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• Multi-screen and Nvidia GT220

  - by Bohors

  Excuse me first for my broken English I have 3 monitors on two Nvidia GT220. Unity 2D works fine after using the proprietary drivers. But no way to use compiz effects. I'm on Ubuntu 11.10 (I also tested for curiosity 12.04 for the same result) I noticed in the "System Settings" / "details" that my graphics card is not recognized (graphics card "unknown") and "View" only returns me my first screen (with the correct resolution) also in unknown. $ lspci | grep VGA 01:00.0 VGA compatible controller: NVIDIA Corporation GT216 [GeForce GT 220] (rev a2) 05:00.0 VGA compatible controller: NVIDIA Corporation GT216 [GeForce GT 220] (rev a2) xorg.conf : Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 Screen 1 "Screen1" Below "Screen0" Screen 2 "Screen2" RightOf "Screen0" InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "1" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "Acer V243HL" HorizSync 30.0 - 80.0 VertRefresh 55.0 - 75.0 Option "DPMS" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor1" VendorName "Unknown" ModelName "LG Electronics L1920P" HorizSync 30.0 - 83.0 VertRefresh 56.0 - 75.0 Option "DPMS" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor2" VendorName "Unknown" ModelName "Acer V243HL" HorizSync 30.0 - 80.0 VertRefresh 55.0 - 75.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GT 220" BusID "PCI:1:0:0" EndSection Section "Device" Identifier "Device1" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GT 220" BusID "PCI:5:0:0" Screen 0 EndSection Section "Device" Identifier "Device2" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GT 220" BusID "PCI:5:0:0" Screen 1 EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "TwinView" "0" Option "TwinViewXineramaInfoOrder" "DFP-0" Option "metamodes" "1920x1080_60_0 +0+0; nvidia-auto-select +0+0" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen1" Device "Device1" Monitor "Monitor1" DefaultDepth 24 Option "TwinView" "0" Option "metamodes" "CRT: nvidia-auto-select +0+0" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" Identifier "Screen2" Device "Device2" Monitor "Monitor2" DefaultDepth 24 Option "TwinView" "0" Option "metamodes" "DFP: nvidia-auto-select +0+0" SubSection "Display" Depth 24 EndSubSection EndSection Section "Extensions" Option "Composite" "Disable" EndSection Have you any idea? thanks

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• windows 8 + Ubuntu dual boot

  - by Jack Yuan

  I installed Ubuntu 13.04 on Windows 8. Yes I can access both of them, but the process is kind of long. In BIOS, EFI is for Windows 8, legacy support is for Ubuntu. If I choose EFI first, the startup just go straight to Win8 without offering me a choice. If I choose legacy first, the starup will offer me a choice between win8 and ubuntu. But I can only choose Ubuntu. If i choose win8, there will be a mistake(file missing under configuration). That is to say, every time i wanna switch to another OS, I have to go into BIOS and change the priority settings. I heard something about secure boot might be the cause of this situation. But the thing is that there is not even an option called "secure boot" in my BIOS, which means i cannot disable it. All I want is that an option menu appears everytime i turn on my computer so i can easily choose what OS I want for today. Can anyone help me plz? Thank you very much!!

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• Career-Defining Moments

  - by Robz / Fervent Coder

  Originally posted on: http://geekswithblogs.net/robz/archive/2013/06/25/career-defining-moments.aspx Fear holds us back from many things. A little fear is healthy, but don’t let it overwhelm you into missing opportunities. In every career there is a moment when you can either step forward and define yourself, or sit down and regret it later. Why do we hold back: is it fear, constraints, family concerns, or that we simply can't do it? I think in many cases it comes to the unknown, and we are good at fearing the unknown. Some people hold back because they are fearful of what they don’t know. Some hold back because they are fearful of learning new things. Some hold back simply because to take on a new challenge it means they have to give something else up. The phrase sometimes used is “It’s the devil you know versus the one you don’t.” That fear sometimes allows us to miss great opportunities. In many people’s case it is the opportunity to go into business for yourself, to start something that never existed. Most hold back hear for a fear of failing. We’ve all heard the phrase “What would you do if you knew you couldn’t fail?”, which is intended to get people to think about the opportunities they might create. A better term I heard recently on the Ruby Rogues podcast was “What would be worth doing even if you knew you were going to fail?” I think that wording suits the intent better. If you knew (or thought) going in that you were going to fail and you didn’t care, it would open you up to the possibility of paying more attention to the journey and not the outcome. In my case it is a fear of acceptance. I am fearful that I may not learn what I need to learn or may not do a good enough job to be accepted. At the same time that fear drives me and makes me want to leap forward. Some folks would define this as “The Flinch”. I’m learning Ruby and Puppet right now. I have limited experience with both, limited to the degree it scares me some that I don’t know much about either. Okay, it scares me quite a bit! Some people’s defining moment might be going to work for Microsoft. All of you who know me know that I am in love with automation, from low-tech to high-tech automation. So for me, my “mecca” is a little different in that regard. Awhile back I sat down and defined where I wanted my career to go and it had to do more with DevOps, defined as applying developer practices to system administration operations (I could not find this definition when I searched). It’s an area that interests me and why I really want to expand chocolatey into something more awesome. I want to see Windows be as automatable and awesome as other operating systems that are out there. Back to the career-defining moment. Sometimes these moments only come once in a lifetime. The key is to recognize when you are in one of these moments and step back to evaluate it before choosing to dive in head first. So I am about to embark on what I define as one of these “moments.”  On July 1st I will be joining Puppet Labs and working to help make the Windows automation experience rock solid! I’m both scared and excited about the opportunity!

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• Late feedback

  - by Sveta Smirnova

  MySQL Community team asked me to write about Devconf 2013 few months ago. Conference was in June, 2013, but I remembered about this my promise only now: month later after my participating in MySQL Connect and Expert Troubleshooting seminar (change country to United Kingdom if you see blank page). I think it is too late for the feedback, but I still have few thoughts which I want to record.DevConf (former PHPConf) always was a place where I tried new topics. At first, because I know audience there very well and they will be bored if I repeat a story which I was telling last year, but also because it is much easier to get feedback in your own native language. But last years my habit seems started to change and I presented improved version of my 2012 MySQL Connect talk about MySQL backups. Of course, I also had a seminar with unique topic, made for this conference first time: Troubleshooting MySQL Performance with EXPLAIN and Using Performance Schema to Troubleshoot MySQL. And these topics, improved, were presented at the expert seminar. It is interesting how my habit changes and one public speaking activity interferes next one.What is good about DevConf is it forces you to create new ideas and do it really well, because audience is not forgiving at all, so they catch everything you miss or prepared not good enough. This can be bad if you want to make a marketing-style topic for free, but allows to present technical features in really good details: all these sudden discussions really help.In year 2013 Oracle had a booth at the conference and was presented by a bunch of people. Dmitry Lenev presented topic "New features of replication in MySQL 5.6" and Victoria Reznichenko worked on the booth. What was new at the conference this year is greater interest in NoSQL, scale and fast development solutions. This, unfortunately, means not so huge interest in MySQL as it was earlier. However, at the same time, "Common" track was really MySQL track: not only Oracle, but people from other companies presented about it.

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• Is There a Cloud Over OpenWorld?

  - by Tony Berk

  If you have been to OpenWorld in the past, you know it can be overwhelming or at least a bit "large." If this is your first time at OpenWorld, get ready! You are in for a big (or I should say HUGE) treat. The first thing you'll notice when you get to San Francisco is there are a lot of people, buses with "Oracle" posters, large exhibit halls filled with demos, games and tchotchkes from vendors with hot new solutions, and then there are the sessions. Yes, in fact there are over 2000 sessions. How can you possibly sort through 2000 sessions to find the best 20 or so for you? Which are the 1% for you? We will try to help with some insight over the next few weeks.  I'm going start at the highest level. Up in the Clouds! Since I know many people are looking for an update on The Oracle Cloud. We will drill down into the cloud and other topics for CRM and Customer Experience sessions in the next set of posts. Below is a list of some of the Oracle executive keynotes during OpenWorld highlighting The Oracle Cloud and applications related topics (the full list is here). In these sessions you will get details on Oracle's strategy and how Oracle is changing the industry to help our customers be more efficient, effective and innovative. Sunday, September 30 6:00pm - 7:00pm Larry Ellison: Hardware and Software, Engineered to Work Together: Why it's a Different Approach Tuesday, October 2 8:45am - 9:45am Thomas Kurian: The Oracle Cloud: Oracle's Cloud Platform and Application's Strategy Tuesday, October 2 3:30pm - 4:30pm Larry Ellison: The Oracle Cloud: Where Social is Built in Thursday, October 4 9:45am - 10:45am Mark Hurd: See More, Act Faster: Oracle Business Analytics We encourage you to also join the keynotes on the Oracle Database and Cloud Infrastructure and the fascinating partner keynotes, as well. Check the full list on the OpenWorld site. Oh, if you haven't registered yet, what are you waiting for? OpenWorld Registration Details.

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• Deploying InfoPath forms &ndash; idiosyncrasies

  - by PointsToShare

  Well, I have written a sophisticated PowerShell script to expedite the deployment of InfoPath forms - .XSN file.  Along the way by way of trial and error (mostly error and error), I discovered a few little things. Here they are. •    Regardless of how the install command is run – PowerShell or the GUI in Central Admin – SharePoint enwraps the XSN inside a solution – WSP, then installs and deploys the solution. •    The solution is named by concatenating “form-“ with the first 16 characters (or less if the file name is shorter than 16) of the file name and the required WSP at the end. So if the form name was MyInfopathForm.xsn the solution name will be form-MyInfopathForm.wsp, but for WithdrawalOfRequestsForRefund.xsn it will be named form-WithdrawalOfRequ.wsp •    It only gets worse! Had there already been a solution file with the same name, Microsoft appends a three digit number to the name, like MyInfopathForm-123.wsp. Remember a digit is a finger, I suspect a middle finger, so when you deploy the same form – many versions of it, or as it was in my case – testing a script time and again, you’ll end up with many such digit (middle finger) appended solutions, all un-deployed except the last one. This is not a bug. It’s a feature!   Well, there are ways around it. When by hand, remove the solution from the solution store before deploying the form again. In the script I do the same thing. And finally - an important caveat; Make sure that all your form names are unique in the first 16 characters. If you also have a form with the name forWithdrawalOfRequestForRelief.xsn, you’re in trouble! That’s all folks!

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• 12.04 Taking forever for no apparent reason

  - by Sam

  First off, I'd just like to say how much I'm loving Ubuntu so far. It's one of my first steps into Linux, but so far it's blown away Windows in almost every regard. Now, onto my problem. My brothers have some old Dell Dimensions that are barely clinging to life. They were both running XP Home Premium. The 2400 installed just fine, no issues at all. Now, the other computer, the 3000 isn't clearing the screen with the Ubuntu logo and the pulsing dots. I've tried multiple discs, including the exact same one that gave me no issue in the other computer, and I'm at a loss. Does anyone have any suggestions as to where the problem might lay? They're both 32 bit Intel processors, and it's the correct version of Ubuntu. Is it a bad disc drive? Hardware incompatibility? Thanks for any assistance that can be provided. Dell Dimension 2400 Dell Dimension 3000

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• How to pass an interface to Java from Unity code?

  - by nickbadal

  First, let me say that this is my first experience with Unity, so the answer may be right under my nose. I've also posted this question on Unity's answers site, but plugin questions don't seem to be as frequently answered there. I'm trying to create a plugin that allows me to access an SDK from my game. I can call SDK methods just fine using AndroidJavaObject and I can pass data to them with no issue. But there are some SDK methods that require an interface to be passed. For example, my Java function: public void attemptLogin(String username, String password, LoginListener listener); Where listener; is a callback interface. I would normally run this code from Java as such: attemptLogin("username", "password", new LoginListener() { @Override public void onSuccess() { //Yay! do some stuff in the game } @Override public void onFailure(int error) { //Uh oh, find out what happened based on error } }); Is there a way to pass a C# interface through JNI/Unity to my attemptLogin function? Or is there a way to create a mimic-ing interface in C# that I can call from inside the Java code (and pass in any kind of parameter)? Thanks in advance! :)

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• Quaternions, Axis Angles and Rotation Matrices. Which of these should I use for FP Camera?

  - by Afonso Lage

  After 2 weeks of reading many math formulas and such I know what is a Quaternion, an Axis Angles and Matrices. I have made my own math libary (Java) to use on my game (LWJGL). But I'm really confused about all this. I want to have a 3D first person camera. The move (translation) is working fine but the rotation isnt working like I need. I need a camera to rotate arround world Axis and not about its own axis. But even using Quaternions, this doesnt work and no matter how much I read about Euler Angles, everybody says to me dont touch on it! This is a little piece of code that i'm using to make the rotation: Quaternion qPitch = Quaternion.createFromAxis(cameraRotate.x, 1.0f, 0.0f, 0.0f); Quaternion qYaw = Quaternion.createFromAxis(cameraRotate.y, 0.0f, 1.0f, 0.0f); this.multiplicate(qPitch.toMatrix4f().toArray()); this.multiplicate(qYaw.toMatrix4f().toArray()); Where this is a Matrix4f view matrix and cameraRotate is a Vector3f that just handle the angles to rotate obtained from mouse move. So I think I'm doing everything right: Translate the view Matrix Rotate the Move Matrix So, after reading all this, I just want to know: To obtain a correct first person camera rotate, I must need to use Quaternios to make the rotations, but how to rotate around world axis? Thanks for reading it. Best regards, Afonso Lage

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• My partition table is facing limitations; having problems creating more partitions

  - by Terence

  I first noticed an issue when trying to install Linux Mint 14 as a third OS alongside Ubuntu 12.10 and Windows 7 - I was unable to create another partition to install Mint to. Poking around, I realised that I had reached the limit of primary partitions: (from left to right of the table) 1) a ~100 MB primary partition that I meant to use for storing Grub files but never got down to, 2) a 25 GB extended partition, with the entire partition containing an ext4 Ubuntu partition, 3) a ~513 GB partition containing Windows 7, 4) some ~50 GB of unallocated space, and finally 5) a 4 GB swap partition. I decided to wipe off the first ~100 MB partition, which I didn't need anyway. This brought me to a dilemma, however: as Ubuntu, during initial installation, had created an extended partition for itself, which meant that I could not create any more. Having an extended partition for Ubuntu is virtually useless as there is only enough space to contain Ubuntu itself, and the benefits of extended are worthless here. And if I go ahead and install Mint now, I would face the same issue of too many primary partitions in the future should I want to create any more. What I'd really like to do is this: convert the current extended partition into a normal primary partition, and create a new extended partition in the unallocated space for all future partitions. Is this possible, and if so how? Thanks in advance!

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• How to avoid jumping to a solution when under pressure? [closed]

  - by GlenPeterson

  When under a particularly strict programming deadline (like an hour), if I panic at all, my tendency is to jump into coding without a real plan and hope I figure it out as I go along. Given enough time, this can work, but in an interview it's been pretty unsuccessful, if not downright counter-productive. I'm not always comfortable sitting there thinking while the clock ticks away. Is there a checklist or are there techniques to recognize when you understand the problem well enough to start coding? Maybe don't touch the keyboard for the first 5-10 minutes of the problem? At what point do you give up and code a brute-force solution with the hope of reasoning out a better solution later? When is it most productive to think and design more vs. code some experiments to and figure out the design later? Here is a list of techniques for taking a math test and another for taking an oral exam. Is there is a similar list of techniques for handling a programming problem under pressure? ANSWERS: I think this is a valid answer: How To Solve It. I found the link as an answer to Steps to solve or approach towards a solution. There were also some really good tips at Is thinking out loud during an interview really the best strategy?. A great and concise argument for TDD is the first answer to TDD Writing code vs Figuring out the answer to a problem?. My question may be a near-duplicate of that one.

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• tips, guidelines, points to remember for rendering professional code?

  - by ronnieaka

  I'm talking about giving clients professional looking code. The whole nine yards, everything you hardcore professional highly experienced programmers here probably do when coding freelance or for the company you work in. I'm fresh out of college and I'm going into freelance. I just want to be sure that my first few projects leave a good after-taste of professionalism imprinted on the clients' minds. When I Googled what i'm asking here, I was given pages that showed various websites and tools that let you make flashy websites and templates etc. The $N package and such stuff. I can't recall the word experts use for it. Standard, framework [i know that's not it]. English isn't my first language so I'm sorry I don't really don't know the exact phrase for it. That abstract way of writing code so that you don't come across as a sloppy programmer. That above mentioned way for programming websites and desktop software [in python/C/C++/Java]. EDIT: i can work on the accruing vast knowledge and know-how and logic building etc. what i'm asking for is the programming standard/guidelines you guys follow so that the client on seeing code feels that its a professional solution. Like comment blocks, a particular indentation style something like that. Is there any book on it or specific list of points for enterprise type coding by them? Especially here as in my case, for building websites [php for now..], and desktop software [c/c++/java/python]

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• Freeze on Boot WindowsXP

  - by kyle

  Ok first off I know I should have Windows 7 but i don't Its a really old computer and i'm not sure if it can run the latest OS of ubuntu but i'm trying any whay so here are my specs or what i could have gathered from the computer(viruses are every where and most of the drivers are gone) Specs OS WindowsXP(it isn't letting me know which one that is blocked) Graphics card(can't access device manger it is blocked also) graphics card is 2003-2004 era though ram 512mb last time i checked USB(Drivers Gone) Wireless Card(Drivers Gone) Lan Card(Drivers Gone) Audio(Drivers Gone) CD Drive (it runs and works but i can't check its properties that's blocked to) Computer Dell Inspiron 600m Good News I have the Driver CD for everything Bad News I Don't have the OS CD I know the Computer is trash but i want to flash it anyway and just install linux(ubuntu) The second problem is it doesn't even want to load the CD all the way it is just stuck at the Ubuntu Screen with all the bubbles orange and if i resart it just does it again. any help would be nice. EDIT: okay i tried the first comment and it said i need a firmware file from http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware the firmware is b43/ucode5.fw, b43-open/ucode5.fw is there any other way of installing this firmware without being in the Ubuntu because what I have read is I need to be in Ubuntu to do this... Thanks for all the help you are giving me i have read your comments but i don't want to wait another two hours downloading that if i can get it working on this...

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• Workflow: Deploy Operating Systems

  - by Owen Allen

  The Deploy Operating Systems workflow is a workflow document that we added recently. It shows you how to get operating systems up and running in your environment. It's mostly linear, but it's a bit more complicated than some of the others. It's built around a pair of images. In both images, the left side shows the prerequisites for the whole process. Before you can deploy operating systems, you have to have Ops Center fully installed, with libraries set up and hardware already discovered. Once you've done that preparation, the first image walks you through all of the OS deployment steps. First you discover existing operating systems, then you provision Oracle Solaris 10 or Oracle Solaris 11. If you're not planning on using virtualization, then your deployment is done, and you're directed to the operate workflows. If you are interested in virtualization, though, you go on to the second image: The second image walks you through deploying virtualization, sending you to the Deploying Oracle Solaris 10 Zones, Deploying Oracle Solaris 11 Zones, or Deploying Oracle VM Server for SPARC workflows, depending on what kind of virtualization you're planning on using. Once you've done that, you're ready to go on to the operation workflows.

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• EOFs in Solaris 11

  - by nospam(at)example.com (Joerg Moellenkamp)

  Well ? from comments here and elsewhere, the two most worst things seemed to be the the removal of 32-bit support and removal of support for certain components. Just to set things into perspective: Solaris 10 was released 2005, the newsest class of machines not supported by it were the Ultra1. This one was released 1995. The UltraSPARC-Systems not able to run on Solaris 11 were released 2001. Well ? we have 2011 now ?. Regarding 32-bit support: Well ? I don't think "playing around with Solaris on old gear" is the problem. At first, most people are playing around with virtual machines. But there is something different: 64-bit computing was introduced for x86 in 2003 (yes ? it's really that old). I think this move is more hurting to the people using boards with the first-gen Intel Atom "Silverthorne" as small file servers. And then Solaris 10 won't disappear with Solaris 11

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• How to implement isValid correctly?

  - by Songo

  I'm trying to provide a mechanism for validating my object like this: class SomeObject { private $_inputString; private $_errors=array(); public function __construct($inputString) { $this->_inputString = $inputString; } public function getErrors() { return $this->_errors; } public function isValid() { $isValid = preg_match("/Some regular expression here/", $this->_inputString); if($isValid==0){ $this->_errors[]= 'Error was found in the input'; } return $isValid==1; } } Then when I'm testing my code I'm doing it like this: $obj = new SomeObject('an INVALID input string'); $isValid = $obj->isValid(); $errors=$obj->getErrors(); $this->assertFalse($isValid); $this->assertNotEmpty($errors); Now the test passes correctly, but I noticed a design problem here. What if the user called $obj->getErrors() before calling $obj->isValid()? The test will fail because the user has to validate the object first before checking the error resulting from validation. I think this way the user depends on a sequence of action to work properly which I think is a bad thing because it exposes the internal behaviour of the class. How do I solve this problem? Should I tell the user explicitly to validate first? Where do I mention that? Should I change the way I validate? Is there a better solution for this? UPDATE: I'm still developing the class so changes are easy and renaming functions and refactoring them is possible.

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• SSMS Tools Pack 2.7 is released. New website, improved licensing and features.

  - by Mladen Prajdic

  New website Nice, isn't it? Cleaner, simpler, better looking and more modern. If you have any suggestions for further improvements I'd be glad to hear them. Simpler licensing With SSMS tools Pack 2.7 the licensing is finally where it should be. It is now based on the activate/deactivate model. This way you can move a license from machine to machine with simple deactivation on one and reactivation on another machine. Much better, no? Because of very good feedback I have added an option for 6 machines and lowered the 4 machines option to 3 machines. This should make it much simpler for you to choose the right option for yourself. Improved features Version 2.5.3 was already extremely stable and 2.7 continues with that tradition. Because of that I could fully focus on features and why 3.0 will rock even more that 2.7! ;) In version 2.7 I have addressed quite a few improvements you were requesting for a while now. SQL History This is probably the biggest time saver out there, therefore it's only fair it gets a few important updates. If you have an existing .sql file opened, the Window Content History now saves your code to that existing file and also makes a backup in the SQL History log default location. Search is still done through the SQL History log but the Tab Sessions Restore opens your existing .sql file. This way you don't have to remember to save your existing files by yourself anymore. A bug when you couldn't search properly if you copied the log files to a new location was fixed. Unfortunately this removed the option to filter a search with the time component. The smallest search interval is now one day. The SSMS Tools Pack now remembers the visibility of the Current Window History window when you exit SSMS. SQL Snippets You can now set the position of the cursor in your snippets by placing {C} somewhere in your snippet. It's a small improvement but can be a huge time saver since you don't have to move through the snippet to the desired location anymore. Run script on multiple databases Database choices can now be saved with a name and then loaded again next time. You can also choose to run the script in a new window for each chosen database. Search through grid results You can now go previous/next search result with the Prev/Next control inside the search window. This is extremely useful if you have a large resultset. IT saves you the scrolling. CRUD generator Four new variables have been added: |CurrentDate| writes current date in format yyyy-MM-dd to your script |CurrentTime| writes current time in 24h format HH:mm:ss to your script |CurrentWinUser| writes current Windows logged on user to your script |CurrentSqlUser| writes current SQL logged on login to your script This was actually quite a requested feature so if you have any other ideas for extra variables, do let me know. That's about it. I hope you're going to enjoy this version as much as the previous ones. Have fun!

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• What’s ‘default’ for?

  - by Strenium

  Sometimes there's a need to communicate explicitly that value variable is yet to be "initialized" or in other words - we’ve never changed it from its' default value. Perhaps "initialized" is not the right word since a value type will always have some sort of value (even a nullable one) but it's just that - how do we tell? Of course an 'int' would be 0, an 'enum' would the first defined value of a given enum and so on – we sure can make this kind of check "by hand" but eventually it would get a bit messy. There's a more elegant way with a use of little-known functionality of: 'default'Let’s just say we have a simple Enum: Simple Enum namespace xxx.Common.Domain{    public enum SimpleEnum    {        White = 1,         Black = 2,         Red = 3    }}   In case below we set the value of the enum to ‘White’ which happens to be a first and therefore default value for the enum. So the snippet below will set value of the ‘isDefault’ Boolean to ‘true’. 'True' Case SimpleEnum simpleEnum = SimpleEnum.White;bool isDefault; /* btw this one is 'false' by default */ isDefault = simpleEnum == default(SimpleEnum) ? true : false; /* default value 'white' */   Here we set the value to ‘Red’ and ‘default’ will tell us whether or not this the default value for this enum type. In this case: ‘false’. 'False' Case simpleEnum = SimpleEnum.Red; /* change from default */isDefault = simpleEnum == default(SimpleEnum) ? true : false; /* value is not default any longer */ Same 'default' functionality can also be applied to DateTimes, value types and other custom types as well. Sweet ‘n Short. Happy Coding!

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• ubuntu live cd start up error

  - by Emiel

  First off, I'm new to the Linux scene. This is my first attempt to make a single boot installation for Ubuntu. I tried it for a few days in dual boot with win7 and I was sold, so i removed the tumor my pc had to endure for so long (sorry laptop) and installed Ubuntu from an usb boot device. My dual boot was as follows: Windows 7 was installed on partition C from hdd1, the windows installer for Ubuntu installed Ubuntu on partition I on that same hdd, hdd1. In the live cd installation I did the normal execution for removing windows and it said that after the installation my partition would be 320gb big, that is the total size of my hdd, so I automatically assumed that it would format my whole hdd. Now the installation has completed and it tells me to restart my system, and here comes the problem: now I get a dashing white cursor on my screen after the BIOS load and it won't budge... it just stands there and it doesn't move on or load Ubuntu, the system gets very hot at this point... Then I tried to reinstall using the same live CD, it is still on my USB drive, but when I boot from the USB, I get the error: no such file with some address and the a grub rescue. What to do? I can get hold of a win7 copy, but I don't really want to use that crap again... Thanks for helping me out. Kind regards, Emiel

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• Cube rotation DX10

  - by German

  Well I'm reading the Frank's Luna DirectX10 book and, while I'm trying to understand the first demo, I found something that's not very clear at least for me. In the updateScene method, when I press A, S, W or D, the angles mTheta and mPhi change, but after that, there are three lines of code that I don't understand exactly what they do: // Convert Spherical to Cartesian coordinates: mPhi measured from +y // and mTheta measured counterclockwise from -z. float x = 5.0f*sinf(mPhi)*sinf(mTheta); float z = -5.0f*sinf(mPhi)*cosf(mTheta); float y = 5.0f*cosf(mPhi); I mean, this explains that they do, it says that it converts the spherical coordinates to cartesian coordinates, but, mathematically, why? why the x value is calculated by the product of the sins of both angles? And the z by the product of the sine and cosine? and why the y just uses the cosine? After that, those values (x, y and z) are used to build the view matrix. The book doesn't explain (mathematically) why those values are calculated like that (and I didn't find anything to help me to understand it at the first Part of the book: "Mathematical prerequisites"), so it would be good if someone could explain me what exactly happen in those code lines or just give me a link that helps me to understand the math part. Thanks in advance!

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• How to quickly open an application for the 2nd time via Dash?

  - by Andre

  When I want to open an application via Dash, I just hit Super, type the first letters, and hit Enter. For instance: Super, "drop", Enter to start Dropbox. However, if I want to start an application again, Dash remembers it, but I cannot start it by hitting ENTER although "drop" is still in there, and Dropbox is in the first position. Why? How can I (without using the mouse) start an application again? UPDATE: better example (hopefully): Super ... type "ged" ... Enter to start Gedit close Gedit Super ... and now? "ged" is remembered, Gedit is still in pole position ready to be started. However, hitting Enter does not work. How can I start an application again? - Without using the mouse or retyping? If I have to retype, it makes no sense that Dash remembers the application and my typed letters. I assume there is a way to open the application again by just: Super + Enter (or something similar). Thanks!

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• I don't understand how TDD helps me get a good design if I need a design to start testing it

  - by Michael Stum

  I'm trying to wrap my head around TDD, specifically the development part. I've looked at some books, but the ones I found mainly tackle the testing part - the History of NUnit, why testing is good, Red/Green/Refactor and how to create a String Calculator. Good stuff, but that's "just" Unit Testing, not TDD. Specifically, I don't understand how TDD helps me get a good design if I need a Design to start testing it. To illustrate, imagine these 3 requirements: A catalog needs to have a list of products The catalog should remember which products a user viewed Users should be able to search for a product At this points, many books pull a magic rabbit out of a hat and just dive into "Testing the ProductService", but they don't explain how they came to the conclusion that there is a ProductService in the first place. That is the "Development" part in TDD that I'm trying to understand. There needs to be an existing design, but stuff outside of entity-services (that is: There is a Product, so there should be a ProductService) is nowhere to be found (e.g., the second requirement requires me to have some concept of a User, but where would I put the functionality to remind? And is Search a feature of the ProductService or a separate SearchService? How would I know which I should choose?) According to SOLID, I would need a UserService, but if I design a system without TDD, I might end up with a whole bunch of Single-Method Services. Isn't TDD intended to make me discover my design in the first place? I'm a .net developer, but Java resources would also work. I feel that there doesn't seem to be a real sample application or book that deals with a real line of business application. Can someone provide a clear example that illustrates the process of creating a design using TDD?

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• An online version of ClearTrace

  - by Bill Graziano

  When I visit clients for the first time and conduct a performance review I introduce them to ClearTrace. It’s still the best way I know to identify exactly which queries are consuming the most resources.  The downside is that it needs to be downloaded and create a database to store the results.  I finally decided it would be easier if I could just upload a trace immediately. You can find the online version of ClearTrace at TraceTune.com.  It provides a simple way to upload a trace file and see exactly which stored procedures or SQL statements consume the most CPU and disk.   This is still a work in progress as I try to determine exactly which features from ClearTrace are important.  I’ve also limited the file upload to 10MB in this beta release.  That might not sound like much but I get over 20,000 events using this stored procedure to generate the trace. If you’re looking for something to do on a Friday, I’d suggest a little performance tuning.  Generating 10MB of trace data doesn’t take long at all and in a short time you’ll see exactly which SQL statements you need to tune first.

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• Moving to New Machine... also upgrade to 64bit. What steps?

  - by Kendor

  I am about to move to a new Lenovo X201 from current X61. Current setup has separate \home, separate swap file, also separate \Data partition. Am currently running 10.04 32 bit. Am considering running 64 bit on new machine because I will now have 8 GB of RAM. And would like to also move to 10.10. Ideally I would like preserve as much of my current setup as possible... New machine has Win7 on it, but will blow that away, as I've made a clonezilla copy of it, and will use VirtualBox for when I need Windows. Can someone suggest a good step by step for me? I'm networked to a NAS and also have plenty of external USB storage in case I need intermediary steps. So do I set up new machine first with 64bit 10.10, with partition scheme I want? then rsnyc over \home from old machine (over write target home)? Do I need to upgrade the X61 first to 10.10?

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• Welcome to the Java Training Beat!

  - by tmcginn

  We are a group of dedicated training developers for Java, located in the US, India, and now Mexico. In this blog we will announce new training content and events that might be of interest to our readers. In this first installment of the Java Training Beat, I would like to introduce three new Oracle By Example (OBE) modules I recently released and posted to the Oracle Online Learning Library. Creating a Simple Java Message Service (JMS) Producer with NetBeans and GlassFish - covers how to create a simple text message producer with NetBeans 7 and GlassFish. Creating Java Message Service (JMS) Resources in WebLogic Server 12c - covers how to create JMS resources using the console and WebLogic Server 12c. With this tutorial, you can replicate the results of the first tutorial in WebLogic. Creating a Publish/Subscribe Model with Message-Driven Beans and GlassFish Server - covers how to create a publish/subscribe application using JMS. This tutorial includes a short case study that includes a JSF front-end application that sends a hotel reservation request object to the server as a MapMessage. Hope you find these useful!  And do check out the Online Learning Library - we have a wide range of additional content posted and more being added every month!

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