected clients and sends a message to tell of them change in state Clients all refresh to display the state This is all based on using TCP, and looking at it now it seems a bit like the Observer pattern. The reason this seems to be an issue to me is this message doesn't seem to be point-to-point like the others as I want to send it to all the clients, and doesn't seem very efficient sending the same message in that way. I was thinking about using multicasting with UDP as then I could send the message to all the clients, however wouldn't this mean that the clients would in theory be able to message each other? There is of course the synchronous aspect as well, though this could be put on top of the UDP I guess. Basically, I would like to know what would be good practice as this project is really all about learning, and even though it won't be big enough to encounter performance issues from this I would like to consider them anyway. However, please note I am not interested in using message oriented middleware as a solution (I have experience with using MOM and I'm interested in considering other options excluding MOM if TCP sockets is a bad idea!).

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  • What You Said: How You Find New Books

    - by Jason Fitzpatrick
    Earlier this week we asked you to share your tips and tricks for finding fresh books to enjoy. Now we’re back with tips ranging from the old school to the digital. SJ highlights several of the most popular web-based tools for finding new books: Goodreads.com is quick and easy. Yournextread.com is fun and helps a lot. But I gotta be honest, Amazon’s suggestions are probably the most useful to me. TheFu suggests checking out award-winning lists and one rather quirky way to pick a good Sci-Fi book: For scifi, see Hugo winning books. Life is too short to read bad books. Sometimes that leads to an author with an entire series of books to enjoy. I really enjoy some of the scifi from the 40s and 50s. Wells stuff is always timeless too (and free). I’m less happy with Nebula winners–-different type of writers and not my personal taste. 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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  • A Modern Marketing Marvel: Eloqua Experience 2013

    - by kristin.jellison
    Hey there, partners— You’d be hard pressed to find a more convincing example of modern marketing than the one that descended upon San Francisco last week. We’re talking about Eloqua Experience 2013, of course. It is remarkable that a marketing technology conference has become a case study in successful 21st-century marketing practices. Eloqua Experience 2013 (#EE13) was all about customer-focused, targeted messaging, multichannel content, analytics and real-time multiscreen engagement. It made for a busy, yet interactive experience for over 2,000 eager attendees. This year’s event brought together some of the world’s most innovative marketers for three days of immersive sessions covering marketing best practices, customer stories and deep-dive technical classes. With 70 breakout sessions, product announcements, and a special conversation with Vince Gilligan, creator and executive producer of “Breaking Bad,” #EE13 brought a lot of critical marketing news to light. Oracle’s goal: to make sure our partners stay updated. As you know, Eloqua joined Oracle in late 2012, further rounding out our Customer Experience applications platform. Eloqua is a marketing automation solution and marketing cloud centerpiece that partners can use to target the right buyers, easily execute campaigns, bring leads to sales and bring in high ROIs. The resources below will help you stay on top of the industry’s best practices for marketing, plus all the advantages Eloqua can bring to partners. Partner Opportunities and Strategy with Eloqua The latest Eloqua partner strategy. Interview with Oracle Eloqua GM Kevin Akeroyd on Eloqua Experience A short recap of 2013’s Experience. Eloqua Product Announcements John Stetic, VP of Products for Oracle Eloqua, highlights the top product news, including a new profiler app and the ability to integrate display advertising into multichannel campaigns. Eloqua Experience Highlight Reel See what all the bustle was about. Eloqua Experience Session Overviews A quick look at what the keynote and breakout sessions covered, with links to session content. Modern Marketing Essentials Library Tips, blueprints, and strategies for success based on the 5 Tenets of Modern Marketing. Over and out, Your OPN Marketing Allies

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  • How should I host our scalable worker processes?

    - by Pieter Breed
    We are designing a new architecture for an enterprise business. The principles we've followed so far is not to develop what you can (possible buy and) deploy, ie, don't reinvent any wheels. In this way we've decided on CQRS, RabbitMQ, Riak and a bunch of other things. We still need to write /some/ business code though and these will be in the form of worker processes, which will consume commands from a message queue and after any side-effects, produce events onto another message queue. The idea behind this is that via the competing-consumers design we will have a scalable design right out of the box. One option is of writing a management infrastructure that will know how to: deploy code instantiate processes kill processes update configuration etc IE provide fault tolerance and scalability. Also, this is exactly what something like GAE and Heroku does for you, but in a public setting and in our organization, public is bad. My question is, is there an out-of-the-box solution that we can use to host our consumers in? Like a private cloud or private platform-as-a-service. Private Heroku or GAE. Is there some kind of software or software product with which we can do all of these things and thereby get scalability and fault tolerance over our consumers?

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  • Am I wrong to disagree with A Gentle Introduction to symfony's template best practices?

    - by AndrewKS
    I am currently learning symfony and going through the book A Gentle Introduction to symfony and came across this section in "Chapter 4: The Basics of Page Creation" on creating templates (or views): "If you need to execute some PHP code in the template, you should avoid using the usual PHP syntax, as shown in Listing 4-4. Instead, write your templates using the PHP alternative syntax, as shown in Listing 4-5, to keep the code understandable for non-PHP programmers." Listing 4-4 - The Usual PHP Syntax, Good for Actions, But Bad for Templates <p>Hello, world!</p> <?php if ($test) { echo "<p>".time()."</p>"; } ?> (The ironic thing about this is that the echo statement would look even better if time was a variable declared in the controller because then you could just embed the variable in the string instead of concatenating) Listing 4-5 - The Alternative PHP Syntax, Good for Templates <p>Hello, world!</p> <?php if ($test): ?> <p><?php echo time(); ?> </p><?php endif; ?> I fail to see how listing 4-5 makes the code "understandable for non-PHP programmers", and its readability is shaky at best. 4-4 looks much more readable to me. Are there any programmers who are using symfony that write their templates like those in 4-4 rather than 4-5? Are there reasons I should use one over the other? There is the very slim chance that somewhere down the road someone less technical could be editing it the template, but how does 4-5 actually make it more understandable to them?

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  • Adding complexity by generalising: how far should you go?

    - by marcog
    Reference question: http://stackoverflow.com/questions/4303813/help-with-interview-question The above question asked to solve a problem for an NxN matrix. While there was an easy solution, I gave a more general solution to solve the more general problem for an NxM matrix. A handful of people commented that this generalisation was bad because it made the solution more complex. One such comment is voted +8. Putting aside the hard-to-explain voting effects on SO, there are two types of complexity to be considered here: Runtime complexity, i.e. how fast does the code run Code complexity, i.e. how difficult is the code to read and understand The question of runtime complexity is something that requires a better understanding of the input data today and what it might look like in the future, taking the various growth factors into account where necessary. The question of code complexity is the one I'm interested in here. By generalising the solution, we avoid having to rewrite it in the event that the constraints change. However, at the same time it can often result in complicating the code. In the reference question, the code for NxN is easy to understand for any competent programmer, but the NxM case (unless documented well) could easily confuse someone coming across the code for the first time. So, my question is this: Where should you draw the line between generalising and keeping the code easy to understand?

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  • Working with a company as a Junior Developer [closed]

    - by user1601973
    We all have started our careers in some way or other. Well, I am a college student based in North America & I am doing my second internship with the same company with which I did my first internship. I came back here because people here were helpful always and supportive. But it just happened today, and I wanted to share this on SO. Well since I started I have been doing documentation and that kind of stuff only as compared to my first internship in which I actually worked along with the developers & learned so many things. Well, I was in a conversation with my Team lead, and he asked me if I completed that particular work or not? Well, That particular work had slipped from my mind. He was indeed I kind of pissed, and said "You don't have to worry about it, I will figure out". Well, I felt so bad and was about to literally cry. I stopped my lunch and then went on to complete that work. I always ask for work in office, and I always try to be an asset for whoever I am working but this was the first time that it happened. What are your thoughts on this and should I apologise or not? I think I should.

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  • Battery is drained too quickly

    - by LucaB
    I'm getting really low battery life under ubuntu, not even close to windows. I tried powertop, and I saw that my laptop is consuming in idle nearly 20 watts (a bit more). I tried to install laptop-mode-tools, change "good" into "bad" in powertop, but nothing changes. I see that I have the the HD audio output device which is running at 100% every time. Could this be the problem? This is a report from powertop. The battery reports a discharge rate of 22.8 W The estimated remaining time is 33 minutes Summary: 381.8 wakeups/second, 0.0 GPU ops/second and 0.0 VFS ops/sec Usage Events/s Category Description 3.2 ms/s 182.7 Timer tick_sched_timer 100.0% Device Audio codec hwC0D3: Intel 7.9 ms/s 25.1 Process /usr/bin/X :0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch -background no 1.9 ms/s 24.2 Interrupt [6] tasklet(softirq) 2.9 ms/s 23.2 Process /usr/lib/chromium-browser/chromium-browser --type=zygote 8.1 ms/s 20.3 Process /usr/lib/unity/unity-panel-service 0.7 ms/s 17.4 Timer hrtimer_wakeup 4.2 ms/s 12.6 Process unity-2d-panel 604.4 µs/s 9.7 Process syndaemon -i 2.0 -K -R -t 149.7 µs/s 9.7 kWork ieee80211_iface_work 0.8 ms/s 8.7 Process metacity 19.5 ms/s 1.0 Process powertop 3.0 ms/s 6.8 Process //bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session 699.0 µs/s 6.8 Process /usr/lib/thunderbird/thunderbird 4.3 ms/s 4.8 Process gnome-terminal 658.9 µs/s 2.9 Interrupt [1] timer(softirq) 75.1 µs/s 2.9 kWork iwl_bg_run_time_calib_work 163.8 µs/s 1.9 Process /usr/lib/accountsservice/accounts-daemon 70.6 µs/s 1.9 Process [ksoftirqd/2] 25.8 µs/s 1.9 Process [ksoftirqd/0] 1.0 ms/s 1.0 Process /usr/bin/python /usr/sbin/powernapd 408.2 µs/s 1.0 Process unity-2d-shell 189.8 µs/s 1.0 Process /usr/lib/chromium-browser/chromium-browser 124.4 µs/s 1.0 Process /usr/lib/unity-lens-applications/unity-applications-daemon 113.3 µs/s 1.0 Process /usr/lib/gnome-settings-daemon/gnome-settings-daemon 112.0 µs/s 1.0 Process nautilus -n 104.9 µs/s 1.0 Process /usr/lib/gvfs/gvfsd-trash --spawner :1.2 /org/gtk/gvfs/exec_spaw/0 77.5 µs/s 1.0 Process /usr/lib/x86_64-linux-gnu/colord/colord 75.6 µs/s 1.0 Process /usr/lib/gvfs/gvfs-gdu-volume-monitor 75.0 µs/s 1.0 Interrupt [53] i915 74.9 µs/s 1.0 Process /usr/lib/gvfs/gvfs-afc-volume-monitor What should I do to make the battery consumption lower?

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  • Problems installing Ubuntu server and desktop

    - by Rufus
    google translate Good afternoon I'm new to linux, I have to install a proxy and to them I decided on Ubuntu, the problem is that it took several days trying to install Ubuntu on any version and when installing i get error [Errno 5] input / output error says that is because the disc (cd or dvd) is bad or faulty change it and save all denuevo but I get the same error try changing the hard drive to see if my drive had no problem and I also get the same error , the machine where I want to mount the Ubuntu is a P4 with 1GB rAM and 40GB disk is more than the minimum requirements for even so I get the error ... I would like someone could help me thank you very much ..... original Problemas al instalar Ubuntu server y desktop Buenas tardes soy nuevo en linux, tengo que instalar un proxy y para ellos me decidi por Ubuntu, el problema es que llevo varios dias tratando de instalar Ubuntu en cualquiera de sus versiones y al momento de instalar me sale error [Errno 5] input/output error dice que se debe a que el disco (cd o dvd) esta malo o defectuoso lo cambie y grabe todo denuevo pero me sale el mismo error trate de cambiar el disco duro para ver si no tenia problema mi disco y tambien me sale el mismo error, la maquina donde quiero montar el Ubuntu es un p4 con 1gb ram y disco de 40gb, es mas de los requerimientos minimos por aun asi me sale el error... me gustaria que alguien me pudiera ayudar muchas gracias.....

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  • from MS Biology to BS Computer Science [on hold]

    - by Air Borne
    I'm Marco from Italy and I'd like to ask you a piece of advice about my career. I hold a Ms degree in Biology, I enjoyed a lot studying it and I got very good grades but I didn't know what to do with my degree in the real life. Few months ago, I began to read a book about Python programming (Introduction to Computer Science, Zelle J.) and I've great fun learning Python as a beginner, I wake up in the morning thinking about doing excersies and writing simple programs with python :) I'm also watching free lectures from MIT open courseware, and I'm feeling a certain degree of regrets for never asking myself what was computer science, since it seems to me it's a magic world. After weeks of doubts, I made a move :) I applied for a CS bachelor degree abroad, I got an interview and I'm going to start this great adventure next September. I feel incredibly excited at it, but a little bit scared too. Scared because sometimes I think I'm making a great mistake for my life restarting from a bachelor in a completely different area of study. Sometimes I hear people saying the IT market is bad, sometimes I hear other ones saying quite the opposite instead. Moreover, some colleagues of mine suggested me to try to get into Bioinformatics, instead of CS. My question is: I want to really discover if CS is for me, I mean the passion of my life. I know I'm just a beginner and I can't say nothing about it yet. What do you suggest me: CS or Bioinformatics? If I get a Bs in CS, could I get into bioinformatics without relevant experience, taking into account I have a Ms Biology degree? Any comment is appreciated, thanks in advance.

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  • 2011 Tech Goal Review

    - by kerry
    A year ago I wrote a post listing my professional goals for 2011.  I thought I would review them and see how I did. Release an Android app to the marketplace – Didn’t do it.  In fact, haven’t really touched Android much since I wrote that.  I still have some ideas but am not sure if I will get around to it. Contribute free software to the community – I did do this.  I have been collaborating with others via github more lately. Regularly attend a user group meetings outside of Java – Did not do this.  Family life being what it is makes this not that much of a priority right now. Obtain the Oracle Certified Web Developer Certification – Did not do this.  This is not much of a priority to me any more. Learn scala – I am about 50/50 on this one.  I read a few scala books but did not write an actual application. Write an app using JSF – Did not do this.  Still interested. Present at a user group meeting – I did a Maven presentation at the Java user group. Use git more, and more effectively – Definitely did this.  Using it on a daily basis now. Overall, I got about halfway on my goals.  It’s not too bad since I did do a few things that weren’t on my list. Learned to develop applications using GWT and deploy them to Google App Engine Converted one of my sites from PHP to Ruby / Sinatra (learning to use it in the process) Studied up on the HTML 5 features and did a lot of Javascript development

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  • What does "fully supported" mean in context of Radeon Opensource Video Driver?

    - by stevecoh1
    UPDATE: This is not a request for support of my specific issue. Details of that issue are here: How to recover from bad upgrade to 13.04 (Unity very slow) . I have "solved" that issue, for the time being anyway, by loading alternative lighter weight desktops. This question was opened specifically to question the meaning of the documentation at https://help.ubuntu.com/community/RadeonDriver . END OF UPDATE There it is, in Black and White: https://help.ubuntu.com/community/RadeonDriver Fully Supported All these Radeon(HD) cards and derivatives have good 3D acceleration support. This is not an exhaustive list: ... RV610/RV630 Radeon HD 2400/2600/2700/4200/4225/4250 Yet in my case (the HD2400) this proves to be manifestly untrue, at least if "Fully Supported" means sufficient to run Unity in Ubuntu 13.04. It runs all the applications I can launch under Unity, but Unity itself is unbearably slow. It's quite striking really. Click on the "Dash" - go get a cup of coffee. Type a key in the Unity search box, wait five seconds for it to appear. Type Alt-tab and wait five seconds for the screen to finish painting. None of these issues appear outside of Unity components. As you all know, there are complaints about slow performance all over the Internet about Unity. Shouldn't this page somehow address this issue? Especially if "fully supported" doesn't mean sufficiently to run the default modern Ubuntu release. What does "fully supported" mean?

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  • Is there ever a reason to do all an object's work in a constructor?

    - by Kane
    Let me preface this by saying this is not my code nor my coworkers' code. Years ago when our company was smaller, we had some projects we needed done that we did not have the capacity for, so they were outsourced. Now, I have nothing against outsourcing or contractors in general, but the codebase they produced is a mass of WTFs. That being said, it does (mostly) work, so I suppose it's in the top 10% of outsourced projects I've seen. As our company has grown, we've tried to take more of our development in house. This particular project landed in my lap so I've been going over it, cleaning it up, adding tests, etc etc. There's one pattern I see repeated a lot and it seems so mindblowingly awful that I wondered if maybe there is a reason and I just don't see it. The pattern is an object with no public methods or members, just a public constructor that does all the work of the object. For example, (the code is in Java, if that matters, but I hope this to be a more general question): public class Foo { private int bar; private String baz; public Foo(File f) { execute(f); } private void execute(File f) { // FTP the file to some hardcoded location, // or parse the file and commit to the database, or whatever } } If you're wondering, this type of code is often called in the following manner: for(File f : someListOfFiles) { new Foo(f); } Now, I was taught long ago that instantiated objects in a loop is generally a bad idea, and that constructors should do a minimum of work. Looking at this code it looks like it would be better to drop the constructor and make execute a public static method. I did ask the contractor why it was done this way, and the response I got was "We can change it if you want". Which was not really helpful. Anyway, is there ever a reason to do something like this, in any programming language, or is this just another submission to the Daily WTF?

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  • Chainloading GRUB2 from BURG

    - by WindowsEscapist
    I have an old PC with Puppy Linux in addition to Ubuntu and Windows XP. THis creates a LOT of menu entries (all of which I would like to keep): Ubuntu 10.04 Ubuntu Recovery Mode Memtest x86 Memtest Serial Windows XP Pro Precise Puppy Linux Precise Puppy TORAM Puppy 4.3.1 Puppy 4.3.1 TORAM Plop Boot Manager (for booting to USB, PC doesn't have BIOS option). Now, in my fancy shiny laptop I've gotten really attached to BURG, and would like a setup where I have a Windows icon, an Ubuntu icon, and an arrow that chainloads GRUB2 so that I can boot from USB or run Puppy if need be (all these entries will obviously not fit into the BURG theme I use, Lightness). The problem is, GRUB2 can't install the the beginning of a partition like it used to be able to (I am reluctant to specify andything with --force at the end), at least, without warning that warn: This is a BAD idea!. So I'm kind of at a loss here. I can't see how the folding option would work, because all of those other options would have the same icon once I unfolded (Lightness is non-text-based). If I do embed GRUB using grub-install /dev/sdax --force, how do I chainload it with BURG? Is there another way?

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  • Explicitly pass context object versus injecting with IoC

    - by SonOfPirate
    I have a layered service application where the service layer delegates operations into the domain layer for execution. Many of these operations need to know the context under which they are operation. (The context included the identity of the current user, culture information, etc. received from the caller.) For example, I have an API method that returns a list of announcements. The list is based on the current user's role and each announcement is localized to their culture. The API is a thin-facade that delegates to an Application Service in my domain layer. The Application Service method obviously needs to know the context of the current request/operation as another call to the same API from another user should result in a different list. Within this method, we also have logging that uses some of the context information so we a clear understanding of the context when the operation was performed (this is especially useful if something goes wrong.) While this is a contrived example, in the real world, my Application Services will coordinate operations with many collaborative components, any number of them also needing the context information. My choice is to pass the context to the Application Service which would then pass it with any calls to collaborators or have the IoC container satisfy the dependency the Application Service and any collaborators have on the context. I am wondering if it is considered good/bad, best practices/code smell, etc. if I pass the context object as a parameter to the domain methods or if injecting the context via an IoC container is preferred. (EDIT: I should mention that the context object is instantiated per-request.)

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  • Can't shutdown Ubuntu (Wubi Installation)

    - by zsgre3nd3s7
    I downloaded Ubuntu 12.04 using Wubi. The installation went correctly and everything was working fine until I tried to shutdown. I clicked shutdown and then Ubuntu started shutdown, but as soon as I saw the Ubuntu logo with blank dots under, it froze. I had to perform a hard shutdown. After booting my computer back and going into Ubuntu, I tried shutting it down again but this time it took me on a black page with lots and lots of log writing on the screen and after a little while, it stopped writing stuff. I was able to input characters using the keyboard and everything, but it never shutdown. I had to perform a hard shutdown again. Now it always gives me a Ubuntu logo and freezes. What should I do? I know hard shutdowns are bad and want to avoid them. Is there anyway to make shutdowns work? I tried a reboot and it also froze on the Ubuntu logo. Sony VAIO Model E SVE17115FDB Laptop. Graphic card - AMD RADEON HD 7650M (and it installed correctly in Ubuntu). BIOS - H2O Bios. Processor - Intel i7-3612QM. Edit: I only installed the AMD/ATI proprietary drivers FGLRX, not the AMD/ATI post release drivers because they keep showing an error message. Here is jockey.log. Edit 2: Here is the log that i mentioned before that appeared on my screen, it appeared after i tried reinstalling my AMD driver but failed so i reinstalled the other one. Sorry for the quality i took those pictures with my phone.

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  • JavaScript loaded external content SEO

    - by user005569871
    I wonder what is the best way to have Javascript loaded content indexed by search engines. I know that search engines don't execute Javascript, but I am thinking more of an progressive enchantment. I am creating a responsive website, and on the home page I will have some sections about most visited products and recommended product that I plan to load depending on the device detected. These products will be in sliders with thumbnail images and names of the products. If mobile is detected slider content will not load, ant the link to the external page will be shown. I know that external content will be indexed via link to those resources. Where will the users be directed from search in this case? To the external page or home page? Will it be bad for SEO if I show only product names on front page so they can be indexed and hide them with CSS? What is the best way to index that content and possibly direct users from search to home page? Also, i've seen the Ajax crawling but iI would like not to use that if there is any better way.

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  • Changing website Url - Am I making an SEO mistake

    - by Denis
    I have a webiste with a .com domain that is a year old. The business is a shop based in Ireland and I have purchased a .ie domain. I plan to move the website over to the new domain, SEO Good or Bad idea? Old Url - SmythsOfTerenure.com | New Url - SmythsComputerRepair.ie (I am using Fake names and fictional business in the example Url's) The new domain has my main keyword in it. The old domain has my family name and business location (city district) It currently ranks high for lots of relevant keywords in Google with low traffic and low competition. Current website traffic is about 80 session per week. 80% of that traffic is Organic from Google. I am changing domain in an attempt to help SEO long term by having a CC TLD (.ie rather than .com) and having my main Keyword in the domain. I plan to do 301 re-directs from old to new and update GW Tools and G Analytics but am I making a mistake changing it at all as I know rankings may fall in the sort term. Homepage PR=0 and very few inbound links. Should I just leave it on the old domain? Or after a few months should I be back up ranking as well as I am now?

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