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  • Craftsmanship is ALL that Matters

    - by Wayne Molina
    Today, I'm going to talk about a touchy subject: the notion of working in a company that doesn't use the prescribed "best practices" in its software development endeavours.  Over the years I have, using a variety of pseudonyms, asked this question on popular programming forums.  Although I always add in some minor variation of the story to avoid suspicion that it's the same person posting, the crux of the tale remains the same: A Programmer’s Tale A junior software developer has just started a new job at an average company, creating average line-of-business applications for internal use (the most typical scenario programmers find themselves in).  This hypothetical newbie has spent a lot of time reading up on the "theory" of software development, devouring books, blogs and screencasts from well-known and respected software developers in the community in order to broaden his knowledge and "do what the pros do".  He begins his new job, eager to apply what he's learned on a real-world project only to discover that his new teammates doesn't use any of those concepts and techniques.  They hack their way through development, or in a best-case scenario use some homebrew, thrown-together semblance of a framework for their applications that follows not one of the best practices suggested by the “elite” in the software community - things like TDD (TDD as a "best practice" is the only subjective part of this post, but it's included here due to a very large following of respected developers who consider it one), the SOLID principles, well-known and venerable tools, even version control in a worst case and truly nightmarish scenario.  Our protagonist is frustrated that he isn't doing things the "proper" way - a way he's spent personal time digesting and learning about and, more importantly, a way that some of the top developers in the industry advocate - and turns to a forum to ask the advice of his peers. Invariably the answer I, in the guise of the concerned newbie, will receive is that A) I don't know anything and should just shut my mouth and sling code the bad way like everybody else on the team, and B) These "best practices" are fade or a joke, and the only thing that matters is shipping software to your customers. I am here today to say that anyone who says this, or anything like it, is not only full of crap but indicative of exactly the type of “developer” that has helped to give our industry a bad name.  Here is why: One Who Knows Nothing, Understands Nothing On one hand, you have the cognoscenti of the .NET development world.  Guys like James Avery, Jeremy Miller, Ayende Rahien and Rob Conery; all well-respected and noted programmers that are pretty much our version of celebrities.  These guys write blogs, books, and post videos outlining the "correct" way of writing software to make sure it not only works but is maintainable and extensible and a joy to work with.  They tout the virtues of the SOLID principles, or of using TDD/BDD, or using a mature ORM like NHibernate, Subsonic or even Entity Framework. On the other hand, you have Joe Everyman, Lead Software Developer at Initrode Corporation - in our hypothetical story Joe is the junior developer's new boss.  Joe's been with Initrode for 10 years, starting as the company’s very first programmer and over the years building up a little fiefdom of his own until at the present he’s in charge of all Initrode’s software development.  Joe writes code the same way he always has, without bothering to learn much, if anything.  He looked at NHibernate once and found it was "too hard", so he uses a primitive implementation of the TableDataGateway pattern as a wrapper around SqlClient.SqlConnection and SqlClient.SqlCommand instead of an actual ORM (or, in a better case scenario, has created his own ORM); the thought of using LINQ or Entity Framework or really anything other than his own hastily homebrew solution has never occurred to him.  He doesn't understand TDD and considers “testing” to be using the .NET debugger to step through code, or simply loading up an app and entering some values to see if it works.  He doesn't really understand SOLID, and he doesn't care to.  He's worked as a programmer for years, and that's all that counts.  Right?  WRONG. Who would you rather trust?  Someone with years of experience and who writes books, creates well-known software and is akin to a celebrity, or someone with no credibility outside their own minute environment who throws around their clout and company seniority as the "proof" of their ability?  Joe Everyman may have years of experience at Initrode as a programmer, and says to do things "his way" but someone like Jeremy Miller or Ayende Rahien have years of experience at companies just like Initrode, THEY know ten times more than Joe Everyman knows or could ever hope to know, and THEY say to do things "this way". Here's another way of thinking about it: If you wanted to get into politics and needed advice on the best way to do it, would you rather listen to the mayor of Hicktown, USA or Barack Obama?  One is a small-time nobody while the other is very well-known and, as such, would probably have much more accurate and beneficial advice. NOTE: The selection of Barack Obama as an example in no way, shape, or form suggests a political affiliation or political bent to this post or blog, and no political innuendo should be mistakenly read from it; the intent was merely to compare a small-time persona with a well-known persona in a non-software field.  Feel free to replace the name "Barack Obama" with any well-known Congressman, Senator or US President of your choice. DIY Considered Harmful I will say right now that the homebrew development environment is the WORST one for an aspiring programmer, because it relies on nothing outside it's own little box - no useful skill outside of the small pond.  If you are forced to use some half-baked, homebrew ORM created by your Director of Software, you are not learning anything valuable you can take with you in the future; now, if you plan to stay at Initrode for 10 years like Joe Everyman, this is fine and dandy.  However if, like most of us, you want to advance your career outside a very narrow space you will do more harm than good by sticking it out in an environment where you, to be frank, know better than everybody else because you are aware of alternative and, in almost most cases, better tools for the job.  A junior developer who understands why the SOLID principles are good to follow, or why TDD is beneficial, or who knows that it's better to use NHibernate/Subsonic/EF/LINQ/well-known ORM versus some in-house one knows better than a senior developer with 20 years experience who doesn't understand any of that, plain and simple.  Anyone who disagrees is either a liar, or someone who, just like Joe Everyman, Lead Developer, relies on seniority and tenure rather than adapting their knowledge as things evolve. In many cases, the Joe Everymans of the world act this way out of fear - they cannot possibly fathom that a “junior” could know more than them; after all, they’ve spent 10 or more years in the same company, doing the same job, cranking out the same shoddy software.  And here comes a newbie who hasn’t spent 10+ years doing the same things, with a fresh and often radical take on the craft, and Joe Everyman is afraid he might have to put some real effort into his career again instead of just pointing to his 10 years of service at Initrode as “proof” that he’s good, or that he might have to learn something new to improve; in most cases the problem is Joe Everyman, and by extension Initrode itself, has a mentality of just being “good enough”, and mediocrity is the rule of the day. A Thorn Bush is No Place for a Phoenix My advice is that if you work on a team where they don't use the best practices that some of the most famous developers in our field say is the "right" way to do things (and have legions of people who agree), and YOU are aware of these practices and can see why they work, then LEAVE the company.  Find a company where they DO care about quality, and craftsmanship, otherwise you will never be happy.  There is no point in "dumbing" yourself down to the level of your co-workers and slinging code without care to craftsmanship.  In 95% of these situations there will be no point in bringing it to the attention of Joe Everyman because he won't listen; he might even get upset that someone is trying to "upstage" him and fire the newbie, and replace someone with loads of untapped potential with a drone that will just nod affirmatively and grind out the tasks assigned without question. Find a company that has people smart enough to listen to the "best and brightest", and be happy.  Do not, I repeat, DO NOT waste away in a job working for ignorant people.  At the end of the day software development IS a craft, and a level of craftsmanship is REQUIRED for any serious professional.  When you have knowledgeable people with the credibility to back it up saying one thing, and small-time people who are, to put it bluntly, nobodies in the field saying and doing something totally different because they can't comprehend it, leave the nobodies to their own devices to fade into obscurity.  Work for a company that uses REAL software engineering techniques and really cares about craftsmanship.  The biggest issue affecting our career, and the reason software development has never been the respected, white-collar career it was meant to be, is because hacks and charlatans can pass themselves off as professional programmers without following a lick of good advice from programmers much better at the craft than they are.  These modern day snake-oil salesmen entrench themselves in companies by hoodwinking non-technical businesspeople and customers with their shoddy wares, end up in senior/lead/executive positions, and push their lack of knowledge on everybody unfortunate enough to work with/for/under them, crushing any dissent or voices of reason and change under their tyrannical heel and leaving behind a trail of dismayed and, often, unemployed junior developers who were made examples of to keep up the facade and avoid the shadow of doubt being cast upon them. To sum this up another way: If you surround yourself with learned people, you will learn.  Surround yourself with ignorant people who can't, as the saying goes, see the forest through the trees, and you'll learn nothing of any real value.  There is more to software development than just writing code, and the end goal should not be just "shipping software", it should be shipping software that is extensible, maintainable, and above all else software whose creation has broadened your knowledge in some capacity, even if a minor one.  An eager newbie who knows theory and thirsts for knowledge can easily be moulded and taught the advanced topics, but the same can't be said of someone who only cares about the finish line.  This industry needs more people espousing the benefits of software craftsmanship and proper software engineering techniques, and less Joe Everymans who are unwilling to adapt or foster new ways of thinking. Conclusion - I Cast “Protection from Fire” I am fairly certain this post will spark some controversy and might even invite the flames.  Please keep in mind these are opinions and nothing more.  A little healthy rant and subsequent flamewar can be good for the soul once in a while.  To paraphrase The Godfather: It helps to get rid of the bad blood.

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  • OpenFilesView Displays All Open and Locked Files to Help Resolve In-Use Errors

    - by Jason Fitzpatrick
    Windows: You go to move a file and Windows throws up an “In Use” error. OpenFilesView shows you what application or system process is locking up the files you’re trying to move. Sometimes the culprit is obvious; if you go to move your media folder and you’ve got your media player open watching South Park then shutting down the media player is the obvious solution. Other times the culprit is less obvious; sometimes Windows processes and less-than-obvious applications are accessing your files in ways that aren’t apparent. The screenshot below showcases the “In Use” error: This is where OpenFilesView comes into play. Fire up the application to see a list of all active files on your system. The master list is a bit overwhelming (on our test system there were over 1200 open files) but you use the find command to drill down to specific file or folder names. Once you’ve found the locked file you can close the file handle, kill the process, or bring the process to the front (so you can examine the program, if possible, before terminating it). It’s much more efficient than rebooting in an attempt to shake the In-Use error. OpenFilesView is freeware and works on Windows XP through Windows 7. HTG Explains: Do You Really Need to Defrag Your PC? Use Amazon’s Barcode Scanner to Easily Buy Anything from Your Phone How To Migrate Windows 7 to a Solid State Drive

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  • Trying to get MythTV working in Kubuntu 10.10

    - by user4109
    I'm trying to get MythTV working in Kubuntu. Unfortunately I've got the following problem: If I fire up the MythTV Frontend and select "Watch TV" a "Please wait..." label appears and after a while the screen falls back to the home screen. tail -f /var/log/mythtv/mythfrontend.log prints out the following: 2010-10-14 19:22:18.809 MythContext: Connecting to backend server: 127.0.0.1:6543 (try 1 of 1) 2010-10-14 19:22:18.811 Using protocol version 23056 2010-10-14 19:22:22.641 TV: Attempting to change from None to WatchingLiveTV 2010-10-14 19:22:22.641 MythContext: Connecting to backend server: 127.0.0.1:6543 (try 1 of 1) 2010-10-14 19:22:22.642 Using protocol version 23056 2010-10-14 19:22:22.715 Spawning LiveTV Recorder -- begin 2010-10-14 19:22:26.563 Spawning LiveTV Recorder -- end 2010-10-14 19:22:26.565 ProgramInfo(): Updated pathname '':'' -> '1005_20101014192226.mpg' 2010-10-14 19:22:26.569 We have a playbackURL(/var/lib/mythtv/livetv/1005_20101014192226.mpg) & cardtype(MPEG) 2010-10-14 19:22:33.070 RingBuf(/var/lib/mythtv/livetv/1005_20101014192226.mpg): Invalid file (fd -1) when opening '/var/lib/mythtv/livetv/1005_20101014192226.mpg'. 2010-10-14 19:22:33.072 We have a RingBuffer Then there is a whole bunch of those... 2010-10-14 19:22:33.186 RingBuf(/var/lib/mythtv/livetv/1005_20101014192226.mpg) error: Invalid file descriptor in 'safe_read()' ... before it falls back to the main menu. I've got a MSI TV@Anywhere Plus Tuner Card (Philips Semiconductors SAA7131/SAA7133/SAA7135 Video Broadcast Decoder). Any idea what could be the problem?

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  • 1.5 million Windows 7 phone’s sold…

    - by Boonei
    Microsoft announced that it has sold over 1.5 million windows 7 phone devices. Windows 7 is a new generation of OS. Mobile operators/users/device programmers need to adopt the same. Its not going to be a easy transition because it’s not an advanced/next version of win 6.x for mobile. We have heard that development from Microsoft side for Win 6.x devices will not continue after sometime. Don’t know how long will get the support! Everything in it s quite new, like OS, User interface, XBox sync, and also requires mobile phone companies to run the OS on high end chips, meaning atleast 1GHz. So the user segment occupied by phones like HTC Wild Fire are not the ones targeted.   Hey ! There an is a catch with this magic number 1.5 million…. It depicts only the number of units sold to mobile operators and retailers. It’s not the number of actual units held in consumers hands and activated. The number could improve significantly in 2011 where Sprint and Verizon join the party in United States. Atleast dozen phone models are in line up now in the rest of the world running Win 7 OS. One good things that customers can rejoice is that Microsoft will direly push software updates to all its consumers. Operator will not interfere. We can expect strong sales going forward with just this important point where Google’s Android lacks the same. [Img Credit: Microsoft] This article titled,1.5 million Windows 7 phone’s sold…, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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  • Changing the BizTalk message output file name

    - by Bill Osuch
    By default, BizTalk creates the filename of the message dropped to a send port as %MessageID%, which is the unique identifier (GUID) of the message. What if you want to create your own filename? To start, create a simple schema, and a basic orchestration that will receive the message and send it right back out, like this: If you deploy this and wire up the ports, you can drop an xml file into your receive port and have it come out at your send port named something like {7A63CAF8-317B-49D5-871F-9FD57910C3A0}.xml. Now, we'll create a new message with a custom filename. First, create a new orchestration variable called NewFileName, of the type System.String. Next, create a second message using the same schema as the message you're receiving in the Receive shape. Now, drag a Construct Message shape to the orchestration. In the shape's properties, set Messages Constructed to be the new message you just created. Double click the Message Assignment shape (inside the Construct shape...) and paste in the following code: Message_2 = Message_1;   NewFileName = Message_1(FILE.ReceivedFileName); NewFileName = NewFileName.Replace(".xml","_"); NewFileName = NewFileName + "output_" + System.DateTime.Now.Year.ToString() + "-" + System.DateTime.Now.Month.ToString();   Message_2(FILE.ReceivedFileName) = NewFileName; Here we make a copy of the received message, get it's original file name (ReceivedFileName), replace its extension with an underscore, and date-stamp it. Finally, add a Send shape and a Port to the surface, and configure them to send the message you just created. You should wind up with an orchestration like this: Deploy it, and create a new send port. It should be just about identical to the first send port, except this time the file name will be "%SourceFileName%.xml" (without the quotes of course). Fire up the application, drop in a test file, and you should now get both the xml file named with a GUID, and a second file named something along the lines of "MySchemaTestFile_output_2011-6.xml".

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  • Fix Google Reader Lag by Blocking Google Plus Button

    - by Jason Fitzpatrick
    Chrome: Many Google Reader fans have noticed, since the upgrades last month, that the service is unbearably slow. Speed things up by blocking the Google Plus button. Ever since the upgrade from the old Google Reader interface to the new integrated-with-Google-Plus interface, many Google Reader users were reporting a painfully long lag between reading entries in Reader. Previously hitting a keyboard shortcut or arrow button to move you through the new stories was instant with no noticeable lag. After the upgrade a lag of 3-5 seconds per individual story became common (we experienced this annoying lag around the How-To Geek office immediately after the upgrade). One of the theories was that the addition of the Google Plus button to every article was causing memory issues. Geeks Are Sexy tested the theory by blocking this address: plusone.google.com/u/0/_/+1/fastbutton using AdBlock. While people were reporting great success with that move (and you may find it works great too) we didn’t have any luck. What did work for us was installing Chromeblock and, while visiting reader.google.com, clicking on the ChromeBlock toolbar button and blocking Google +1. After that the 3-5 second lag vanished and browsing articles was as snappy as it had been. Hit up the link below to grab a copy of Chromeblock. Amazon’s New Kindle Fire Tablet: the How-To Geek Review HTG Explains: How Hackers Take Over Web Sites with SQL Injection / DDoS Use Your Android Phone to Comparison Shop: 4 Scanner Apps Reviewed

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  • Proper way to remove an active / inactive LVM snapshot

    - by user2622247
    I have created a sample ruby script file for removing extra LVM snapshots from the system. For removing LVM snapshot, we are using lvremove command. This command is working fine and we can remove snapshots from the system. # sudo lvremove /dev/ops/dbbackup lvremove -- do you really want to remove "/dev/ops/dbbackup"? [y/n]: y Sometimes while removing snapshots we are getting following errors. Unable to deactivate open rootfs_12.10_20140812_00-cow (252:8) Failed to resume rootfs_12.10_20140812_00. libdevmapper exiting with 7 device(s) still suspended. The system gets frozen. We cannot fire any command or can not perform any action on it. After restarting the system, it is functioning fine. We can perform all the operations even we can delete that snapshot also. I searched about it I found these threads https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=659762 and https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=674682 Solution from this thread is after getting the error but I have to avoid this type of error. I have a question, Is there any better way removing LVM snapshots? So that we can avoid this type of error. If anyone needs more info feel free to ask me.

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  • How to improve relationships between consultants and staff programmers

    - by Catchops
    I have been a consultant for a small software consulting firm for quite some time now. Our normal business model is not staff augmentation, but such that we find clients who need assistance in building a solution of some kind and then send in a team who can build that solution, work with the existing IT staff, train all involved on supportting that solution, then move on to the next job. We, of course, are still around for any needed ongoing support. We have a great reputation in our area and have been very successful in implementing the solutions that we provide. However, I have noticed a common theme for most of our projects. When we get on-site, there is generally a "stressed" relationship between our team and many of the IT staff currently at the client. I understand completely that there may be some anxiety about our arrival and that defenses can come up when we are around. Many of the folks are understanding and easy to work with, but there are usually some who will not work well with us at all, and who can quickly become a project risk in many ways. We try to go in with open minds and good attitudes, and try NOT to be arrogent or condecending. We generally get deployed when there is a mess to clean up - but we understand that there were reasons decisions were made that got them in the bind they are...so we just try to determine the next step forward and move on. My question is this - I'd like to hear from the IT staff and programmers out there who have had consultants in - what are the things that consultants do that fire up negative feelings and attitudes? What can we do better to make the relationship better, not only in the beginning, but as the project moves forward?

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  • Reflector – The King is Dead. Long Live the King.

    - by Sean Feldman
    There was enough of responses for Red Gate announcement about free version of .NET Reflector. Neither there’s a need to explain how useful the tool is for almost any .NET developer. There were a lot of talks about the price – $35 is it something to make noise about or just accept it and move on. Honestly, I couldn’t make my mind and was sitting on a fence. Today I learned some really exciting news – two (not one), two different initiatives to replace Reflector. A completely free ILSpy from SharpDevelop Commercial later to be stand-alone free decompiler tool from JetBrains These are great news. First – ILSpy is already doing what I need – you can download it and start using. Having experience with a few projects from SharpDevelop I believe it will be a great tool to have. One of immediate things that I found is reflecting obfuscated assemblies. Reflector blows up and closes, where ILSpy takes it gracefully and just shows an exception with no additional popup windows. JetBrains – company I highly respect. This is the case where I would continue paying money for their product and get more productivity. I am heavily relying on R# to do my job, and having a reflecting option would only add oil into fire of convincing others to use the tool. Though what I was excited was the statement JetBrains boldly put out: …it’s going to be released this year, and it’s going to be free of charge. And by saying “free”, we actually mean “free”.

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  • Why Freezing when sending email?

    - by Outlaw Lemur
    So i have a kinect program which when it detects a human, it saves images of them and sends your email a notification email, the thing is that when it sends the email, it freezes and stops running, Why does it do this? Email Notification Code: void SendNotificationEmail() { string email = textBox1.Text; string message = "Someone has been detected in your house!\n Go to www.kinected.webs.com to view your photos now!!!!"; System.Net.Mail.MailMessage emailsend = new System.Net.Mail.MailMessage(); emailsend.To.Add(email); emailsend.Subject = "There is an Intruder In Your Home!"; emailsend.From = new System.Net.Mail.MailAddress("[email protected]"); emailsend.Body = message; System.Net.Mail.SmtpClient smtp = new System.Net.Mail.SmtpClient("smtp.mail.yahoo.com."); smtp.Send(emailsend); } When its supposed to fire: void nui_ColorFrameReady2(object sender, ImageFrameReadyEventArgs e) { // 32-bit per pixel, RGBA image xxx PlanarImage Image = e.ImageFrame.Image; //int deltaFrames = totalFrames - lastFrameWithMotion; //if (totalFrames2 <= stopFrameNumber & deltaFrames > 300) { ++totalFrames2; string bb1 = Convert.ToString(totalFrames2); // string file_name_3 = "C:\\Research\\Kinect\\Proposal\\Depth_Img" + bb1 + ".jpg"; xxx string file_name_4 = "C:\\temp\\Kinect1_Img" + bb1 + ".jpg"; video.Source = BitmapSource.Create( Image.Width, Image.Height, 96, 96, PixelFormats.Bgr32, null, Image.Bits, Image.Width * Image.BytesPerPixel); BitmapSource image4 = BitmapSource.Create( Image.Width, Image.Height, 96, 96, PixelFormats.Bgr32, null, Image.Bits, Image.Width * Image.BytesPerPixel); if (PersonDetected == 1) { if (totalFrames2 % 10 == 0) { image4.Save(file_name_4, Coding4Fun.Kinect.Wpf.ImageFormat.Jpeg); SendNotificationEmail(); PersonDetected = 0; // lastFrameWithMotion = totalFrames; // topFrameNumber += 100; } } } } Thanks for any help!

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  • Camunda BPM 7.0 on WebLogic 12c

    - by JuergenKress
    If we go on tour together with Oracle I think we have to have camunda BPM running on the Oracle WebLogic application server 12c (WLS in short). And one of our enterprise customers asked - so I invested a Sunday and got it running (okay - to be honest - I needed quite some help from our Java EE server guru Christian). In this blog post I give a step by step description how run camunda BPM on WLS. Please note that this is not an official distribution (which would include a sophisticated QA, a comprehensive documentation and a proper distribution) - it was my personal hobby. And I did not fire the whole test suite agains WLS - so there might be some issues. We will do the real productization as soon as we have a customer for it (let us know if this is interesting for you). Necessary steps After installing and starting up WLS (I used the zip distribution of WLS 12c by the way) you have to do: Add a datasource Add shared libraries Add a resource adapter (for the Job Executor using a proper WorkManager from WLS) Add an EAR starting up one process engine Add a WAR file containing the REST API Add other WAR files (e.g. cockpit) and your own process applications Actually that sounds more work to do than it is ;-) So let's get started: Add a datasource Add a datasource via the Administration Console (or any other convenient way on WLS - I should admit that personally I am not the WLS expert). Make sure that you target it on your server - this is not done by default: Read the full article here. For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Camunda,BPM,JavaEE7,WebLogic Community,Oracle,OPN,Jürgen Kress

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  • Can't configure Bluetooth drivers for mac mini 4,1

    - by t0dbld
    upon following the instructions on thread for mac mini leading to me to a thread for a fix for BlueTooth, i follow the instructions (even they are for other Mac's) i get it to fire up and combined with hcitool i managed to connect my apple track pad and keyboard... how ever upon reboot im back to bluetooth telling me there are no drivers nothing works, yet all the files are still there? This is driving me nuts and i caant figure out what i could be doing do you have any ideas what would make this happen ? lsusb results Bus 004 Device 007: ID 05ac:8218 Apple, Inc. Bus 004 Device 006: ID 05ac:820b Apple, Inc. Bus 004 Device 005: ID 05ac:820a Apple, Inc. Bus 004 Device 004: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth) Bus 004 Device 003: ID 05ac:8242 Apple, Inc. IR Receiver [built-in] Bus 004 Device 002: ID 03f0:1c24 Hewlett-Packard Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 054c:031f Sony Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

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  • Organizing Connections with Folders in Oracle SQL Developer

    - by thatjeffsmith
    How many Oracle databases do you work with on a regular basis? I’m guessing the answer for most of you lies between 1 and 500. This post is really geared for those of you who deal with more than just a handful (5) of database connections. Filters are nice when you need to work with a subset of table data, or even a list of tables. So why wouldn’t they be just as useful for organizing your connections? Here’s my complete list of databases: The folders aren’t there by default, you add them as you need them. Now this isn’t an overly large connection list. But when I need to fire up an impromptu demo for a customer, it’s very nice to be able to drill down into JUST those ‘safe’ environments. This actually saves me a few seconds every time I need to connect to one of my databases. So while it’s a very simple feature, it’s one of those things that I recommend EVERYONE take advantage of as it will save them hours of time over the long haul. Easier to find means I get to work a few seconds faster. This also helps me from making mistakes in ‘production’ environments! How to Add a Connection Folder Select a connection you want to organize. Mouse-right-click, and choose ‘Add to folder.’ You can throw it into a new container or an existing one. Lather, rinse, and repeat as necessary. The only trick is remembering to right-click! Special thanks to @dresendi for today’s topic! He asked how to do this and I realized I hadn’t blogged the topic yet

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  • pdflatex reads .eps files saved in OS/X, but not in Ubuntu

    - by David B Borenstein
    Sorry if this is a stupid question; I'm a newbie. I am preparing a manuscript in LaTeX. The journal (Physical Biology, an IOP publication) requires that figures be saved in .eps format, so I am trying to do that. However, I cannot get my LaTeX file to build when I have generated the .eps files on my Ubuntu computer. If I save the images on my Mac, the file build just fine. So far, I have tried saving images in ImageJ, FIJI and Inkscape. The same problem occurs in all three. When using kile, I get the following error: /usr/share/texmf-texlive/tex/latex/oberdiek/epstopdf-base.sty:0: Shell escape feature is not enabled. In TexWorks, the error is different, but still there: Package pdftex.def Error: File `./figures4/figure4a-eps-converted-to.pdf' not found. Now, if I fire up Inkscape, FIJI or ImageJ on OS/X, everything works fine. The Mac also can't build with the Ubuntu-saved images. The images generated on the Ubuntu machine open fine using Document Viewer. I am building the same LaTeX file on both computers, with the exact same results. The header of my LaTeX file is: \documentclass[12pt]{iopart} \usepackage{graphicx} \usepackage{epstopdf} \usepackage{parskip} \usepackage{color} \usepackage{iopams} And then the code for the figure is: \begin{figure} \center{\includegraphics[width=4in] {./figures4/figure4a.eps}} \footnotesize{\caption{ \label{fig:4a} (4a) lorem ipsum dolor sic amet.}} \end{figure} I'd be happy to send an example of both .eps files. Again, sorry if this is a dumb question. I tried everything I could think of before posting here. Thanks, David

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  • Improving the speed of writing code in C#

    - by Robert Harvey
    Laugh if you want, but I used to develop substantial line-of-business applications in VB6, long before the .NET framework came along. Why, when I was your age, we used to walk two miles in the snow, uphill. Both ways... Love it or hate it, VB6 had a REPL-like feel, and a very rapid development cycle. I would like to know how to come closer to that process in C#. In VB6, I could write a function, execute it, debug it and have it fully functional in a few minutes. I am told this is how the Lisp crowd works. It's a very rapid-fire style of programming. In C# I write a function, then I write a unit test for that function (which is OK, I understand the value of that), then I right-click, run test, wait for the project to compile (takes about 10 seconds right now, which would be an eternity for a REPL loop), and get an exception. Honestly, this feels more like my junior college days, when I used to feed punch cards into a hopper and wait for a printout (exaggerating only slightly for effect). Additionally, my tendency nowadays is to make everything public while I'm testing it. Unit testing with private accessors works fine, but you can't trace through the code (unless, of course, I'm doing something wrong) while you're using them. So what I'd like to know is, what adjustments have you made to your development process in C# to streamline it, and make it possible to write and verify your code very rapidly?

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  • Implementing game rules in a tactical battle board game

    - by Setzer22
    I'm trying to create a game similar to what one would find in a typical D&D board game combat. For mor examples you could think of games like Advance Wars, Fire Emblem or Disgaea. I should say that I'm using design by component so far, but I can't find a nice way to fit components into the part I want to ask. I'm struggling right now with the "game rules" logic. That is, the code that displays the menu, allows the player to select units, and command them, then tells the unit game objects what to do given the player input. The best way I could thing of handling this was using a big state machine, so everything that could be done in a "turn" is handled by this state machine, and the update code of this state machine does different things depending on the state. This approach, though, leads to a large amount of code (anything not model-related) to go into a big class. Of course I can subdivide this big class into more classes, but it doesn't feel modular and upgradable enough. I'd like to know of better systems to handle this in order to be able to upgrade the game with new rules without having a monstruous if/else chain (or switch / case, for that matter). So, any ideas? I'd also like to ask that if you recommend me a specific design pattern to also provide some kind of example or further explanation and not stick to "Yeah you should use MVC and it'll work".

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  • jQuery CSS Property Monitoring Plug-in updated

    - by Rick Strahl
    A few weeks back I had talked about the need to watch properties of an object and be able to take action when certain values changed. The need for this arose out of wanting to build generic components that could 'attach' themselves to other objects. One example is a drop shadow - if I add a shadow behavior to an object I want the shadow to be pinned to that object so when that object moves I also want the shadow to move with it, or when the panel is hidden the shadow should hide with it - automatically without having to explicitly hook up monitoring code to the panel. For example, in my shadow plug-in I can now do something like this (where el is the element that has the shadow attached and sh is the shadow): if (!exists) // if shadow was created el.watch("left,top,width,height,display", function() { if (el.is(":visible")) $(this).shadow(opt); // redraw else sh.hide(); }, 100, "_shadowMove"); The code now monitors several properties and if any of them change the provided function is called. So when the target object is moved or hidden or resized the watcher function is called and the shadow can be redrawn or hidden in the case of visibility going away. So if you run any of the following code: $("#box") .shadow() .draggable({ handle: ".blockheader" }); // drag around the box - shadow should follow // hide the box - shadow should disappear with box setTimeout(function() { $("#box").hide(); }, 4000); // show the box - shadow should come back too setTimeout(function() { $("#box").show(); }, 8000); This can be very handy functionality when you're dealing with objects or operations that you need to track generically and there are no native events for them. For example, with a generic shadow object that attaches itself to any another element there's no way that I know of to track whether the object has been moved or hidden either via some UI operation (like dragging) or via code. While some UI operations like jQuery.ui.draggable would allow events to fire when the mouse is moved nothing of the sort exists if you modify locations in code. Even tracking the object in drag mode this is hardly generic behavior - a generic shadow implementation can't know when dragging is hooked up. So the watcher provides an alternative that basically gives an Observer like pattern that notifies you when something you're interested in changes. In the watcher hookup code (in the shadow() plugin) above  a check is made if the object is visible and if it is the shadow is redrawn. Otherwise the shadow is hidden. The first parameter is a list of CSS properties to be monitored followed by the function that is called. The function called receives this as the element that's been changed and receives two parameters: The array of watched objects with their current values, plus an index to the object that caused the change function to fire. How does it work When I wrote it about this last time I started out with a simple timer that would poll for changes at a fixed interval with setInterval(). A few folks commented that there are is a DOM API - DOMAttrmodified in Mozilla and propertychange in IE that allow notification whenever any property changes which is much more efficient and smooth than the setInterval approach I used previously. On browser that support these events (FireFox and IE basically - WebKit has the DOMAttrModified event but it doesn't appear to work) the shadow effect is instant - no 'drag behind' of the shadow. Running on a browser that doesn't support still uses setInterval() and the shadow movement is slightly delayed which looks sloppy. There are a few additional changes to this code - it also supports monitoring multiple CSS properties now so a single object can monitor a host of CSS properties rather than one object per property which is easier to work with. For display purposes position, bounds and visibility will be common properties that are to be watched. Here's what the new version looks like: $.fn.watch = function (props, func, interval, id) { /// <summary> /// Allows you to monitor changes in a specific /// CSS property of an element by polling the value. /// when the value changes a function is called. /// The function called is called in the context /// of the selected element (ie. this) /// </summary> /// <param name="prop" type="String">CSS Properties to watch sep. by commas</param> /// <param name="func" type="Function"> /// Function called when the value has changed. /// </param> /// <param name="interval" type="Number"> /// Optional interval for browsers that don't support DOMAttrModified or propertychange events. /// Determines the interval used for setInterval calls. /// </param> /// <param name="id" type="String">A unique ID that identifies this watch instance on this element</param> /// <returns type="jQuery" /> if (!interval) interval = 200; if (!id) id = "_watcher"; return this.each(function () { var _t = this; var el$ = $(this); var fnc = function () { __watcher.call(_t, id) }; var itId = null; var data = { id: id, props: props.split(","), func: func, vals: [props.split(",").length], fnc: fnc, origProps: props, interval: interval }; $.each(data.props, function (i) { data.vals[i] = el$.css(data.props[i]); }); el$.data(id, data); hookChange(el$, id, data.fnc); }); function hookChange(el$, id, fnc) { el$.each(function () { var el = $(this); if (typeof (el.get(0).onpropertychange) == "object") el.bind("propertychange." + id, fnc); else if ($.browser.mozilla) el.bind("DOMAttrModified." + id, fnc); else itId = setInterval(fnc, interval); }); } function __watcher(id) { var el$ = $(this); var w = el$.data(id); if (!w) return; var _t = this; if (!w.func) return; // must unbind or else unwanted recursion may occur el$.unwatch(id); var changed = false; var i = 0; for (i; i < w.props.length; i++) { var newVal = el$.css(w.props[i]); if (w.vals[i] != newVal) { w.vals[i] = newVal; changed = true; break; } } if (changed) w.func.call(_t, w, i); // rebind event hookChange(el$, id, w.fnc); } } $.fn.unwatch = function (id) { this.each(function () { var el = $(this); var fnc = el.data(id).fnc; try { if (typeof (this.onpropertychange) == "object") el.unbind("propertychange." + id, fnc); else if ($.browser.mozilla) el.unbind("DOMAttrModified." + id, fnc); else clearInterval(id); } // ignore if element was already unbound catch (e) { } }); return this; } There are basically two jQuery functions - watch and unwatch. jQuery.fn.watch(props,func,interval,id) Starts watching an element for changes in the properties specified. props The CSS properties that are to be watched for changes. If any of the specified properties changes the function specified in the second parameter is fired. func (watchData,index) The function fired in response to a changed property. Receives this as the element changed and object that represents the watched properties and their respective values. The first parameter is passed in this structure:    { id: itId, props: [], func: func, vals: [] }; A second parameter is the index of the changed property so data.props[i] or data.vals[i] gets the property value that has changed. interval The interval for setInterval() for those browsers that don't support property watching in the DOM. In milliseconds. id An optional id that identifies this watcher. Required only if multiple watchers might be hooked up to the same element. The default is _watcher if not specified. jQuery.fn.unwatch(id) Unhooks watching of the element by disconnecting the event handlers. id Optional watcher id that was specified in the call to watch. This value can be omitted to use the default value of _watcher. You can also grab the latest version of the  code for this plug-in as well as the shadow in the full library at: http://www.west-wind.com:8080/svn/jquery/trunk/jQueryControls/Resources/ww.jquery.js watcher has no other dependencies although it lives in this larger library. The shadow plug-in depends on watcher.© Rick Strahl, West Wind Technologies, 2005-2011

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  • How can I use iteration to lead targets?

    - by e100
    In my 2D game, I have stationary AI turrets firing constant speed bullets at moving targets. So far I have used a quadratic solver technique to calculate where the turret should aim in advance of the target, which works well (see Algorithm to shoot at a target in a 3d game, Predicting enemy position in order to have an object lead its target). But it occurs to me that an iterative technique might be more realistic (e.g. it should fire even when there is no exact solution), efficient and tunable - for example one could change the number of iterations to improve accuracy. I thought I could calculate the current range and thus an initial (inaccurate) bullet flight time to target, then work out where the target would actually be by that time, then recalculate a more accurate range, then recalculate flight time, etc etc. I think I am missing something obvious to do with the time term, but my aimpoint calculation does not currently converge after the significant initial correction in the first iteration: import math def aimpoint(iters, target_x, target_y, target_vel_x, target_vel_y, bullet_speed): aimpoint_x = target_x aimpoint_y = target_y range = math.sqrt(aimpoint_x**2 + aimpoint_y**2) time_to_target = range / bullet_speed time_delta = time_to_target n = 0 while n <= iters: print "iteration:", n, "target:", "(", aimpoint_x, aimpoint_y, ")", "time_delta:", time_delta aimpoint_x += target_vel_x * time_delta aimpoint_y += target_vel_y * time_delta range = math.sqrt(aimpoint_x**2 + aimpoint_y**2) new_time_to_target = range / bullet_speed time_delta = new_time_to_target - time_to_target n += 1 aimpoint(iters=5, target_x=0, target_y=100, target_vel_x=1, target_vel_y=0, bullet_speed=100)

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  • IBus client for GNU Emacs: Installed, but how do I start it?

    - by fred.bear
    Having recently moved to Linux/Ubuntu, I'm looking for a good editor, and GNU Emacs seems to fit the bill. One thing I want from a text editor is the ability to handle Unicode Input Method Editors in a "normal way", across the board. For Ubuntu, the "normal way" is via IBus. However, emacs does not support IBus "off the shelf". I found a launchpad project: IBus client for GNU Emacs: ibus-el. I've installed ibus-el and set it up as per the Customize section of this emacswiki IBusMode page. I included the suggested "toggle" keybinding: ;; Use s-SPC to toggle input status It seems to have installed okay, but I have no idea how to invoke IBus and switch IMEs. s-SPC doesn't fire up the IBus language panel... I'm stuck :( ...so close, yet so far.... Here are the startup *messages* Loading 00debian-vars... No /etc/mailname. Reverting to default... Loading 00debian-vars...done Loading /etc/emacs/site-start.d/50autoconf.el (source)...done Loading /etc/emacs/site-start.d/50dictionaries-common.el (source)... Loading debian-ispell... Loading /var/cache/dictionaries-common/emacsen-ispell-default.el (source)...done Loading debian-ispell...done Loading /var/cache/dictionaries-common/emacsen-ispell-dicts.el (source)...done Loading /etc/emacs/site-start.d/50dictionaries-common.el (source)...done Loading /etc/emacs/site-start.d/50festival.el (source)...done Loading /etc/emacs/site-start.d/50gtk-doc-tools.el (source)...done Loading /etc/emacs/site-start.d/50ibus-el.el (source)...done IBus: Xlib.protocol.request.QueryExtension IBus: Agent successfully started for display ":0.0"

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  • excel vba to CRUD drupal nodes

    - by Kirk Hings
    We need to periodically migrate Excel reports data into Drupal nodes. We looked at replicating some Excel functionality in Drupal with slickgrid, but it wasn't up to snuff. The Excel reports people don't want to double-enter their data, but their data is important to be in this Drupal site. They have hundreds of Excel reports, and update a row in each weekly. We want a button at the row end to fire a VBA macro that submits the data to Drupal, where a new node is created from the info submitted. (Yes, we are experienced with both Drupal and VBA; all users and the site are behind our firewall.) We need the new node's nid or URL returned so we can then create a link in Excel directly to that node Site is D6, using Services 3.x module. I tried the REST server module, but we can't get it to retrieve data without session authentication on, which we can't do from Excel. (unless you can?) I also noticed the 'data' it was returning via browser url was 14 or 20 nodes' info, not the one nid requested (Example: http://mysite.com/services/rest/report/node/30161) When I attempt to create a simple node like this from VBA: Dim MyURL as String MyURL = "http://mysite.com/services/rest/report/node?node[type]=test&node[title]=testing123&node[field_test_one][0][value]=123" Set objHTTP = CreateObject("MSXML2.ServerXMLHTTP") With objHTTP .Open "POST", MyURL, False .setRequestHeader "Content-Type", "application/x-www-form-urlencoded" .send (MyURL) End With I get HTTP Status: Unauthorized: Access denied for user 0 "anonymous" and HTTP Response: null Everything I search for has examples in php or java, nothing in VBA. Also tried switching to using an XMLRPC server but that's even more confusing. We would like json (used application/json, set formatter accordingly in REST server settings), but will use anything that works. Ideas? Thanks in advance!

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  • DIY Homemade Hybrid Rocket Engine [Video]

    - by Jason Fitzpatrick
    Remember the guy with the cool DIY astronaut ice cream build? He’s back with a mini hybrid rocket engine that runs off oxygen and acrylic. I built a small rocket engine for demonstration purposes. The engine is built from a 2″ diameter acrylic rod through which I drilled a 0.5″ hole. The oxygen at 80 psi or less is passed through the hole and then is forced through a convergent-divergent nozzle at the tail end. The nozzle’s throat is about 0.25″ and expands to 0.625″. I lit the engine by inserting a burning cotton swab (with wooden stick) while a small amount of oxygen was flowing. The acrylic catches fire very easily in a pure oxygen environment. The engine can be throttled and shut off completely, which is a major benefit to hybrid engine designs. Solid-fuel rockets cannot be throttled or shut off, which makes them difficult to control. [via Make] HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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  • GitHub: Are there external tools for managing issues list vs. project backlog

    - by DXM
    Recently I posted one of my the projects1 on GitHub and as I was exploring capabilities of the site, I noticed they have a rather decent issue tracking section. I want to use that section as a) other people can report bugs if they'd like and b) other people can see which bugs I'm aware of. However, as others have noted, issues list cannot be prioritized in order to create a project backlog. For now my backlog has been a text file, but I'd like to be able to have it integrated so the same information isn't maintained in different places. Having a fully ordered list, which is something we also practice at work, has been very useful as I can open one file, start with line 1 and fire off 2 or 3 items in one sitting without having to go back to a full issues/stories bucket. GitHub doesn't offer this. What GitHub does offer is a very nice and clean API so issues can easily be exported into anything else. I've searched to see if there are other websites (like Trello) that integrate with GitHub issues, but did not find anything. Does anyone know of such a product, service or offline tool? Those that use GitHub, what is your experience in managing backlog? I kinda hate the idea of manually managing two disconnected lists like some people seem to be doing with Wiki project pages. 1 - are shameless plugs allowed no this site? Searched but didn't find a definite answer. If it's bad practice, STOP and don't read further As a developer I got sick and tired of navigating to same set of folders 30 times a day, so I wrote a little, auto-collapsible utility that gets stuck to the desktop and allows easy access to the folders you constantly use.

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  • The Middle of Every Project

    - by andrew.sparks
    I read a quote somewhere “The middle of every successful project looks like a mess.” or something to that effect. I suppose the projects where the beginning, middle and end are a mess are the ones you need to watch out for. Right now we are in ramp up of the maintenance/support teams at a big project in the Nordics. We are facing a year of mixed mode operations, where we have production operations and the phased rollout to new locations in parallel. The support team supports, and the deployment team deploys. As usual the assumption right up to about a month or so before initial go-live was that the deployment team would carry the support. Not! Consequently we had a last minute scramble over the Christmas/New Year to fire up a support/maintenance team. While it is a bit messy and not perfect – the quality of the mess (I mean scramble) is not so bad. Weekly operational review with the operational delivery managers, written issue lists and assigned actions, candid discussions getting the problems on the table and documented, issues getting solved and moved off the table. So while the middle of a project might look like a mess (even the start) it is methodical use of project management tools of checklists and scheduled communication points that are helping us navigate out of the mess and bring it all under control.

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  • An unexpected pleasure from Windows 8

    - by eddraper
    This post is certainly on the more nuanced side of all the goodness that is Windows 8, but it’s about something that’s really changed my PC usage experience for the better. Besides being a geek and the enjoying all the techno-thrills and chills that go along with sitting in front of a keyboard all day, I really love the forest.  Trees have always been special to me.  The feeling of being in the forest with all the sounds and ambiance, the broken light, the fragrance of the air… it’s paradise to me. As I can’t get there often, due to work, and quite often the heat here in Texas, I’ve found something that can at least partially fill the gap…  When you install Windows 8, you’ll have an app called “Naturespace” from http://www.naturespace.com/ .  It boasts a number of predefined loops in what they call “holographic audio.”  They’re essentially high-tech 3D sound fields recorded in natural environments. After checking them out, I really liked the sound of the “Daybreak” selection: A great benefit is that you don’t have to be in Metro/Modern/Windows App Store mode, in order to keep the sound playing.  To start the day, I click on Daybreak, start it, then go back to the desktop and fire up VS, Chrome, etc. As I work and play, I’m surrounded by this delightful background ambiance which relaxes me and puts my mind at ease. Give it a try.  I think you’ll like it.  And no, you don’t need ear buds or headphones to get the benefit.

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  • Detecting Units on a Grid

    - by hammythepig
    I am making a little turn based strategy game in pygame, that uses a grid system as the main map to hold all the characters and the map layout. (Similar to Fire Emblem, or Advance Wars) I am trying to determine a way to quickly and efficiently (i.e. without too much of a slow down) check if there are any characters within a given range of the currently selected character. So to illustrate: O = currently selected character X = squares within range Range of 1: X X O X X Range of 2: X X X X X X O X X X X X X Range of 3: X X X X X X X X X X X X O X X X X X X X X X X X X Now I have to tell the user who is in range, and I have to let the user choose who to attack if there are multiple enemies in range. If I have a 5x5 grid, filled with " " for empty and numbers for the characters: [ ][ ][ ][ ][4] [ ][1][ ][ ][ ] [ ][ ][ ][ ][ ] [ ][ ][2][3][ ] [ ][ ][ ][ ][ ] Depending on which character the user selects, I would like to show the user which other characters are in range. So if they all had a range of 3: 1 can hit 2 2 can hit 1 or 3 3 can hit 2 4 cannot hit anyone. So, How do I quickly and/or efficiently run though my grid and tell the user where the enemies are? PS- As a bonus, if someone could give an answer that could also work for a minimum distance type range, I would give them a pat on the back and a high five, should they ever travel to Canada and we ever meet in life. For example: Range of 3 to 5: (- is out of range) X X X X X X X X X X X X - X X X X X X - - - X X X X X X - - O - - X X X X X X - - - X X X X X X - X X X X X X X X X X X X

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