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• Should I be concerned that I can't program very fast without Google? [closed]

  - by seth

  Possible Duplicate: Google is good or bad for programmer? I'm currently in college to be a software engineer, and one of the main principles taught to us is how to learn for ourselves, and how to search the web when we have a doubt. This leads to a proactive attitude - when I need something, I go get it. Recently, I started wondering how much development would I be able to do without internet access and the answer bugged me quite a bit. I know the concept of the languages and how to use them, but I was amazed by how "slow" things were without having the Google to help in the development. Most of the problems I have are related to specific syntax. For example, reading and writing to a file in Java. I have done this about a dozen times in my life, yet every time I need to do it, I end up googling "read file java" and refreshing my memory. I completely understand the code and fully understand what it does, but I am sure that without Google it would take me a few tries to get the code correct. Is this normal? Should I be worried and try to change something in my programming behaviour?

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• nautilus will not start, no right click menu, apps will not run due to 64bit libicui18n.so.48 overwritten with 32bit, ubuntu 12.04

  - by Dewb

  yeah so i broke my system trying to install support for 32bit apps. Somehow the 32bit set of libicu*.so.48 files replaced my 64bit files and now nothing works. I know what the problem is and how to fix it , what i need is some help. I need some kind soul running a 64bit install of Ubuntu 12.04 to simply go into their /usr/lib dir and copy the files that have the form libicu*.so.48* (8 of them i think, maybe 16 i dunno how many there is supposed to be since they were overwritten). Anyway if you could put those files in an archive, zip or tar preferred and then email/share the link. I was able to get these files installed but they're from the latest edition of fedora and while i can now use my computer , it's not that stable things don't start right smoothly every time like they used to .... and well its a simple ordeal to put things back the way they were if someone wouldn't mind helping out. also any help setting up the libraries related to 32bit apps would be great as well as i apparently screwed that up royally. Thanks for any help or advice

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• Test JPQL with NetBeans IDE 7.3 Tools

  - by Geertjan

  Since I pretty much messed up this part of the "Unlocking Java EE 6 Platform" demo, which I did together with PrimeFaces lead Çagatay Çivici during JavaOne 2012, I feel obliged to blog about it to clarify what should have happened! In my own defense, I only learned about this feature 15 minutes before the session started. In 7.3 Beta, it works for Java SE projects, while for Maven-based web projects, you need a post 7.3 Beta build, which is what I set up for my demo right before it started. Then I saw that the feature was there, without actually trying it out, which resulted in that part of the demo being a bit messy. And thanks to whoever it was in the audience who shouted out how to use it correctly! Screenshots below show everything related to this new feature, available from 7.3 onwards, which means you can try out your JPQL queries right within the IDE, without deploying the application (you only need to build it since the queries are run on the compiled classes): SQL view: Result view for the above: Here, you see the result of a more specific query, i.e., check that a record with a specific name value is present in the database: Also note that there is code completion within the editor part of the dialog above. I.e., as you press Ctrl-Space, you'll see context-sensitive suggestions for filling out the query. All this is pretty cool stuff! Saves time because now there's no need to deploy the app to check the database connection.

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• HDMI & Display Port stopped work on 11.10

  - by dizzy

  After upgraded two laptops to 11.10, HDMI and Display ports stopped to work. Symptoms on each (btw. it used to work with 11.04 on both): laptop Dell Inspiron 1525 (HDMI, Intel GMX 3100): after HDMI cable is plugged in, screen is corrupted (no panel, no icons), system is unresponsive, TV set receives some signal, but only blue screen and some regular ticks can be heard. Unplugging the cable system recovers. No logs were checked. Thinkpad W510 (DisplayPort, NVidia). Simple "Screens" utility does not recognizes TV set, but this is something to do with the differences between Nvidia driver API and the one expected from the utility, as far I could spot on the net. However, using Nvidia-settings, TV is recognized, but cannot be enabled and used. Beside that, touch pad freezes after HDMI2DisplayPort connector is plugged in the laptop (not immediately, but after few seconds - probably after some handshake with the TV set crashes). It is strange that no such bug reports can be found on the net. So, I guess it is something wrong on our laptops only, but would appreciate some hints (i.e. any known changes recently related to HDMI, Display Port, X-Windows, kernel... wherever I should take a look and fix the issue).

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• No text in working indicator-messages after enabling different icons depending on the status

  - by user106750

  My indicator-messages has some problems. As you can see in the image, there appears no text. The indicator is working correctly, if there is some income, a number will appear in its proper place or I will be able to see the minutes passed after I got an email, but still no information. As you can see in the picture, I changed the envelope icon for the status one. I configured it as is indicated in http://www.omgubuntu.co.uk/2012/08/ubuntu-add-new-message-indicator-icons, with the indicator changing depending on the status. But I modified it so I see the bubble. The bubble gets the arrow when I'm absent, for example, or an "X" of I'm disconnected, and also turns blue if there an income. I believe the problem is related with this new indicator. The first days, it was working fine, but then the text dissapeared. I've tried uninstalling and reinstalling the packet, with no success. I'm using ubuntu 12.10 64bits with Unity. Someone has an idea how to fix this? I would prefer conserving the characteristic of having different icons. Thanks a lot!!! Image here: http://i.stack.imgur.com/Ucgi4.png

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• 2 year cis degree and in school for computer science what can I do?

  - by chame1eon

  Hi I am 29 and have a recent 2 cis year degree from a community college , an A+ certification , and meager experience with web stuff ( Java , Javascript , php ) while in my 1 year help desk internship. In all the programming classes I was able to blow through the homework easily even while other students were panicking and dropping. I think I have managed to avoid the most atrocious noob/self taught mistakes ( spaghetti code etc) by just doing research before starting something and trying to keep good design in mind. Even so I'd have to make heavy use of references to crawl through even simple projects that would result in fully finished useful applications. I need a job now and I am tired of the slow pace of the classes and would love to get any kind of practical experience I could. The problem is that I am not sure what I should be trying to do. I have a very strong preference for application programming or at least anything light on design and preferably pretty low level. If I can't do that then anything technology related , for example help desk would be better than nothing. I live near Raleigh NC. Am I qualified for anything that could contribute to coding (C++ or Java ) experience or even web development though I don't really like it. Would web development experience help. If not is there anything I could read or do that could help? Is the help desk my only choice? If it is, are there any relatively quick certifications or anything similar that would help while I am waiting? Sorry about the long multi-part question. Thanks for reading.

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• How can I speed up boot on one of my machines?

  - by Korneel Bouman

  I have a Gateway all in one machine (2 gig Intel Core 2 Duo T7250 dual core processor, 2 gig RAM - full specs) on which I installed 10.10. Once it has booted it's fine, but it takes forever to boot. This is what happens: 1. Boot starts with cursor flashing for about 10-15 seconds 2. Cursor disappears for 1.5 - 2 minutes 3. Cursor reappears, blinks a few seconds more, boot finishes in another 10 seconds 4. Login screen I have another machine with marginal better specs that boots up in no time (basically the above minus the two minute delay). Things I've done: enabled verbose mode for grub nothing is showing until after 2 minute pause. checked syslog last message before pause is a message from alsa saying the process is already running (or something similar... going from memory here...) It could be something sound related as the built in speakers are not working (sound card is recognized though and headphones work). Anyway, it's not the end of the world, but it's annoying and I'd like to know what's going on... Many thanks, and let me know if more info is needed.

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• How should I structure the implementation of turn-based board game rules?

  - by Setzer22

  I'm trying to create a turn-based strategy game on a tilemap. I'm using design by component so far, but I can't find a nice way to fit components into the part I want to ask. I'm struggling with the "game rules" logic. That is, the code that displays the menu, allows the player to select units, and command them, then tells the unit game objects what to do given the player input. The best way I could thing of handling this was using a big state machine, so everything that could be done in a "turn" is handled by this state machine, and the update code of this state machine does different things depending on the state. However, this approach leads to a large amount of code (anything not model-related) going into a big class. Of course I can subdivide this big class into more classes, but it doesn't feel modular and upgradable enough. I'd like to know of better systems to handle this in order to be able to upgrade the game with new rules without having a monstruous if/else chain (or switch / case, for that matter). Any ideas? What specific design pattern other than MVC should I be using?

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• Free movement in a tile-based isometric game

  - by xtr486

  Is there a reasonable easy way to implement free movement in a tile-based isometric game? Meaning that the player wouldn't just instantly jump from one tile to another or not be "snapped" to the grid (for example, if the movement between tiles were animated but you'd be locked from doing anything before the animation finishes). I'm a really beginner with anything related to game programming, but with the help of this site and some other resources it was quite easy to do the basic stuff, but I haven't been able to find any useful resources for this particular problem. Currently I've improvised something close to this: http://jsfiddle.net/KwW5b/4/ (WASD movement). The idea for the movement was to use the mouse map to detect when the player has moved to a different tile and then flip the offsets, and for the most part it works correctly (each corner makes the player move to wrong location: see http://www.youtube.com/watch?v=0xr15IaOhrI, which is probably because I couldn't get the full mouse map work properly), but I have no illusions that it is even close to a good/sane solution. And anyway, it's mostly just to demonstrate what kind of a thing I'd like to implement.

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• Meet the Spec Leads & Active JSRs

  - by heathervc

  For your Monday reading pleasure, the JCP has published Spec Lead Profiles of In Progress/Active JSRs--there are 35 of these Spec Leads!  Find out more about these dedicated community leaders.  In preparing these profiles, the PMO also asked Specification Leads to tell about their experiences  as Spec Leads.  There were many themes that emerged around transparency, openness, agility and participation.  This led to a related article for those interested in learning about the experience of participating in the development of a Java Specification through the JCP program, see: "Active Specification Leads Offer Best Practices and Tips for Success". In Progress/Active JSRs were also reported on in the PMO Presentation during the last JCP EC Face-to-Face meeting in September 2012.   Now is a good time to start thinking about nominations for Star Spec Leads.  Nominations for 2012 are now open.  Anyone can submit a nomination for Star Spec Lead; however, we ask that you nominate an active JSR Spec Lead, operating a JSR under JCP program version 2.8 (introduced October 2011) or above.  Nominations close 31 December 2012.

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• How to persuade C fanatics to work on my C++ open source project?

  - by paperjam

  I am launching an open-source project into a space where a lot of the development is still done Linux-kernel-style, i.e. C-language with a low-level mindset. There are multiple benefits to C++ in our space but I fear those used to working in C will be scared off. How can I make the case for the benefits of C++? Specifically, the following C++ attributes are very valuable: concept of objects and reference-counting pointers - really don't want to have to malloc(sizeof(X)) or memcpy() structs templates for specialising whole bodies of code with specific performance optimizations and for avoiding duplication of code. template metaprogramming related to the above syntactic sweetness available (e.g. operator overloading, to be used in very small doses) STL Boost libraries Many of the knee-jerk negative reactions to C++ are illfounded. Performance does not suffer: modern compilers can flatten dozens of call stack levels and avoid bloat through wide use of template specializations. Granted, when using metaprogramming and building multiple specializations of a large call tree, compile time is slower but there are ways to mitigate this. How can I sell C++?

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• Android: Not able to experiment on own?

  - by user221287

  I have just started learning Android App Development a few days ago, with prior knowledge of C/C++, HTML and CSS. This is the situation I am facing Repeatedly: I am learning from a Video Tutorial Series, after each video, or each few videos, I say myself: Let's use what I have just learnt in the simple (and also "meaningless") app that I have made so far by watching the tutorials. I start implementing it, but then after a few minutes, I realize that I cannot do it because I do not know a few other syntax related to the particular thing, (or) I do not know whether these things can be combined with these other things by the use of . (dot). Whatever I try, I get either an error in eclipse or "Sorry...the app com.example.simple has stopped unexpectedly...." when the app runs. Then I search StackOverflow, Google and learn that what I want to implement requires learning about a few more classes, syntax and creating a few more java classes. I am not able to experiment on my own. Is it normal? Is it the HARD-WAY in which one is supposed to learn? Should I first learn Java and then come back to Android - would that be helpful?

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• Wireless (Broadcom) just stopped working after putting machine to sleep!

  - by tommed

  Had the wireless working on my Dell Studio 15 for months now (Ubuntu 10.04 64bit, now 10.10 64bit). But I shut the lid this morning, which put the machine to sleep; when I openend it again the wireless would no longer connect to anything :'( I rebooted the machine, but that didn't help. I then did ifconfig eth1 {down,up}, but that didn't help, then I did iwconfig eth1 power {down,on}, but that didn't work. So I uninstalled the wireless driver (Broadcom STA) from additional drivers (reboot in the middle), but it still won't work anymore!! This is the trace from daemon.log, looks like it is a driver issue? Nov 28 12:26:39 ulap NetworkManager[1218]: (eth1): supplicant connection state: disconnected - scanning Nov 28 12:26:39 ulap NetworkManager[1218]: (eth1): supplicant connection state: scanning - disconnected Nov 28 12:26:45 ulap NetworkManager[1218]: (eth1): supplicant connection state: disconnected - scanning Nov 28 12:26:50 ulap wpa_supplicant[1295]: Trying to associate with MY_MAC_CODE (SSID='MY_WIRESS_SSID' freq=2417 MHz) Nov 28 12:26:50 ulap wpa_supplicant[1295]: Association request to the driver failed Nov 28 12:26:50 ulap NetworkManager[1218]: (eth1): supplicant connection state: scanning - associating Nov 28 12:26:51 ulap wpa_supplicant[1295]: Associated with MY_MAC_CODE Nov 28 12:26:51 ulap NetworkManager[1218]: (eth1): supplicant connection state: associating - associated Nov 28 12:27:01 ulap wpa_supplicant[1295]: Authentication with MY_MAC_CODE timed out. Nov 28 12:27:01 ulap NetworkManager[1218]: (eth1): supplicant connection state: associated - disconnected Anyone seen this, or know how I can get around this issue? It had been working fine up until now?! Even ran update-manager, but there wasn't any changes to the wireless drivers (or any related networking areas). Running the most up-to-date version of 10.10 x64. My android phone and other devices are still working on the wireless.

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• License compatibility question

  - by Ivaylo Slavov

  I have a question regarding software licenses. I plan to put a license to a framework that I have written. My intention is that the license should be open, in order to maintain a community. Also I want to control when a new version is released and which changes will be included. The license should allow the framework to be used with commercial products, therefore respecting their own license. I have done some quick research and I decided to double license my work under the Apache License 2.0 (ASL) and Eclipse Public License (EPL). My point is that the EPL will provide me the ability to control the release cycle as well as the contributions to the project and the Apache license will take care for any patents a 3rd party might want to use in a derived work. Also both are open licenses. My question is related to the GLP and LGPL licenses. If I have the above licenses to my framework, will it be possible and legal, for someone to create a derived work of my framework, that is also a derived work of, or links a library that is under the LGPL license? Thanks in advance. EDIT: To be clear I will explain how I expect things to work. The framework will define some common API for certain functionalities as well as a Wrapper class that will invoke an implementation of that API. The Wrapper will be part of the framework, but it will internally call the actual implementation. This implementation should be in a separate library, and such libraries I would like to be developed and maintained by community. Surely the community will have to access the framework but I want to limit changes to the framework by the community but I want to provide freedom for any API implementation (a derived work of the framework). The framework will enable flexible configuration mechanisms that will tell which implementation of an API will be used.

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• What are the design principles that promote testable code? (designing testable code vs driving design through tests)

  - by bot

  Most of the projects that I work on consider development and unit testing in isolation which makes writing unit tests at a later instance a nightmare. My objective is to keep testing in mind during the high level and low level design phases itself. I want to know if there are any well defined design principles that promote testable code. One such principle that I have come to understand recently is Dependency Inversion through Dependency injection and Inversion of Control. I have read that there is something known as SOLID. I want to understand if following the SOLID principles indirectly results in code that is easily testable? If not, are there any well-defined design principles that promote testable code? I am aware that there is something known as Test Driven Development. Although, I am more interested in designing code with testing in mind during the design phase itself rather than driving design through tests. I hope this makes sense. One more question related to this topic is whether it's alright to re-factor an existing product/project and make changes to code and design for the purpose of being able to write a unit test case for each module?

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• .net developers and web designers: how to interact?

  - by just_name

  I'm an asp.net developer, and I face some problems when I deal with designers. The designer always complains about the asp.net server controls. They rather just have an html file and create css files along with the required images to go with those. Sometimes if the design phase is done in advance I get html files with related css files, but then we face many problems integrating the design with the aspx files (sever controls an telerik controls ... etc). What I want to ask about is: How to overcome these problems? The designers prefer php- and mvc developers because of the problems with .net server controls. I need to know how to interact with the designers in a correct way. Are there any tools or applications to provide the designers with the rendered (html page) of the .aspx pages? By that I mean the page in runtime rather than the aspx in visual studio. They do use Web Expression but they want the rendered page in html as well.

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• Oneric Aspire One. After latest 11.10 update to Linux 3.0.0-9 boot hangs at staement "Starting Bluetooth"

  - by hevh

  I have today updated the version of Linux on Ubuntu on my Acer Aspire One. The boot hangs on the statement "Starting Bluetooth". Help please!! EDIT1: I get the grub menu when I start the netbook and it doesn´t matter which version of linux I choose the resulkt is the same. It gets as far as the Ubuntu spash screen then drops into command line mode then hangs on the line "Starting Bluetooth". I can log in and have tried various forms of the apt-get command to fix the system but with no result. I do not need bluetooth at the moment and so could remove the application if I knew how. (have tried apt-get remove bluez). When I use the command sudo apt-get -f install I get an error message saying "There's not enough space in /var/lib/mysql/" folowed by several other error messages. I have spent some time looking for similar problems and solutions using google but so far got to nothing to help. Thanks EDIT2: I have since discovered when running Knoppix or slitaz from a usb stick that the file managers report the hard disc as having no space. However GPARTED reports it as having 3.69gb. I do recall making space on the hard drive by deleting some old files and emptying trash whilst the update was running; perhaps its related. Any suggestions for how I can recover the apparently lost space from hard disc without losing the data. I have backups of the actual data but do not wnat to lose the applcations configuration. Thanks Kev

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• Screen refresh/display problem in Xubuntu 14.04

  - by user286328

  I have just installed Xubuntu 14.04 as a dual boot on a desk top (Pentium R 4 CPU, 2.66 GHZ, 2G RAM) running XP home edition. In some situations when in Xubuntu I am having what seem to be screen refresh problems. When I open File Manager or Settings Manager the text names of various apps display but most of the icons do not. Moving the mouse over an app name generally causes the icon to appear, but it often vanishes once the mouse pointer is moved. This issue occurs irrespective of the view setting. Icons appear fine in the menu that comes up when I right click in the desktop, and in the menu that comes up when I click the mouse icon at top left. What I suspect is a related issue. In Abiword text sometimes fades, disappears or does not display immediately when I type, or text of the whole document fades. It then comes back or darkens if I left click a few times on the text. If I scroll through a document the text often fades and may remain faded until I left click a few times.

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• No Need to Disable Java, Update Instead

  - by Tori Wieldt

  Oracle has just released Security Alert CVE-2012-4681 to address 3 distinct but related vulnerabilities and one security-in-depth issue affecting Java running in desktop browsers.  These vulnerabilities are: CVE-2012-4681, CVE-2012-1682, CVE-2012-3136, and CVE-2012-0547.  These vulnerabilities are not applicable to standalone Java desktop applications or Java running on servers, i.e. these vulnerabilities do not affect any Oracle server based software. Due to the severity of these vulnerabilities, the public disclosure of technical details and the reported exploitation of CVE-2012-4681 "in the wild," Oracle strongly recommends that customers apply the updates provided by this Security Alert as soon as possible.  Developers should download the latest release at http://www.oracle.com/technetwork/java/javase/downloads/index.html   Java users should download the latest release of JRE at http://java.com Windows users can take advantage of the Java Automatic Update to get the latest release JUG leader John Yeary tweeted "I want to take a moment to THANK #Oracle for doing the right thing. Too often people don't say thanks enough when they get it right." Thanks for your thanks.  For More Information Oracle Security Alert for CVE-2012-4681 Change to Java SE 7 and Java SE 6 Update Release Numbers

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• How do you coordinate with co-workers to give a balanced interview?

  - by goldierox

  My company has been conducting a lot of interviews lately for candidates with various experience levels, ranging from interns to senior candidates. We put our candidates through five 45 minute interview sessions where we try to ask a range of questions. One person always asks the same questions that test logic and communication. The rest typically split time between a whiteboard coding question and a discussion of previous projects, technologies the interviewee has worked with, and what he/she is looking for a job. Generally, we know the range of questions that other people on the loop will ask. Sometimes we switch things up and end up having redundancies. Today, 3 interviewers asked tree-related questions. Other times, we've all honed in on the same project on a resume and have had the interviewee talk about it with everyone. I think a smooth interview process would help us learn more about the candidate while giving the impression to the candidate that we have our act together as a team. How do you coordinate with others in the interview loop to give a balanced interview?

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• How can I convince my boss that ANSI C is inadequate for our new project?

  - by justifiably cowardly

  A few months ago, we started developing an app to control an in-house developed test equipment and record a set of measurements. It should have a simple UI, and would likely require threads due to the continuous recording that must take place. This application will be used for a few years, and shall be maintained by a number of computer science students during this period. Our boss graduated some 30 years ago (not to be taken as an offense; I have more than half that time on my back too) and has mandated that we develop this application in ANSI C. The rationale is that he is the only one that will be around the entire time, and therefore he must be able to understand what we are doing. He also ruled that we should use no abstract data types; he even gave us a list with the name of the global variables (sigh) he wants us to use. I actually tried that approach for a while, but it was really slowing me down to make sure that all pointer operations were safe and all strings had the correct size. Additionally, the number of lines of code that actually related to the problem in hand was a only small fraction of our code base. After a few days, I scrapped the entire thing and started anew using C#. Our boss has already seen the program running and he likes the way it works, but he doesn't know that it's written in another language. Next week the two of us will meet to go over the source code, so that he "will know how to maintain it". I am sort of scared, and I would like to hear from you guys what arguments I could use to support my decision. Cowardly yours,

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• How to prevent computer from automatically sleeping and/or hibernating?

  - by mehaase

  I'm running Ubuntu 12.04, and my laptop* won't wake from sleep/suspend/hibernate. (Is sleep the same thing as suspend?) I'm not even sure which of these things it's doing. When I am done working for the day, I lock my screen (Control-Alt-L). When I come back the next day, the screen is in power saving mode, and no amount of typing or clicking (on the usb keyboard/mouse or the builtin keyboard/trackpad) nor tapping the power button will bring it back to life. The only way I can get my machine to work is to hold down the power button until it shuts off, then press the power button again to turn it back on. Obviously, anything I had open from the previous day is pretty much gone -- in particular, my VMs all get rudely shut down without any warning. This is driving me INSANE. I spend the first hour of every work day trying to figure out how to get my computer to stop locking up over night. What I've tried: Editing the org.freedesktop.upower.policy to disable suspend and hibernate. Setting power management options in "Power" section of "System Settings". Looking at all power management options in the BIOS (none appear to be relevant to sleep/suspend/hibernate). Reading every forum post/askubuntu post that I can find that's even tangentially related to the subject. My question: how to disable the automatic sleep and/or hibernate (and/or anything similar) in Ubuntu 12.04. I don't care if it's still possible to sleep/suspend/hibernate/whatever by pushing buttons or running some command or reciting led zeppelin lyrics backwards. I just want my laptop to be ready for work in the morning. *The laptop is a Dell Latitude something or other. I don't want to get too specific because I've seen a lot of similar questions get closed for being too specific. I think my question is generic enough to stand -- it's a question about the latest, stable version of Ubuntu.

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• How to handle notifications to several partial views of the same model?

  - by Seki

  I am working on refactoring an old simulation of a Turing machine. The application uses a class that contains the state and the logic of program execution, and several panels to display the tape representation and show the state, messages, and the GUI controls (start, stop, program listing, ...). I would like to refactor it using the MVC architecture that was not used originaly: the Frame is the only way to get access to the different panels and there is also a strong coupling between the "engine" class and the GUI updates in the way of frame.displayPanel.state.setText("halted"); or frame.outputPanel.messages.append("some thing"); It looks to me that I should put the state related code into an observable model class and make the different panels observers. My problem is that the java Observable class only provides a global notification to the Observers, while I would prefer not to refresh every Observers everytime, but only when the part that specificaly observe has changed. I am thinking of implementing myself several vectors of listeners (for the state / position, for the output messages, ...) but I feel like reinventing the wheel. I though also about adding some flags that the observers could check like isNewMessageAvailable(), hasTapeMoved(), etc but it sounds also approximative design. BTW, is it ok to keep the fetch / execute loop into the model or should I move it in another place? We can think in a theorical ideal way as I am completely revamping this small application.

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• Interfaces: profit of using

  - by Zapadlo

  First of all, my ubiquitous language is PHP, and I'm thinking about learning Java. So let me split my question on two closely related parts. Here goes the first part. Say I have a domain-model class. It has some getters, setters, some query methods etc. And one day I want to have a possibility to compare them. So it looks like: class MyEntity extends AbstractEntity { public function getId() { // get id property } public function setId($id) { // set id property } // plenty of other methods that set or retrieve data public function compareTo(MyEntity $anotherEntity) { // some compare logic } } If it would have been Java, I should have implemented a Comparable interface. But why? Polymorphism? Readbility? Or something else? And if it was PHP -- should I create Comparable interface for myself? So here goes the second part. My colleague told me that it is a rule of thumb in Java to create an interface for every behavioral aspect of the class. For example, if I wanted to present this object as a string, I should state this behaviour by something like implements Stringable, where in case of PHP Stringable would look like: interface Stringable { public function __toString(); } Is that really a rule of thumb? What benefits are gained with this approach? And does it worth it in PHP? And in Java?

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• Very slow wireless connection (unrelated to power management) using Netgear N150 WNA1100 in 12.04

  - by vgaldikas

  I am using a Netgear N150 WNA1100 USB Adapter. The network driver is: ath9k_htc. When I use Ubuntu 12.04 my wireless connection is much slower than when I use the WNA1100 with my Windows 7 installation on the same machine. I have been researching this and the most common reason for this seems to be related to power management. However for me this is off by default. I had entered a bunch of different commands and, at one stage, I got it to work at full power. But then I rebooted the machine and it went back to slow again. After entering the different commands I was afraid that I may have messed something up, so I performed a fresh install of Ubuntu. I still have the same problem. My wireless connection is still much slower when using Ubuntu than when using Windows 7. I am not sure what other info could help... EDIT: Ok, I have made live usb from the iso file I used to install Ubuntu on this pc, and ran it on my laptop. Still the same problem. However la[top works grand on cable. I suppose this means that my wireless adapter or network driver can be eliminated as root of the problem.. So maybe to do with router itself? I use ZyXEL P-660HW-D1

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