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  • Oracle University Partner Enablement-Update (Week 13)

    - by swalker
    Get ready for Fusion Applications Implementations Oracle University has scheduled the first implementation courses. To view see: Italy France The Netherlands: UK If you can’t travel to these countries, why don’t you try a Live Virtual Class? All courses can be booked via the websites. For more information, assistance in booking and scheduling requests contact your local Oracle University Service Desk. Bleiben Sie in Verbindung mit Oracle University: LinkedIn OracleMix Twitter Facebook Google+

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  • OT: Improbable use for an iPad?

    - by merrillaldrich
    Here's an interesting tidbit: I have noticed an even more pronounced trend toward centralized or virtual workstations lately. Both my wife and I can sit at home, as we are now, at the dining room table and work on our laptops (exciting life, I know!) but both of us are not actually working locally on these machines. We are both remoting into machines at our respective workplaces. Hers is a desktop machine physically located at her desk, while mine is a virtual workstation in my company's data center...(read more)

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  • Free Learning Resources for Visual Studio 2010 and SharePoint Server 2010

    - by Enrique Lima
    Visual Studio Resources From the Microsoft Press blog:  http://blogs.msdn.com/microsoft_press/archive/2010/05/13/free-ebook-moving-to-microsoft-visual-studio-2010-draft-preview-ii.aspx Keybinding Cards: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=92ced922-d505-457a-8c9c-84036160639f SharePoint Resources From the Microsoft Office site on Training courses for End Users http://office2010.microsoft.com/en-us/sharepoint-server-help/take-sharepoint-server-2010-training-at-your-desk-HA101859255.aspx

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  • There is Hardly a Scratch on It! [Humorous Image]

    - by Asian Angel
    That hard drive has lots of life left in it… View the Entire Set of Photos of this Hard Drive (29 Image Set) I finally removed this failed SCSI drive 2 years after the server reported it had failed. Yeah that report seems about right. [via Fail Desk] HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization HTG Explains: What Is RSS and How Can I Benefit From Using It?

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  • Best boost to productivity : SSD or second screen ?

    - by jfoucher
    Within the same budget, which do you think would be the best boost to productivity for general web development : An SSD as boot drive, or a second screen ? I currently use a 16.4" laptop with full HD screen and 7200 RPM HDD Thanks EDIT: In light of the answers so far, I add that I work at home and while I have a home office with a proper desk, I'm just as often coding sitting on the sofa in the living room.

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  • Oracle Mise à jour Partner Enablement Oracle University (Week 13)

    - by swalker
    Get ready for Fusion Applications Implementations Oracle University has scheduled the first Fusion Applications Implementation courses in France. If you can’t find an In Class event for the course you need, why don’t you try a Live Virtual Class? Check out the Location: Online. All courses can be booked via the websites. For more information, assistance in booking and scheduling requests contact your local Oracle University Service Desk. Restez connecté à Oracle University : LinkedIn OracleMix Twitter Facebook Google+

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  • New customer references for Exadata projects

    - by Javier Puerta
    Denver Regional Transportation District (USA)  Exadata, BI Suite EE, Oracle Linux, Oracle ACSDenver Regional Transportation District Deploys Engineered System in One Week for a Four-Fold Reduction in Database Operations and Management Resources Published: August 21, 2012 Balubaid Group (Saudi Arabia) Exadata, SPARC M4000, Solaris, OBIEE 11gBalubaid Group of Companies Reduces Help-Desk Complaints by 75%, Improves Business Continuity and System Response Published August 21, 2012 All customer reference collateral can be found on Oracle.com/customers. Search by content type, product, industry, region, and even keywords.

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  • Office lights on or off in programming department? How to decide? [closed]

    - by smp7d
    At my company, the programmers who sit in the same area are constantly fighting over whether the lights stay on or off. Because there is no official policy it makes it a particularly sticky situation. We are a typical cube-farm and we have those typical cube-farm fluorescent lights and smaller ones at our desks. With the lights off, it is difficult to read and you would probably need to turn on your desk light (which some people do anyway). All programmers in our department do most of their reading on their monitor because of the nature of our business. Some feel that we should have a vote to decide whether the lights stay on or off. A couple who prefer 'lights on' feel that the vote would need to be unanimous to turn them off as having them on is the more natural office setting. Those who want them off point out that all other departments keep their lights off. I have heard all of the arguments: -Fluorescent lights cause eye strain -Reading in dark causes eye strain -The desk lights can be used if light is needed -People from other departments feel uncomfortable approaching us in the "dark" -The monitors are harder to see in the light ... Right now, some of the developers turn off the lights and some turn them on. It really just depends who last walked by the switch. I am a bit sick of the controversy as it feels a bit childish at the moment. I'm tired of hearing about it and I'm tired of having to talk about it. I tried to help them decide but as I explained, voting wasn't enough. Do other programming departments have this same argument? What is the standard or traditionally accepted option in a programming area? Are there any good reasons for one way or the other outside of preference? How can we decide fairly? EDIT Just a little more info... We do not have clients/visitors come into our office. We do have windows and hall lights that make our environment plenty bearable with the lights off. It kind of resembles a meeting room that has the lights off during a powerpoint presentation.

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  • Logitech Performance Mouse MX (and More) Review

    The glass-topped desk -- which has stymied optical and laser mice for years -- has been conquered at last by Logitech's ultimate tracking technology. The annoyance of needing separate USB receivers for your cordless mouse and keyboard is history, too.

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  • Linux ? ZFS ????????

    - by katsumii
    PR????????????????????????  @IT Special PR:???.com?VPS???! ZFS on Linux?????????ZFS???????????????????????????????????????5 ???Java????????????PC??ZFS????????????? Solaris and OS X (James Gosling: on the Java Road)when I get back to my desk and the USB drive reconnects, ZFS magically updates the mirror and I have an incredibly fast backup. If I want to use backups for going back in time, ZFS snapshots are perfect and fast.???????????VPS?????ISO????????????????????Oracle Linux???????????? Solaris ?????????? 

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  • Oracle University (Week 13)

    - by swalker
    Get ready for Fusion Applications Implementations Oracle University has scheduled the first implementation courses. To view see: Italy France The Netherlands: UK If you can’t travel to these countries, why don’t you try a Live Virtual Class? All courses can be booked via the websites. For more information, assistance in booking and scheduling requests contact your local Oracle University Service Desk. Manténgase conectado a Oracle University: LinkedIn OracleMix Twitter Facebook Google+

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  • Productivity strategies for one developer using many PCs

    - by DeveloperDon
    In a talk about time management, a famous computer scientist said: "One machine in your life is the right number." He recommended a laptop with a docking station. After trying this approach for about a month, I miss my more powerful desktop (i7 quad core hyperthread), but it is not in my technology road map (or budget) to upgrade from my old Intel Core 2 Duo (2006) notebook this year. What strategies can help me use the desktop while at my desk and without much manual effort the notebook when I am on the go?

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  • The ‘Coolest’ Server You will Ever See [Video]

    - by Asian Angel
    What is a little bit of snow-covered server between friends, right? From YouTube: This is an experimental Free Air Cooling setup called a Helsinki Chamber. You can learn more about this experimental server cooling technology here. Snow is not a problem for servers in Finland [via Fail Desk] Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus?

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  • Eager to Learn more about MySQL?(Week 40)

    - by rituchhibber
    Are you a SQL programmer eager to know more?Oracle University is pleased to announce the availability of a new course in Training on Demand format : MySQL Performance Tuning.Why wait to get the training you need? Learn Oracle from Oracle today. Check out the demo to see how it works.Take a look at the new Training on Demand  MySQL Certification Packages.Please note: your OPN discount is applied to the standard price shown on the website.For more information, assistance and bookings contact your local Oracle University Service Desk.

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  • Eager to Learn More About Oracle Solaris 11?

    - by tfryer
    Are you a Solaris 11 System Administrator eager to know more? Oracle University is pleased to announce the release of two new courses: Solaris 11 ZFS Administration Oracle Solaris 11 Zones Administration Remember: your OPN discount is added to the standard prices shown on the website. Also check out the updated Oracle Solaris 11 Learning Path. For more information, assistance and bookings, contact your local Oracle University Service Desk.

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  • ViewSonic PC Mini VOT132 Review

    Is that a paperweight on your desk? Oops, sorry, it's a PC -- a space- and energy-saving desktop hardly bigger than a VHS cassette, priced at just $449, but with a dual-core Intel Atom CPU and all the power that office productivity workers need.

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  • Logging out

    - by chandan
    After twelve years at Sun and Oracle, and running this blog for eight years, about two hundred postings, one domain name change and getting thousands of security vulnerabilities fixed I am signing off from Oracle's product security desk today. Working for Sun and Oracle was an incredible experience! I am very fortunate to have had the opportunity to know and learn from so many extraordinary people. See chandanlog.wordpress.com for future postings. I can also be found on Linkedin

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  • What is the most likely cause to a Blue Screen of Death when the user presses Ctrl-Alt-Delete?

    - by Jay
    My wife is experiencing this with her work laptop--she presses Ctrl-Alt-Delete to lock and she gets the BSOD. The first troubleshooting step is usually to "re-image", and it's locked down. So with this question, I am asking whether the behavior is unique enough that someone in the stack-universe knows exactly what this is (something I can tell her to tell her help desk support). Update: help desk said to order more RAM. Alt-tabbing caused the same behavior today. And...she learned that multiple users are affected. I'm not sure I'll be able to clean any additional info that will help w/ troubleshooting. I'll leave the question here for a bit and if an answer ends up being the actual solution, I'll accept it. If not, I think I should probably remove the question (i'll check meta). Update #2.5: The cause appears to be a ctrl-alt-delete keystroke while Sales Team Configurator is open. This can either be to lock the screen (there are workaround in answers already present) or to unlock the screen (no workaround for that).

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  • Minimum permissions needed to create a user Home Folder in Windows Active Directory

    - by Jim
    We would like the Help Desk to have the responsibility of creating User Home folders instead of our 2nd level support. The help desk global group is already an Account Operator, so in Active Directory they are able to edit all User Attributes just fine. The problem is figuring out the minimum level of permissions needed on the File Server to create the home share, with out giving them access to everyone home share. So if they open AD Users and Computer, open the properties for a user, and enter \home\users\%username% in the profile tab and then click OK, they get the following error. The \home\users\username home folder was not created because you do not have create access on the server. The user account has been updated with the new home folder value but you must create the directory manually after obtaining the required access right. Right now I have given the Helpdesk group Full Control on the root folder only (no files or subdirectories) The directory is actually created, but the permissions on the newly created folder only show administrators full control, and no permissions for the configured user account. It sure sounds like I'd have to make the helpdesk local admins on the file servers, which is what I'd like to avoid. Especially since the file servers are a large cluster hosting much much more than the entire orgs home share structure.

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  • Looking for a small, portable, port-mirroring ethernet switch.

    - by user37244
    I recently had a mac go haywire, taking half a minute or more to get www.google.com loaded. Getting its owner to give up the machine for repair was like pulling teeth - they were insisting that it must be something to do with the network, since so much had changed with the local configuration at about the same time their box went haywire. I eventually set up a port mirror to a box that I could remote to so I could show that the mac was only irregularly getting packets onto the network. Demonstrating this faced an additional challenge: the latency of the remote desktop software I was using meant that I had to point to timestamps instead of just the moment the packet flashed up on the screen as my evidence. This particular user was the reason this was so challenging this time around, but I would like to have a box that I can cart from desk to desk to use wireshark on my laptop at any station where I need it. 3com, cisco, netgear, etc. (ad nauseum), all make switches that can be configured for port mirroring, but in my case, the smaller, the better. For the sake of my sanity, I'll probably end up running it off a battery anyway. If my laptop had two ethernet ports, this would be easy. So, whaddya recommand for a device that requires 0 configuration at each powerup (though I'm fine with poking at it for a while to set it up initially.) Small, light, and cheap enough to get it past purchasing? Thanks,

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  • Dynamic DNS Updates with Wireless and Wired interfaces

    - by Phaedrus
    We have offices full of Windows & Mac users who obtain IP addresses from a Windows DHCP server, which in turn updates Dynamic DNS entries. We are noticing major inconsistencies with the entries, and have found that the problem is occurring more on Macs than on windows, and even more when users are frequently switching from wired to wireless adapter, which makes sense, as this sequence occurs: User enables wired adapter and registers Proper DNS User enables wireless adapter and registers 2nd proper DNS entry user switches off wireless manually and 2nd entry remains improperly until scavenge. Our help desk folks rely heavily (maybe more than they should) on the dynamic entries as part of their business process. For example, the user submits a help desk ticket, and the staff member expects to be able to remote desktop to their machine by hostname, which is hyperlinked in the helpdesk ticketing app. We have implemented multiple solutions & band-aids to different symptoms of the problems such as: Using DNS Reservations for Macintosh PCs Using DNS Scavenging to remove old records Switching from a Cisco DHCP server to the Windows DHCP Server But no matter what we do, it seems impossible to maintain perfect records. Has anyone encountered this problem before? What is industry best practice? Comments & Suggestions are much appreciated, /P

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  • Productivity Tips

    - by Brian T. Jackett
    A few months ago during my first end of year review at Microsoft I was doing an assessment of my year.  One of my personal goals to come out of this reflection was to improve my personal productivity.  While I hear many people say “I wish I had more hours in the day so that I could get more done” I feel like that is the wrong approach.  There is an inherent assumption that you are being productive with your time that you already have and thus more time would allow you to be as productive given more time.    Instead of wishing I could add more hours to the day I’ve begun adopting a number of processes or behavior changes in my personal life to make better use of my time with the goal of improving productivity.  The areas of focus are as follows: Focus Processes Tools Personal health Email Note: A number of these topics have spawned from reading Scott Hanselman’s blog posts on productivity, reading of David Allen’s book Getting Things Done, and discussions with friends and coworkers who had great insights into this topic.   Focus Pre-reading / viewing: Overcome your work addiction Millennials paralyzed by choice Its Not What You Read Its What You Ignore (Scott Hanselman video)    I highly recommend Scott Hanselman’s video above and this post before continuing with this article.  It is well worth the 40+ mins price of admission for the video and couple minutes for article.  One key takeaway for me was listing out my activities in an average week and realizing which ones held little or no value to me.  We all have a finite amount of time to work each day.  Do you know how much time and effort you spend on various aspects of your life (family, friends, religion, work, personal happiness, etc.)?  Do your actions and commitments reflect your priorities?    The biggest time consumers with little value for me were time spent on social media services (Twitter and Facebook), playing an MMO video game, and watching TV.  I still check up on Facebook, Twitter, Microsoft internal chat forums, and other services to keep contact with others but I’ve reduced that time significantly.  As for TV I’ve cut the cord and no longer subscribe to cable TV.  Instead I use Netflix, RedBox, and over the air channels but again with reduced time consumption.  With the time I’ve freed up I’m back to working out 2-3 times a week and reading 4 nights a week (both of which I had been neglecting previously).  I’ll mention a few tools for helping measure your time in the Tools section.   Processes    Do not multi-task.  I’ll say it again.  Do not multi-task.  There is no such thing as multi tasking.  The human brain is optimized to work on one thing at a time.  When you are “multi-tasking” you are really doing 2 or more things at less than 100%, usually by a wide margin.  I take pride in my work and when I’m doing something less than 100% the results typically degrade rapidly.    Now there are some ways of bending the rules of physics for this one.  There is the notion of getting a double amount of work done in the same timeframe.  Some examples would be listening to podcasts / watching a movie while working out, using a treadmill as your work desk, or reading while in the bathroom.    Personally I’ve found good results in combining one task that does not require focus (making dinner, playing certain video games, working out) and one task that does (watching a movie, listening to podcasts).  I believe this is related to me being a visual and kinesthetic (using my hands or actually doing it) learner.  I’m terrible with auditory learning.  My fiance and I joke that sometimes we talk and talk to each other but never really hear each other.   Goals / Tasks    Goals can give us direction in life and a sense of accomplishment when we complete them.  Goals can also overwhelm us and give us a sense of failure when we don’t complete them.  I propose that you shift your perspective and not dwell on all of the things that you haven’t gotten done, but focus instead on regularly setting measureable goals that are within reason of accomplishing.    At the end of each time frame have a retrospective to review your progress.  Do not feel guilty about what you did not accomplish.  Feel proud of what you did accomplish and readjust your goals for the next time frame to more attainable goals.  Here is a sample schedule I’ve seen proposed by some.  I have not consistently set goals for each timeframe, but I do typically set 3 small goals a day (this blog post is #2 for today). Each day set 3 small goals Each week set 3 medium goals Each month set 1 large goal Each year set 2 very large goals   Tools    Tools are an extension of our human body.  They help us extend beyond what we can physically and mentally do.  Below are some tools I use almost daily or have found useful as of late. Disclaimer: I am not getting endorsed to promote any of these products.  I just happen to like them and find them useful. Instapaper – Save internet links for reading later.  There are many tools like this but I’ve found this to be a great one.  There is even a “read it later” JavaScript button you can add to your browser so when you navigate to a site it will then add this to your list. Stacks for Instapaper – A Windows Phone 7 app for reading my Instapaper articles on the go.  It does require a subscription to Instapaper (nominal $3 every three months) but is easily worth the cost.  Alternatively you can set up your Kindle to sync with Instapaper easily but I haven’t done so. SlapDash Podcast – Apps for Windows Phone and  Windows 8 (possibly other platforms) to sync podcast viewing / listening across multiple devices.  Now that I have my Surface RT device (which I love) this is making my consumption easier to manage. Feed Reader – Simple Windows 8 app for quickly catching up on my RSS feeds.  I used to have hundreds of unread items all the time.  Now I’m down to 20-50 regularly and it is much easier and faster to consume on my Surface RT.  There is also a free version (which I use) and I can’t see much different between the free and paid versions currently. Rescue Time – Have you ever wondered how much time you’ve spent on websites vs. email vs. “doing work”?  This service tracks your computer actions and then lets you report on them.  This can help you quantitatively identify areas where your actions are not in line with your priorities. PowerShell – Windows automation tool.  It is now built into every client and server OS.  This tool has saved me days (and I mean the full 24 hrs worth) of time and effort in the past year alone.  If you haven’t started learning PowerShell and you administrating any Windows OS or server product you need to start today. Various blogging tools – I wrote a post a couple years ago called How I Blog about my blogging process and tools used.  Almost all of it still applies today.   Personal Health    Some of these may be common sense or debatable, but I’ve found them to help prioritize my daily activities. Get plenty of sleep on a regular basis.  Sacrificing sleep too many nights a week negatively impacts your cognition, attitude, and overall health. Exercise at least three days.  Exercise could be lifting weights, taking the stairs up multiple flights of stairs, walking for 20 mins, or a number of other "non-traditional” activities.  I find that regular exercise helps with sleep and improves my overall attitude. Eat a well balanced diet.  Too much sugar, caffeine, junk food, etc. are not good for your body.  This is not a matter of losing weight but taking care of your body and helping you perform at your peak potential.   Email    Email can be one of the biggest time consumers (i.e. waster) if you aren’t careful. Time box your email usage.  Set a meeting invite for yourself if necessary to limit how much time you spend checking email. Use rules to prioritize your email.  Email from external customers, my manager, or include me directly on the To line go into my inbox.  Everything else goes a level down and I have 30+ rules to further sort it, mostly distribution lists. Use keyboard shortcuts (when available).  I use Outlook for my primary email and am constantly hitting Alt + S to send, Ctrl + 1 for my inbox, Ctrl + 2 for my calendar, Space / Tab / Shift + Tab to mark items as read, and a number of other useful commands.  Learn them and you’ll see your speed getting through emails increase. Keep emails short.  No one Few people like reading through long emails.  The first line should state exactly why you are sending the email followed by a 3-4 lines to support it.  Anything longer might be better suited as a phone call or in person discussion.   Conclusion    In this post I walked through various tips and tricks I’ve found for improving personal productivity.  It is a mix of re-focusing on the things that matter, using tools to assist in your efforts, and cutting out actions that are not aligned with your priorities.  I originally had a whole section on keyboard shortcuts, but with my recent purchase of the Surface RT I’m finding that touch gestures have replaced numerous keyboard commands that I used to need.  I see a big future in touch enabled devices.  Hopefully some of these tips help you out.  If you have any tools, tips, or ideas you would like to share feel free to add in the comments section.         -Frog Out   Links Scott Hanselman Productivity posts http://www.hanselman.com/blog/CategoryView.aspx?category=Productivity Overcome your work addiction http://blogs.hbr.org/hbsfaculty/2012/05/overcome-your-work-addiction.html?awid=5512355740280659420-3271   Millennials paralyzed by choice http://priyaparker.com/blog/millennials-paralyzed-by-choice   Its Not What You Read Its What You Ignore (video) http://www.hanselman.com/blog/ItsNotWhatYouReadItsWhatYouIgnoreVideoOfScottHanselmansPersonalProductivityTips.aspx   Cutting the cord – Jeff Blankenburg http://www.jeffblankenburg.com/2011/04/06/cutting-the-cord/   Building a sitting standing desk – Eric Harlan http://www.ericharlan.com/Everything_Else/building-a-sitting-standing-desk-a229.html   Instapaper http://www.instapaper.com/u   Stacks for Instapaper http://www.stacksforinstapaper.com/   Slapdash Podcast Windows Phone -  http://www.windowsphone.com/en-us/store/app/slapdash-podcasts/90e8b121-080b-e011-9264-00237de2db9e Windows 8 - http://apps.microsoft.com/webpdp/en-us/app/slapdash-podcasts/0c62e66a-f2e4-4403-af88-3430a821741e/m/ROW   Feed Reader http://apps.microsoft.com/webpdp/en-us/app/feed-reader/d03199c9-8e08-469a-bda1-7963099840cc/m/ROW   Rescue Time http://www.rescuetime.com/   PowerShell Script Center http://technet.microsoft.com/en-us/scriptcenter/bb410849.aspx

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  • Passing Strings by Ref

    - by SGWellens
    Humbled yet again…DOH! No matter how much experience you acquire, no matter how smart you may be, no matter how hard you study, it is impossible to keep fully up to date on all the nuances of the technology we are exposed to. There will always be gaps in our knowledge: Little 'dead zones' of uncertainty. For me, this time, it was about passing string parameters to functions. I thought I knew this stuff cold. First, a little review... Value Types and Ref Integers and structs are value types (as opposed to reference types). When declared locally, their memory storage is on the stack; not on the heap. When passed to a function, the function gets a copy of the data and works on the copy. If a function needs to change a value type, you need to use the ref keyword.  Here's an example:     // ---- declaration -----------------     public struct MyStruct    {        public string StrTag;    }     // ---- functions -----------------------     void SetMyStruct(MyStruct myStruct)     // pass by value    {        myStruct.StrTag = "BBB";    }     void SetMyStruct(ref MyStruct myStruct)  // pass by ref    {        myStruct.StrTag = "CCC";    }     // ---- Usage -----------------------     protected void Button1_Click(object sender, EventArgs e)    {        MyStruct Data;        Data.StrTag = "AAA";         SetMyStruct(Data);        // Data.StrTag is still "AAA"         SetMyStruct(ref Data);        // Data.StrTag is now "CCC"    } No surprises here. All value types like ints, floats, datetimes, enums, structs, etc. work the same way. And now on to... Class Types and Ref     // ---- Declaration -----------------------------     public class MyClass    {        public string StrTag;    }     // ---- Functions ----------------------------     void SetMyClass(MyClass myClass)  // pass by 'value'    {        myClass.StrTag = "BBB";    }     void SetMyClass(ref MyClass myClass)   // pass by ref    {        myClass.StrTag = "CCC";    }     // ---- Usage ---------------------------------------     protected void Button2_Click(object sender, EventArgs e)    {        MyClass Data = new MyClass();        Data.StrTag = "AAA";         SetMyClass(Data);          // Data.StrTag is now "BBB"         SetMyClass(ref Data);        // Data.StrTag is now "CCC"    }  No surprises here either. Since Classes are reference types, you do not need the ref keyword to modify an object. What may seem a little strange is that with or without the ref keyword, the results are the same: The compiler knows what to do. So, why would you need to use the ref keyword when passing an object to a function? Because then you can change the reference itself…ie you can make it refer to a completely different object. Inside the function you can do: myClass = new MyClass() and the old object will be garbage collected and the new object will be returned to the caller. That ends the review. Now let's look at passing strings as parameters. The String Type and Ref Strings are reference types. So when you pass a String to a function, you do not need the ref keyword to change the string. Right? Wrong. Wrong, wrong, wrong. When I saw this, I was so surprised that I fell out of my chair. Getting up, I bumped my head on my desk (which really hurt). My bumping the desk caused a large speaker to fall off of a bookshelf and land squarely on my big toe. I was screaming in pain and hopping on one foot when I lost my balance and fell. I struck my head on the side of the desk (once again) and knocked myself out cold. When I woke up, I was in the hospital where due to a database error (thanks Oracle) the doctors had put casts on both my hands. I'm typing this ever so slowly with just my ton..tong ..tongu…tongue. But I digress. Okay, the only true part of that story is that I was a bit surprised. Here is what happens passing a String to a function.     // ---- Functions ----------------------------     void SetMyString(String myString)   // pass by 'value'    {        myString = "BBB";    }     void SetMyString(ref String myString)  // pass by ref    {        myString = "CCC";    }     // ---- Usage ---------------------------------     protected void Button3_Click(object sender, EventArgs e)    {        String MyString = "AAA";         SetMyString(MyString);        // MyString is still "AAA"  What!!!!         SetMyString(ref MyString);        // MyString is now "CCC"    } What the heck. We should not have to use the ref keyword when passing a String because Strings are reference types. Why didn't the string change? What is going on?   I spent hours unssuccessfully researching this anomaly until finally, I had a Eureka moment: This code: String MyString = "AAA"; Is semantically equivalent to this code (note this code doesn't actually compile): String MyString = new String(); MyString = "AAA"; Key Point: In the function, the copy of the reference is pointed to a new object and THAT object is modified. The original reference and what it points to is unchanged. You can simulate this behavior by modifying the class example code to look like this:      void SetMyClass(MyClass myClass)  // call by 'value'    {        //myClass.StrTag = "BBB";        myClass = new MyClass();        myClass.StrTag = "BBB";    } Now when you call the SetMyClass function without using ref, the parameter is unchanged...just like the string example.  I hope someone finds this useful. Steve Wellens

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  • TemplateBinding with Converter - what is wrong?

    - by MartyIX
    I'm creating a game desk. I wanted to specify field size (one field is a square) as a attached property and with this data set value of ViewPort which would draw 2x2 matrix (and tile mode would do the rest of game desk). I'm quite at loss what is wrong because the binding doesn't work. Testing line in XAML for the behaviour I would like to have: <DrawingBrush Viewport="0,0,100,100" ViewportUnits="Absolute" TileMode="None"> The game desk is based on this sample of DrawingPaint: http://msdn.microsoft.com/en-us/library/aa970904.aspx (an image is here) XAML: <Window x:Class="Sokoban.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:Sokoban" Title="Window1" Height="559" Width="419"> <Window.Resources> <local:FieldSizeToRectConverter x:Key="fieldSizeConverter" /> <Style x:Key="GameDesk" TargetType="{x:Type Rectangle}"> <Setter Property="local:GameDeskProperties.FieldSize" Value="50" /> <Setter Property="Fill"> <Setter.Value> <!--<DrawingBrush Viewport="0,0,100,100" ViewportUnits="Absolute" TileMode="None">--> <DrawingBrush Viewport="{TemplateBinding local:GameDeskProperties.FieldSize, Converter={StaticResource fieldSizeConverter}}" ViewportUnits="Absolute" TileMode="None"> <DrawingBrush.Drawing> <DrawingGroup> <GeometryDrawing Brush="CornflowerBlue"> <GeometryDrawing.Geometry> <RectangleGeometry Rect="0,0,100,100" /> </GeometryDrawing.Geometry> </GeometryDrawing> <GeometryDrawing Brush="Azure"> <GeometryDrawing.Geometry> <GeometryGroup> <RectangleGeometry Rect="0,0,50,50" /> <RectangleGeometry Rect="50,50,50,50" /> </GeometryGroup> </GeometryDrawing.Geometry> </GeometryDrawing> </DrawingGroup> </DrawingBrush.Drawing> </DrawingBrush> </Setter.Value> </Setter> </Style> </Window.Resources> <StackPanel> <Rectangle Style="{StaticResource GameDesk}" Width="300" Height="150" /> </StackPanel> </Window> Converter and property definition: using System; using System.Collections.Generic; using System.Text; using System.Windows.Controls; using System.Windows; using System.Diagnostics; using System.Windows.Data; namespace Sokoban { public class GameDeskProperties : Panel { public static readonly DependencyProperty FieldSizeProperty; static GameDeskProperties() { PropertyChangedCallback fieldSizeChanged = new PropertyChangedCallback(OnFieldSizeChanged); PropertyMetadata fieldSizeMetadata = new PropertyMetadata(50, fieldSizeChanged); FieldSizeProperty = DependencyProperty.RegisterAttached("FieldSize", typeof(int), typeof(GameDeskProperties), fieldSizeMetadata); } public static int GetFieldSize(DependencyObject target) { return (int)target.GetValue(FieldSizeProperty); } public static void SetFieldSize(DependencyObject target, int value) { target.SetValue(FieldSizeProperty, value); } static void OnFieldSizeChanged(DependencyObject target, DependencyPropertyChangedEventArgs e) { Debug.WriteLine("FieldSize just changed: " + e.NewValue); } } [ValueConversion(/* sourceType */ typeof(int), /* targetType */ typeof(Rect))] public class FieldSizeToRectConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { Debug.Assert(targetType == typeof(int)); int fieldSize = int.Parse(value.ToString()); return new Rect(0, 0, 2 * fieldSize, 2 * fieldSize); } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { // should not be called in our example throw new NotImplementedException(); } } }

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