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• How to get started in coding for JBoss

  - by Mister IT Guru

  I have an idea on how to revamp our internal application, after having accessed the needs of the users, addressing thier current issues, and the like. But I am not a coder. My last application I wrote was in college, in C, (java wasn't invented-ish!) and it was a booking system, with the option to add on other modules, blah blah. I got an A, but I became a system administrator instead, more intrested in designing and maintainend networks and infrastructure, but with the advent of virtualisation, and linux management tools such as puppet I can now manage infrastructure in my sleep! Now I want to write code - to put on my infastructure, and I want to build .... a booking system! This is just to get experience, but I am at a loss as to where to start. Setting up the environment, will take me about a day. Writing the spec, even how I want it to work, I already know, but as for actually coding in a decent manner, I can only guess. If anyone can recommend a book, website, blog, twitter person to follow, or just advice on how to build a kick butt basic jboss app, then please, "I AM READY TO LEARN" :)

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• The year ahead, 2011.

  - by andrewstopford

  When I look back at last years look at 2010 my blogging rate has not changed much (I suspect this is largely down to using Twitter a lot) but my interests this year have developed a lot further. My view on 2010 would be that Microsoft would commit more to OSS, while I wanted to see more hires from that audience and more projects on Outercurve foundation instead there has been support for JQuery and Gems (aka NuGet). I would love to see more from Microsoft on the OSS front in 2011, Outercurve could become like the Apache foundation with enough support. Staying on the Microsoft front I predict that 2011 will bring the following. C# 5.0 will go RTM (still no MOP though) The next release of VS will go alpha or early beta MS MVC 4.0 (I think by Mix time) and maybe this release will get a command line. I also suspect that Microsoft will want to target the tablet market with WP7 in 2011 (Mix 2011 maybe...). I also predict the following Java will fork with Apache\Google. Oracle will then take them to court and the whole thing will boil right through 2011 (Java have had enough court cases, come on guys). Java and the JVM will sadly not move forward at all in 2011. Android will cause Apple a serious headache, both the smartphone and tablet market will see figures cut from Apple share. By the end of 2011 the current 70% apple market share will be 40-50%. As the features, performance and price of Android devices gets ever better Apple will be left out in the open. Lastly after 7 years I intend to move this blog away from weblogs. In 2011 I will be exploring Java, Ruby\Rails and Android and such subjects don't make sense to talk about it here. See you in 2011.

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• Get tortoisesvn to give me filenames with build number in the filename

  - by EricJLN

  I am on a Windows 7 box, and I have tortoisesvn on my machine. After getting a little familiar with svn and tortoisesvn on a code repository, I set up a local repository to manage revisions of some word and powerpoint documents. I want to figure out some scripted way to output a set of files with the build/revision number embedded in the filename. I will then email the files to some business people to review. For example, say I have a group of files in my working directory: PresentA.pptx PresentA-notes.docx PresentB.pptx and TortoiseSVN repo browser tells me that I am currently at revision 21 for PresentA.pptx and PresentA-notes.docx but at revision 25 for PresentB.pptx, I would like some way to get 3 files with the following names: PresentA-r21.pptx PresentA-notes-r21.docx PresentB-r25.pptx Alternatively, if revision 25 is the current value for the repository, having all the names appended with -r25 would work, too.

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• Practical tips when transitioning to xmonad?

  - by meder

  I like the idea and concept of xmonad, however I still keep going back to gnome after an hour or so. This feels like when I first tried to learn vim, but I've gotten past the learning curve point and can't live without vim nowadays. I'm sure the time will come for xmonad too, but I was wondering if current xmonad users can provide transitional tips? FYI, I'm on dual monitors ( 19 inch and 17 inch ). Example of an issue I'm having while in this "transitional" stage: How do you manage keeping the browser and other programs that are most commonly used in full screen mode, since by default I think it opens up in a small tile that takes up a portion of the screen? Do you just shortcut it to make it open full screen, or do you actually not maximize it? Or are there advanced methods through preferences in the conf file, making certain programs take up X space?

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• Upstart: accept user input to switch xorg.conf

  - by Utaal

  Hi all! I'm trying to get a startup script requiring user input running before gdm starts (the script should allow me to choose from a list of xorg.conf's the one I'd like to use for the current session). Already tried creating a pregdm.conf in /etc/init, containing: start on filesystem stop on runlevels [06] # ... console output script # script that uses read to gather user input and replaces xorg.conf with the selected one end script and changing start on in /etc/init/gdm.conf to: start on (filesystem and started dbus and started pregdm and (drm-device-added card0 PRIMARY_DEVICE_FOR_DISPLAY=1 or stopped udevtrigger)) Echos are displayed in console but I can't make it wait for user input: gdm is started straight away. Any pointers? Thanks a lot

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• Is there a real code-free webpage design tool ?

  - by Sefler

  Recently I was doing web design. I found that the current web design tool (like Expression Web, Dreamweaver) is terribly coupled with code. Though I managed to use HTML, CSS and many others, I found those tool not free enough when came to design. What I want is a totaly code-free design tool with which I can use to draw the layout, paste pictures, add texts and so on. It doesn't need to have functionality to covert the design into code because I can do it myself. That is to say, I need the software to create a blueprint for me. I'm currently using Photoshop to do this. However it is too stupid in displying the layout (It can't show the width and many other attributes, I had to draw them by myself). Can you find one for me? Thanks in advance.

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• Installing latest version of R-base

  - by Student

  I have been unsuccessfully trying to install the latest version (2.15.2) of r-base. Apparently, R package "Rcpp" would not install for R version 2.14.1 - the version that installs for me. I am not sure what/how/where to change my installation attempts which appear below. Please note that I am using ubuntu-12.04.1-server-i386. (1) ------------ The current installed version is R version 2.14.1 (2011-12-22) sudo apt-get install r-base Reading package lists... Done Building dependency tree Reading state information... Done r-base is already the newest version. (2) ------------ Including version information doesn't help: sudo apt-get install r-base=2.15.1-5ubuntu1 Reading package lists... Done Building dependency tree Reading state information... Done E: Version '2.15.1-5ubuntu1' for 'r-base' was not found (3) ------------- Changes based on CRAN Ubuntu instructions http://cran.r-project.org/bin/linux/ubuntu/README 3.1: Added to /etc/apt/sources.list deb http://lib.stat.cmu.edu/R/CRAN/bin/linux/ubuntu quantal/ 3.2: sudo apt-get update 3.3: sudo apt-get install r-base Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: r-base : Depends: r-base-core (= 2.15.2-1quantal2) but it is not going to be installed Depends: r-recommended (= 2.15.2-1quantal2) but it is not going to be installed Recommends: r-base-html but it is not going to be installed E: Unable to correct problems, you have held broken packages.

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• How do I securely share / allow access to a drive?

  - by sleske

  To simplify backing up a laptop (Windows Vista), I'm planning on sharing its C: drive (with password protection) and using that to back it up from another computer. What are the security implications of this? If I share C: with a reasonable password, how big is the risk of compromise if the system is e.g. inadvertently used on a public WLAN or similar? Background: I'm planning to use [Areca Backup][1] to back up two systems (Windows XP and Vista). My current plan is to install Areca on the XP box, and share the Vista system's C: as a shared folder, so the XP system can read it. Then I can set up the drive as a network drive and have Areca read it like a local drive. Of course, if you can think of a more elegant way of doing this, I'm open to suggestions.

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• Horde on Debian: packages or upstream?

  - by fhd

  I'm currently using the Horde projects IMP, DIMP, MIMP, Ingo, Kronolith, Mnemo, Nag, Turba and Sork. I ignored the (rather outdated) Debian packages and installed the upstream versions. A few years later, my Horde installation is a bit outdated and I consider updating each project and each version individually a pain. The Debian stable packages are as outdated as ever, but squeeze will deliver reasonably current versions, so I'm considering switching to the Debian packages as soon as squeeze is released. What would you recommend for software packages like Horde? Using the upstream versions and manually updating or using the distribution's packages?

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• How do I change the .bash_history file location?

  - by Brian Graham

  I'm running CentOS 6.x and want to move the .bash_history to a different location. The home directories of my users are (because I run a VPS) in /var/www/vhost/<domain>.<tld> which is FTP accessible (and it should be). Because of this, I have changed the AuthorizedKeysFile for SSH connections out of the normal ~/.ssh/authorized_keys since FTP connections would easily be able to locate them. At the same time I want to move the .bash_history file to /home/%u/.bash_history where %u is the current user.

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• Software architecture for two similar classes which require different input parameters for the same method

  - by I Like to Code

  I am writing code to simulate a supply chain. The supply chain can be simulated in either an intermediate stocking or a cross-docking configuration. So, I wrote two simulator objects IstockSimulator and XdockSimulator. Since the two objects share certain behaviors (e.g. making shipments, demand arriving), I wrote an abstract simulator object AbstractSimulator which is a parent class of the two simulator objects. The abstract simulator object has a method runSimulation() which takes an input parameter of class SimulationParameters. Up till now, the simulation parameters only contains fields that are common to both simulator objects, such as randomSeed, simulationStartPeriod and simulationEndPeriod. However, I now want to include fields that are specific to the type of simulation that is being run, i.e. an IstockSimulationParameters class for an intermediate stocking simulation, and a XdockSimulationParameters class for a cross-docking simulation. My current idea is take the method runSimulation() out of the AbstractSimulator class, but to put a runSimulation(IstockSimulationParameters) method in the IstockSimulator class, and a runSimulation(XdockSimulationParameters) method in the IstockSimulator class. I am worried however, that this approach will lead to code duplication. What should I do?

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• How to set Laptop Brightness in Gnome and /proc on Thinkpad W510?

  - by hakre

  I can set the brightness of my laptop screen already via /proc. I can read and change the value. Now I've set the value to 33 and then I went into gnome power management and enabled the option that it should reduce the backlight brightness being on battery. That works, the screen gets darker. If I now read out the current setting from /proc it still says it's 33. So I assume that there is another node in /proc to be used to control the brightness. The node I use so far is: /proc/acpi/video/VID/LCD0/brightness I'm using the nouveau driver. With the nvida driver the brightness can not be controlled.

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• Recommendations for stable, reliable flash drives

  - by Josh Kelley

  We're looking to purchase some flash drives for use in some embedded devices. Most of our requirements aren't too different the generic "good, fast" flash drive: reliability is very important, speed is good, and so that the drive will fit, the case shouldn't be too large (so no OCZ Throttles). Consistency is also a major priority; we'd like to be able to buy more or less the same product a year or two from now without having to worry about the manufacturer swapping drive components with less reliable or slower parts. (We've been burned already by our previous manufacturer doing this.) Any recommendations, especially regarding consistency? I can read Ars Technica to get an overview of current models, but what are consistently good models?

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• XNA 2D Spritesheet drawing rendering problem

  - by user24092

  I'm making a tile-based game, using one spritesheet containing all tile graphics. Each tile has a size of 32x32 pixels. The main problem is: when I draw the tile to the screen, if the tile position x and y are not rounded or if scale is activated in spriteBatch.Draw() method (scale != 1.0f), I get some lines of adjacent tiles on the spritesheet into the current tile drawed. I already tried setting SamplerState to PointClamp, removing AntiAlias, but still doesn't work. Here I'll show images of some tests that I made, with a test sprite sheet that I've created (I made a 9x9 spritesheet, with each sprite of size 32x32 containing a unique solid color). Tests: http://img6.imageshack.us/img6/5946/testsqj.png SpriteSheet used: http://imageshack.us/a/img821/1341/tilesm.png Already tried to remove anti-alias, set PointClamp as sampler state, but still getting this issue, XNA keeps drawing part of the adjacent pixels of the texture on the screen. What I want is to get the correct area of the tilesheet texture (as seen in the first test, that gets just the yellow pixels). My question is: Is there any way that I can fix this, WITHOUT adding tile spacing or any other modification involving the tilesheet? Maybe disabling a texture filtering that is done by XNA, or something like that.

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• How can I prevent users from installing software?

  - by Cypher

  Our organization is a bit different than most. During certain times of the year, we grow to thousands of employees, and during off-times, less than a hundred. Over the course of a few years, many thousands of people have come and gone in our offices, and left their legacy behind in the form of all sorts of unwanted, unapproved, (and sometimes unlicensed) software installs on our desktops. We are currently installing redundant domain controllers and upgrading current servers, all running Windows Server 2008 Enterprise, and will eventually be able to run a pure 2008 DC network. With that in mind, what are our options in being able to lock down users, such that they cannot install unauthorized software on systems without the assistance (or authorization) of the IT group? We need to support approximately 400 desktops, so automation is key. I've taken note of the Software Restrictions we can implement via Group Policy, but that implies that we already know what users will be installing and attempting to run... not quite so elegant. Any ideas?

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• Any experience with SATA SAS Interposer Cards?

  - by korkman

  Driven by the current price difference between SATA and SAS disks on one side and the potentially bad behaviour of SATA disks in bigger storage arrays on the other side, I have found so-called SATA-to-SAS interposer cards. Advertised as "seamlessly adding SAS capabilities to existing SATA disk drives", I wonder if anyone here has had some experience with these or similar products. The major benefits I can identify are the increased cable voltage (if all drives are SAS connected), the ability to power-cycle the drive and multipath (if desired). Obviously the SATA drive will still have to be RAID edition. The question is: Do these cards indeed increase the overall reliability of a storage system, or will failing SATA disks cause trouble nevertheless? Edit: I'm not asking for hypothetical answers, only actual experience please. I'm well aware that the typical 10k SAS drive is more reliable (and better performing) than 7200 SATA drives. But how does a nearline SAS, which is phyiscally the same disk as its SATA counterpart, compare to the SATA version with interposer?

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• How to Effectively Create Bullet Patterns

  - by SoulBeaver

  I'm currently creating a top-down shooter like Touhou. The most important factor of the game is that there are many diverse patterns and ways at which bullets are generated and shot at the player, see this video: http://www.youtube.com/watch?v=4Nb5Ohbt1Sg#start=0:60;end=9:53; At the moment, I'm using a class "Pattern" which has a series of steps on moving and shooting. However, I feel this method is quite laborous as I have to create a new Pattern for each attack and perhaps new Bullet classes that will implement a certain behavior. This question received a comment suggesting I should look into BulletML for easy creation and storage of bullets with a specific pattern. It looks decent, but it led me to wonder, what other solutions do you have that I should take into consideration? Update My current design is as follows: An example of an implemented pattern: My GigasPattern first executes a teleport which moves Alice to a certain point (X, Y) on the screen. After this is completed, the pattern starts using the Mover to move the sprite around (whereas teleporting has separate effects and animation). These are of no concern, really, as they are quite simple. The Shooter also creates various Attacks, which are classes again that the Shooter can use to create various patterns of bullets, much like the one in the question I posted. Once the Mover has reached it's destination, both it and the shooter stop and return to an inactive state. The pattern completes, is removed by the AI and a new one gets chosen.

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• Social Media APIs and Their C# Counterparts

  Whether it's talking about current events or sharing photos of a family vacation, the world is now addicted to social networks. Businesses recognize this, and these days every business wants social media addressed in their applications. Facebook, Twitter, and other sites provide powerful APIs you can use to harness the power of social networking in your own applications. However, most of these APIs tend to return data formatted in any number of syndication formats that can be quite painful to work with. Luckily, there are many free .NET based libraries that make interacting with these APIs a breeze. Over the next several weeks, I'll be posting some information and examples specific to some of these libraries. Here are a few of them now for your consumption... TweetSharp Twitter exposes its API in the form of three different APIs, two REST APIs and one Streaming API. These APIs can be queried by making HTTP GET/POST requests to a specific URL with some required parameters. Unfortunately, ...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Google Analytics Social Tracking implementation. Is Google's example correct?

  - by s_a

  The current Google Analytics help page on Social tracking (developers.google.com/analytics/devguides/collection/gajs/gaTrackingSocial?hl=es-419) links to this page with an example of the implementation: http://analytics-api-samples.googlecode.com/svn/trunk/src/tracking/javascript/v5/social/facebook_js_async.html I've followed the example carefully yet social interactions are not registered. This is the webpage with the non-working setup: http://bit.ly/1dA00dY (obscured domain as per Google's Webmaster Central recommendations for their product forums) This is the structure of the page: In the : ga async code copied from the analytics' page a script tag linking to stored in the same domain. the twitter js loading tag In the the fb-root div the facebook async loading js including the _ga.trackFacebook(); call the social buttons afterwards, like so: (with the proper URL) Tweet (with the proper handle) That's it. As far as I can tell, I have implemented it exactly like in the example, but likes and twitts aren't registered. I have also altered the ga_social_tracking.js to register the social interactions as events, adding the code below. It doesn't work either. What could be wrong? Thanks! Code added to ga_social_tracking.js var url = document.URL; var category = 'Social Media'; /* Facebook */ FB.Event.subscribe('edge.create', function(href, widget) { _gaq.push(['_trackEvent', category, 'Facebook', url]); }); /* Twitter */ twttr.events.bind('tweet', function(event) { _gaq.push(['_trackEvent', category, 'Twitter', url]); });

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• What is the value to checking in broken unit tests?

  - by Adam W.

  While there are ways of keeping unit tests from being executed, what is the value of checking in broken unit tests? I will use a simple example. Case sensitivity. The current code is Case Sensitive. A valid input into the method is "Cat" and it would return an enum of Animal.Cat. However, the desired functionality of the method should not be case sensitive. So if the method described was passed "cat" it could possibly return something like Animal.Null instead of Animal.Cat and the unit test would fail. Though a simple code change would make this work, a more complex issue may take weeks to fix, but identifying the bug with a unit test could be a less complex task. The application currently being analyzed has 4 years of code that "works". However, recent discussions regarding unit tests has found flaws in the code. Some just need explicit implementation documentation (ex. case sensitive or not), or code that does not execute the bug based on how it is currently called. But unit tests can be created executing specific scenarios that will cause the bug to be seen and are valid inputs. What is the value of checking in unit tests that exercise the bug until someone can get around to fixing the code? Should this unit test be flagged with ignore, priority, category etc, to determine whether a build was successful based on tests executed? Eventually the unit test should be created to execute the code once someone fixes it. On one hand it shows that identified bugs have not been fixed. On the other, there could be hundreds of failed unit tests showing up in the logs and weeding through the ones that should fail vs. failures due to a code check-in would be difficult to find.

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• Moving from a static site to a CMS with new URLs and meta-data for pages

  - by Chris J

  Hi I am in the process of rebuilding a site from static pages to a CMS which will be using mod_rewrite to generate new page URLs. In this process our marketing people and myself have decided to tidy up the descriptions, keywords and titles. Eg: a page which who's URL is currently "website-name/about_us.html" and has a title of "website-name - something not quite page specific" will change to "website-name/about-us/" and title: "about us - website-name" and may have a few keywords and the description changed. Our goal with updating the meta data is to improve our page rankings and try to keep in line with some best practices for SEO. Though our current page rankings are quite good in many aspects, there is room for improvement. All of the pages will also have content changes (like rearranging heading tags, new menu on all pages, new content in footer, extra pieces of dynamic content relating to other pages). In this new site process I plan to use 301 redirects for all the old URLs pointing to the new URLs. My question is what can I expect to happen to the page rankings in Google, in the sort term and long term? Will this be like kicking off a new site which will have to build up trust over time or will the original page rankings have affect?

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• Android - big game universe

  - by user1641923

  I am new to an Android development, though I have much experience with Java, C++, PHP programming and a bit experience with vector graphics too (basic 3d Studio Max, Flash, etc). I am starting to work on an Android game. It is going to be a 2D space shooter/RPG, and I am not going to use any game engines and any 3D party libs. I really want to create a very large game universe, or even pseudo-infinite (without visible borders, as if it were a 2D projection of a sphere). It should include 10-12 clusters of 7-8 planets/other space objects and random amount of single asteroids/comets, which player can interact with and also not interactive background. I am looking for a least complicated aproach to create such a universe. My current ideas are: Simply create bitmaps with space scenery background so that they can be tiled seamlessly repeated and construct my 2D universe of this tiles, then place interactive objects (planets, other spaceships) on it. Using vector graphics. I would have a solid color background, some random background objects and gradients here and there. My problems here: Lack of knowledge of how well vector graphics is integrated in Android. Performance? Memory usage? Does Android manage big bitmaps well? Do all of the bitmaps have to be in memory during all game process? I am interested in technical details regarding each of the ideas and a suggestion, which I should go with.

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• MS Excel Vba/Macro equivalent in LibreCalc or OpenOfficeCalc

  - by ReggieCL

  is there an equivalent macro/vba in libre calc that does this routine; - Read/open xls files in a path and do a batch import/copy of read sheets and merge it with the current open workbook. Here's the vba I used in MS Excel. Thanks in advance Sub Consolidate_Sheets() 'Folder Path to read the xlsx files from Path = "F:\WIP2\Below 25\" filename = Dir(Path & "*.xlsx") Do While filename <> "" Workbooks.Open filename:=Path & filename, ReadOnly:=True For Each sheet In ActiveWorkbook.Sheets 'import/copy sheets from to read xlsx files sheet.Copy After:=ThisWorkbook.Sheets(1) Next sheet Workbooks(filename).Close filename = Dir() Loop End Sub

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• How to quickly save what is currently shown in cmd.exe to a file

  - by Zeiga

  I am asking if there is a quick way/command to save the current standard output from cmd.exe or powershell to a file. For example, I have run a bunch of commands in cmd.exe which generating like hundreds of lines of standard output. Ideally, I am looking for a single command to do "select all" and save to a file automatically. Note: I've read this. But I don't want to change my original commands, so "" or "" redirection cannot be used in this scenario. Thanks.

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• cannot add a user to sysadmin role in SQL Server

  - by George2

  Hello everyone, I am using SQL Server 2008 Management Studio. The current logon account belongs to machine local administrator group. I am using Windows Integrated Security mode in SQL Server 2008. My issue is, after log into SQL Server Management Studio, I select my login name under Security/Logins, then select Server Roles Tab, then select the last item -- sysadmin to make myself belong to this group/role, but it says I do not have enough permission. Any ideas what is wrong? I think local administrator should be able to do anything. :-) thanks in advance, George

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