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  • Ubuntu 12.04 shut down freezes

    - by sam
    I am using Ubuntu 12.04 for last one month without any problem. It was upgraded from Ubuntu 10.10. Recently I needed to replace my hard disk. After replacement I installed Windows 7 and Ubuntu 12.04 on the system. For some days it went ok, but now shutting down from Ubuntu is causing problems. It freezes on the text screen saying acpid=exiting checking for running unattended upgrades. After that I waited for a long time, but it didn't go off and I had to hit ctrl+alt+del to restart the system and booting from Windows and then shutting down from there. This happens every time I shut down my system from Ubuntu. I have seen many posts regarding the same kind of issues but none of the solutions reported there helped me out.

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  • Documenting user interfaces in a mouse-less touch UI

    - by Daniel Cazzulino
    “Old” apps rely on mouse pointing and tooltips to explain what a given button is for. Maybe there is text associated with the button, but you can only put so much text without wasting useful screen state. More so in a phone or tablet app. I’ve seen a trend in Google apps where they put an overlay on top of the app the first time it runs, to explain how the various pieces of UI work. I have seen this also on my Nexus phone, but don’t have a screenshot. I don’t recall a way to actually bring that help overlay back again, so that’s maybe some built-in gesture that’s missing. Here’s what it looks like in Gmail, the first time you use the new compose layout:   I like the approach very much, and I think it’s something that should become standard part of mobile OS, and Windows, including a standard way to bring that help up from within any app....Read full article

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  • New ZFS Encryption features in Solaris 11.1

    - by darrenm
    Solaris 11.1 brings a few small but significant improvements to ZFS dataset encryption.  There is a new readonly property 'keychangedate' that shows that date and time of the last wrapping key change (basically the last time 'zfs key -c' was run on the dataset), this is similar to the 'rekeydate' property that shows the last time we added a new data encryption key. $ zfs get creation,keychangedate,rekeydate rpool/export/home/bob NAME PROPERTY VALUE SOURCE rpool/export/home/bob creation Mon Mar 21 11:05 2011 - rpool/export/home/bob keychangedate Fri Oct 26 11:50 2012 local rpool/export/home/bob rekeydate Tue Oct 30 9:53 2012 local The above example shows that we have changed both the wrapping key and added new data encryption keys since the filesystem was initially created.  If we haven't changed a wrapping key then it will be the same as the creation date.  It should be obvious but for filesystems that were created prior to Solaris 11.1 we don't have this data so it will be displayed as '-' instead. Another change that I made was to relax the restriction that the size of the wrapping key needed to match the size of the data encryption key (ie the size given in the encryption property).  In Solaris 11 Express and Solaris 11 if you set encryption=aes-256-ccm we required that the wrapping key be 256 bits in length.  This restriction was unnecessary and made it impossible to select encryption property values with key lengths 128 and 192 when the wrapping key was stored in the Oracle Key Manager.  This is because currently the Oracle Key Manager stores AES 256 bit keys only.  Now with Solaris 11.1 this restriciton has been removed. There is still one case were the wrapping key size and data encryption key size will always match and that is where they keysource property sets the format to be 'passphrase', since this is a key generated internally to libzfs and to preseve compatibility on upgrade from older releases the code will always generate a wrapping key (using PKCS#5 PBKDF2 as before) that matches the key length size of the encryption property. The pam_zfs_key module has been updated so that it allows you to specify encryption=off. There were also some bugs fixed including not attempting to load keys for datasets that are delegated to zones and some other fixes to error paths to ensure that we could support Zones On Shared Storage where all the datasets in the ZFS pool were encrypted that I discussed in my previous blog entry. If there are features you would like to see for ZFS encryption please let me know (direct email or comments on this blog are fine, or if you have a support contract having your support rep log an enhancement request).

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  • Wireless network unstable and often WPA2 protected networks just don't work

    - by Pedro
    I have an issue with my wireless network,so that the connection is working for only a few minutes, after which my browser no longer is able to load pages, even if the wireless is still active/connected. Furthermore, most of the time WPA2-personal protected networks don't work, (yesterday was the first time it worked - for a few minutes). By "don't work" I mean that it seems to successfully connect, but the browser can't load pages. I am running Ubuntu 10.10 32bit, and my wireless card is a RaLink rt3090. No changes have been done to any settings since Ubuntu was installed - networking began working on its own after the installation - but as described in first paragraph not very well.

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  • Achieving decoupling in Model classes

    - by Guven
    I am trying to test-drive (or at least write unit tests) my Model classes but I noticed that my classes end up being too coupled. Since I can't break this coupling, writing unit tests is becoming harder and harder. To be more specific: Model Classes: These are the classes that hold the data in my application. They resemble pretty much the POJO (plain old Java objects), but they also have some methods. The application is not too big so I have around 15 model classes. Coupling: Just to give an example, think of a simple case of Order Header - Order Item. The header knows the item and the item knows the header (needs some information from the header for performing certain operations). Then, let's say there is the relationship between Order Item - Item Report. The item report needs the item as well. At this point, imagine writing tests for Item Report; you need have a Order Header to carry out the tests. This is a simple case with 3 classes; things get more complicated with more classes. I can come up with decoupled classes when I design algorithms, persistence layers, UI interactions, etc... but with model classes, I can't think of a way to separate them. They currently sit as one big chunk of classes that depend on each other. Here are some workarounds that I can think of: Data Generators: I have a package that generates sample data for my model classes. For example, the OrderHeaderGenerator class creates OrderHeaders with some basic data in it. I use the OrderHeaderGenerator from my ItemReport unit-tests so that I get an instance to OrderHeader class. The problem is these generators get complicated pretty fast and then I also need to test these generators; defeating the purpose a little bit. Interfaces instead of dependencies: I can come up with interfaces to get rid of the hard dependencies. For example, the OrderItem class would depend on the IOrderHeader interface. So, in my unit tests, I can easily mock the behaviour of an OrderHeader with a FakeOrderHeader class that implements the IOrderHeader interface. The problem with this approach is the complexity that the Model classes would end up having. Would you have other ideas on how to break this coupling in the model classes? Or, how to make it easier to unit-test the model classes?

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  • MySQL in ASP.NET: Mono using VB.NET

    In a previous tutorial titled ASP.NET Web Development and Hosting published October 25th you learned how to develop ASP.NET websites using Mono Project and deploy them in your existing Linux-Apache hosting account. The example ASP.NET mono website http www.dotnetdevelopment.net did not use a database at the time the tutorial was written. In this part you will learn how to connect and use a MySQL database with your ASP.NET mono project website.... Microsoft Exchange - IT peace of mind Big time solution. Small-stakes price. Get the White Paper now.

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  • How to examine the speed of your code results?

    - by Goma
    Hi. Whatever was your choice PHP, ASP.NET, Ruby On Rails or even JSP. You know that you can develop a website to give a specific result or to do some tasks in many ways. I mean you can change your code to make it shorter (or for any other reason) but to give the same result. In this case how do you test which code was faster to excute so you choose it to make your website faster? I mean do you have any tools or ideas in how to test the time of execution for your code and compare it with time of execution after you do some edit?

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  • How do I set my environment up for TopCoder?

    - by Nils
    I tried out TopCoder today. While I liked the problem, the Java editor didn't work for me. The remote compiling time and the lack of unit tests also made it difficult to complete the task. I ended up coding the solution in Eclipse and the pasting it into the TopCoder window. I tried out EclipseCoder, but it didn't suit my needs either. What tools do you use and how do you hook up your development environment with TopCoder? How does TopCoder handle submissions, and is there any way to speed up the time it takes to process them?

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  • Do you count a Masters in CS as a negative? [closed]

    - by Pete Hodgson
    In my experience interviewing developers I feel like candidates who've achieved a Masters in Comp Sci tend to be worse programmers on average that those who don't have a Masters. Is that just me, or have others noticed this phenomenon? If so, why would that be the case? UPDATE I appreciate the thoughtful comments. I think I should have been clearer in the comparison I'm making. Given two candidates who graduated from college around the same time, someone who went on to gain a Masters seems on average to be a worse programmer than someone who spent all their time in industry.

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  • Speaking at SW FL Code Camp Sept 8th 2012

    - by Nikita Polyakov
    It’s always a great time when it’s a Code Camp! I will be presenting “Windows [Phone] Live Tiles & Push Notifications“ at this year’s South West Florida Code Camp 2012 on September 8th.  As with many Code Camps – it’s going to be a trick to pick which session to go to at each time slot, and that’s how you know it’s a good one – so much content – so many great speakers! Hope to see you there! Details & Registration: http://codecamp.swfldev.net Code Camp 2012 will take place at: Hodges University 2649 Professional Circle Naples, Florida 34119 Don’t forget about these two great events coming up as well: http://www.TampaCodeCamp.com and http://itprocamp.com/tampa/

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  • Structure vs. programming

    - by ChristopherW
    Is it bad that I often find myself spending more time on program structure than actually writing code inside methods? Is this common? I feel I spend more time laying the foundation than actually building the house (metaphorically). While I understand that without a good foundation the house will cave in, but does it legitimately need to take half of the project to finalize code structure? I understand design patterns, and I know where to go if I need help on choosing one, but often I find myself doubting my own choices.

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  • Should SpecFlow be used with BDD as a solo developer?

    - by baens
    I am a long time fan of TDD and after reading the RSpec book, would like to transistion to a BDD process. I like the idea of driving from the outside in, as it is presented in the book. What I am having a hard time getting a handle on is how to structure the tests. I have tried SpecFlow, but it seems cumbersome to use when I am the only one really ever going to be looking at the tests. I like the idea of just using straight NUnit, rather then adding another framework, like it is presented here. Is this a good way to try and structure BDD tests? Is there more information out there on comparing the two ways (that may even be more recent)?

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  • Play the Microsoft Game “Are You Certifiable?”

    - by Mysticgeek
    Want to know if you have what it takes to be certified by Microsoft? Today we check out an enjoyable way to practice and test your IT knowledge of Microsoft products.  There are two modes, one where you log in with your Live account so you can save your progress, and play additional levels.   If you log in with your Live account, it’s obvious that Microsoft wants to sell you some certification courses, so just be aware of that. Or Guest Play where you can only play one episode and scores are not saved.   Playing the Game We’ll take a look at the Guest Play just so you get a sense of what the game is about. Enter in a username and pick an avatar… Then read the instructions…we won’t go over them all here, there are a lot of options and points are scored by correct answers, amount of time it takes to answer them, you get vouchers to play a question before answers are shown…etc. Once you start playing, you get certification questions, you can take as much time to read the question as you want, then hit the Answer button when you’re ready. Now you have four answers to choose from…notice the time clicking down, so you want to try to answer as quickly as possible. After selecting the answer, you’re told if it is correct or not, then given an answer explaination, along with your score. You can flag the topic so it comes up again, which is a good way to get repetition of various topics, which really helps when taking the cert tests. If you get an answer wrong, you still get an answer explanation which is cool, so you can learn and better understand the topic. Conclusion This game is definitely not for everyone, only those who are curious or want a fun way to practice for Microsoft certifications. If you are interested in a cert from Microsoft, it’s a fun way to practice up. Play Are You Certifiable? Similar Articles Productive Geek Tips Geek Fun: Play Alien Arena the Free FPS GameFriday Fun: Get Your Mario OnFriday Fun: Play Bubble QuodFriday Fun: 13 Days in HellFriday Fun: Open Doors TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 Download Free iPad Wallpapers at iPad Decor Get Your Delicious Bookmarks In Firefox’s Awesome Bar Manage Photos Across Different Social Sites With Dropico Test Drive Windows 7 Online Download Wallpapers From National Geographic Site Spyware Blaster v4.3

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  • How You Helped Shape Java EE 7...

    - by reza_rahman
    For many of us working with the JCP for years, the commitment to transparency and openness is very clear. For others, perhaps the most visible sign to date of this high regard for grassroots level input is a survey on Java EE 7 gathered a few months ago. The survey was designed to get open feedback on a number of critical issues central to the Java EE 7 umbrella specification including what APIs to include in the standard. The survey was highly successful with a large number of high quality responses. With Java EE 7 under our belt and the horizons for Java EE 8 emerging, this is a good time to thank everyone that took the survey once again for their thoughts and let you know what the impact of your voice actually was. I've posted the details on my personal blog. I hope you are encouraged by how your input to the survey helped shape Java EE 7 and continues to shape Java EE 8. Maybe now is the time for you to get more involved :-)?

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  • Lenovo z470 getting hot, after 12.04 install

    - by Rodrigo
    When I was using Windows 7 my notebook temperature was very good, it stayed very cool. After I installed 12.04, my notebook base is hot all the time, I cannot even put my hands on it for a long time. My notebook has a 2nd generation Intel i5 processor. I installed Jupiter and it shows 72 Degrees Celsius constantly. Anyone got a fix for this? I don't want to go back to windows but if I do not find any solution I will have to do it. I'd be very grateful for any help.

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  • Use Expressions with LINQ to Entities

    - by EltonStoneman
    [Source: http://geekswithblogs.net/EltonStoneman] Recently I've been putting together a generic approach for paging the response from a WCF service. Paging changes the service signature, so it's not as simple as adding a behavior to an existing service in config, but the complexity of the paging is isolated in a generic base class. We're using the Entity Framework talking to SQL Server, so when we ask for a page using LINQ's .Take() method we get a nice efficient SQL query for just the rows we want, with minimal impact on SQL Server and network traffic. We use the maximum ID of the record returned as a high-water mark (rather than using .Skip() to go to the next record), so the approach caters for records being deleted between page requests. In the paged response we include a HasMorePages indicator, computed by comparing the max ID in the page of results to the max ID for the whole resultset - if the latter is bigger, then there are more pages. In some quick performance testing, the paged version of the service performed much more slowly than the unpaged version, which was unexpected. We narrowed it down to the code which gets the max ID for the full resultset - instead of building an efficient MAX() SQL query, EF was returning the whole resultset and then computing the max ID in the service layer. It's easy to reproduce - take this AdventureWorks query:             var context = new AdventureWorksEntities();             var query = from od in context.SalesOrderDetail                         where od.ModifiedDate >= modified                          && od.SalesOrderDetailID.CompareTo(id) > 0                         orderby od.SalesOrderDetailID                         select od;   We can find the maximum SalesOrderDetailID like this:             var maxIdEfficiently = query.Max(od => od.SalesOrderDetailID);   which produces our efficient MAX() SQL query. If we're doing this generically and we already have the ID function in a Func:             Func<SalesOrderDetail, int> idFunc = od => od.SalesOrderDetailID;             var maxIdInefficiently = query.Max(idFunc);   This fetches all the results from the query and then runs the Max() function in code. If you look at the difference in Reflector, the first call passes an Expression to the Max(), while the second call passes a Func. So it's an easy fix - wrap the Func in an Expression:             Expression<Func<SalesOrderDetail, int>> idExpression = od => od.SalesOrderDetailID;             var maxIdEfficientlyAgain = query.Max(idExpression);   - and we're back to running an efficient MAX() statement. Evidently the EF provider can dissect an Expression and build its equivalent in SQL, but it can't do that with Funcs.

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  • Catching typos or other errors in web-based scripting languages

    - by foreyez
    Hi, My background is mainly strongly typed languages (java, c++, c#). Having recently gotten back to a bit of javascript, I found it a bit annoying that if I misspell something by accident (for example I'll type 'myvar' instead of 'myVar') my entire script crashes. The browser itself most of the time doesn't even tell me I have an error, my program will just be blank, etc. Then I have to hunt down my code line by line and find the error which is very time consuming. In the languages I am used to the compiler lets me know if I made a typo. My question to you is, how do you overcome this issue in scripting (javascript)? Can you give me some tips? (this question is mainly aimed at people that have also come from a strongly typed language). Note: I mainly use the terminal/VIM ... this is mainly b/c I like terminal and I SSH alot too

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  • Creating widgets using GtkBuilder

    - by user72943
    I am using Glade to design a Box with widgets and then load these widgets into my UI at run-time. To create each Box with widgets at run-time, I create a new GtkBuilder, call add_from_string passing in the text from the .ui file Glade creates, and then use the object returned from get_object("box1") in the UI. I know I could create the widgets with code, but for now, I'd like to use the .ui files Glade creates. It seems inefficient though to instantiate a new GtkBuilder object and the wasted Window object for every Box I want to create. Is there a more efficient method to load .ui files without creating a new GtkWidget object and wasted Window object? Thanks, Vance

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  • Not getting auto login page on my Hathway internet connection

    - by Vasu
    I am using firefox browser and my laptop is DELL Inspiron 1545. I am using Hathway internet connection. When i switch on my internet modem and try to use(browse any website), for the first time in a day it will redirect me to Hathway's login(something like "login.hatyway.com/.....") page automatically. It is working fine in windows but not in Ubuntu 11.10. So I go back to windows every time and then login and then i come back to ubuntu to use. Could you please let me know if there is a solution to this problem.

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  • Background & Research Methods section (Writing an Article)

    - by sterz
    It is my first time writing an article on a software project. I am supposed to use ACM UbiComp paper format. I already have a structure that I should follow and there is a Background & Research Methods section after Abstract, Introduction, Related Work sections. I have browser through several articles, but some of them either dont have it, have only background section or have only research methods section. I am having hard time to find an article that has this section and moreover what I must write on here. My project is about Bluetooth location tracking and I do have the implementation and evaluation, so it is not something theoretical.

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  • Are we Borg?

    - by TiborKaraszi
    Is it time to stop remeber things? For real, this time? Today I needed to find two pieces of SQL Server related information. One was straight foward, I posted it on #sqlhelp on twitter and a minute or so later I had the answer. The other was a bit more involved and I asked around in our MVP mail list - a couple of hours later I had bunch of suggestions and tips. These are only examples, it could just as well have been some web-forum, newsgroup, or some other forum. We've all had cases like this,...(read more)

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