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• Everything you need to know about Silverlight 4

  Silvertlight 4 got release this week and with that blogs and social media got a fantastic coverage of the details, hopefully I got the ones that will help you to get started fast. Step 1: Install VS2010 unless you want to keep using the WP7 SDK to write applications, the new release does not include the beta of Windows Phone 7. http://www.microsoft.com/visualstudio/en-us/download Step 1.5: If you developing apps for Window Phone 7 check this link for the information. Step 2: Make sure your...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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• How can I apply Readme Driven Development to an ongoing project?

  - by Metalcoder

  I'm assigned to a project where the goal is to update an existing software. This software was developed in a totally ad hoc manner, which means that any documentation generated is outdated, confused and just plain useless. I do not want to retroactivelly produce all the missing artifacts, since this would just be a waste of time. The code base is ugly, and really need some serious refactoring, but this is another story. What I want is to apply Readme Driven Development to guide this project. So, basically, I want to write a Readme, which will document every change meaningful at the user level. The problem is, I have no idea about how to structure this document. For me, it's pretty clear that it should have a different layout than the traditional Readme. I really want to document changes, and not the current state of affairs. Any ideas?

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• How can I effectively use a netbook and a desktop computer together for programming?

  - by Mana

  Currently, in my workspace, I have a netbook sitting off to the side gathering dust while I write code on my desktop. As a result, the only use my netbook gets coding-wise is when I'm writing up a quick Python script to model a given problem or concept in class; I never use it at home for coding, or for anything at all, as it is all possible and faster on my (much more powerful) desktop. I feel like this is wrong and that I should be making better use of my netbook. What effective uses have you found for a netbook and a desktop together when programming (or for software development in general)? What are the merits of this practice?

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• Rewriting software using Agile methodologies

  - by Asier

  Suppose you have to rewrite an entire application using Agile methodologies, how would you do it? I guess you could write a big bunch of user stories based in the behavior of your current system. And then implement them in small iterations. But this wouldn't mean that we have the requirements UP FRONT?? Also, when would you start releasing? Agile says we should release early and often, but it doesn't make much sense to release before the complete rewrite has been completed. Anybody has used Agile before to rewrite software? How did you do it?

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• IE9 Preview disables CLR DEVPATH feature

  (This is not related to IKVM.NET, but since I spent several hours tracking this down, I thought I'd write it up here in the hope anyone else struggling with this will find it.) One of the lesser known (development) features of the CLR is the ability to override the regular Fusion assembly loading rules by setting the DEVPATH environment variable (and adding an entry to the machine.config to enable this). It turns out that this feature can be disabled...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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• can't chmod on external hard disk?

  - by G. He

  I have an USB3.0 external hard disk, partitioned to 3 NTFS partitions. When I plug the hard disk in, the 3 partitions automatically mounted under /media. So far so good. I can read and write to files, or mkdir, etc on these partitions. But I can't do chmod/chown on any of the files/directories on these partitions. The owner:group always myself, and the mode are always 700 for directories and 600 for files. I have another partition on internal harddisk also mounted. That partition works fine. I looked the output of mount command, the only difference between mount options is that there is one extra 'default_permissions' on the external hard disks. Anyway I can set the owner:group and mode on these files and directories.

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• algoritm and structure pseucode [closed]

  - by user72759

  Create entries, which administers the test, which is 20 questions, the responses and fixed the 5 correct answer for each question. Write this test, if the execution of the algorithm to each recipe realisations change the order of questions and answers and responses are notified by user enters the correct answer. 2. Writin' example, where the line 2 is used stack. Create a stack of 20 items that the first element is 1, and the next is calculated by the formula an=an-1+1/an-1. Found this stack items that are whole numbers.

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• What program to use to create subtitles for a video?

  - by user4124

  I have a video that I want to create subtitles for. Is there a program that can perform rudimentary speech-to-text in order to set the correct start/stop of each individual subtitle create rudimentary text subtitles (using some sort of speech-to-text) I know about gnome-subtitles. However, it requires extensive effort to create those subtitles manually. You need to select yourself the start and stop for each sentence. Youtube has the above features (creates rudimentary text subtitles at the correct timings, using speech-to-text). However I would rather not upload the videos to Youtube just to get my subtitles. Is it possible to do the subtitles efficiently in Ubuntu? Update: I plan to use the .srt subtitles only, and do not need to hard code them on the videos. My biggest requirement is to have the program automatically find the start/stop for each sentence, so that I write the text in it.

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• Elastic Collision Formula in Java

  - by Shijima

  I'm trying to write a Java formula based on this tutorial: 2-D elastic collisions without Trigonometry. I am in the section "Elastic Collisions in 2 Dimensions". In step 1, it mentions "Next, find the unit vector of n, which we will call un. This is done by dividing by the magnitude of n". My below code represents the normal vector of 2 objects (I'm using a simple array to represent the normal vector), but I am not really sure what the tutorial means by dividing the magnitude of n to get the un. int[] normal = new int[2]; normal[0] = ball2.x - ball1.x; normal[1] = ball2.y - ball1.y; Can anyone please explain what un is, and how I can calculate it with my array in Java?

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• New IDE Features in Visual Studio 2010 for C# Developers

  After a quick review of C# language features, lets do the same for the IDE improvements. So, whats in there for C# developers? Generate From Usage This feature greatly improves Visual Studio support for test-driven development (TDD). However, it is useful even if you dont use TDD at all. It might increase your productivity by simply reducing the number of keystrokes and eliminating repetitive typing. For example, now I can write code like this: class Program{    static void...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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• Writing files to an Airport Extreme using afp

  - by Bill Oldroyd

  Using Nautilus I can connect from Ubuntu 12.04 (64-bit) to my Apple Airport Extreme using user & password without a problem. I can read, browse folders and delete files. However I cannot write files, the file is created, but the contents of the file are not transferred. The transfer fails with the error message "kFPMiscErr" which I think means that "authentication has already been established" ?. I have tried the command line tools for access using AFP but these do not work either. Is there a solution to this problem ?

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• Twin Cities Connected Systems User Group Meeting - March 11th, 2010

  If you are in are in Minneapolis on Thursday March 11th please join us for the Twin Cities Connected Systems User Group Meeting. The meeting takes place at 6:00 p.m. at the Microsoft offices at 8300 Norman Center Drive, Bloomington, MN 55437.  I will be speaking on How to Create Windows Server AppFabric Applications Here is a write-up of what will be covered: You have heard about Dublin, now called Windows Server AppFabric, but do you know what it is and what it includes?  Do you know...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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• System crashed while upgrading, now unable to recover. Please help

  - by longloop

  Yesterday while upgrading from 11.4 to 11.10, due to power cut my system crashed. Ubuntu is unable to boot. While booting I get two options in grub, one is for recovery mode and the other is for normal ubuntu booting (and others are also thr for mem check and booting to windows). When I try to boot it normally, it pauses booting while displaying ' Checking battery statues' . Though i am not using a laptop, I am on a desktop. And In recovery mode the menu has 4 options - resume boot, fsck , remount and root ( to goto shell prompt) . If I go to shell and type ' apt-get dist upgrade' , it shows - W: not using locking for read only lock file /var/lib/dpkg/lock E:unable to write to /var/cache/apt E:The package lists or status files could not be parsed or opened. Please instruct me to recover from this situation.

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• DTrace 0.3.1 for Linux ???

  - by katsumii

  ???Solaris DTrace??????????????Linux??? 3????????????????????????Project News: DTrace - oss.oracle.com2012.10.01: DTrace 0.3.1????????????????????????????????????????????????? DTrace update to 0.2 (Wim Coekaerts Blog)on Feb 22, 2012We just put an updated version of DTrace on ULN. This is version 0.2, another preview (hence the 0.x...) ?????????? DTrace Toolkit ???????????????????? ????????????????????????????Adam Leventhal's blog » DTrace OEL updatehoping some of the dtrace toolkit dtrace goodies would work??Oracle??? "Grid Infrastucure" ???????????????????????# Bin/rwbypid.d Tracing... Hit Ctrl-C to end. ^C PID CMD DIR COUNT 7211 rwbypid.d W 2 2401 cssdmonitor W 6 7007 sshd W 12 7007 sshd R 19 2082 ohasd.bin R 59 2084 ohasd.bin R 59 2202 evmd.bin W 152 2074 ohasd.bin W 1788 2230 evmd.bin R 3528 OS??????????Read/Write??????????????????????????????? ?????????????????????????????

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• How to retrieve certificate from my store personal? [closed]

  - by shariphwar

  I want to use the following code by java program. How to convert the following C# code to java code or how to write just like this code by java programming language? Access certificate by C# X509Store store = null; X509Certificate2Collection _recipients = null; // select the right store //if (lstRecipients.Text=="Personal") store = new X509Store(StoreName.My, StoreLocation.CurrentUser); // else // store = new X509Store(StoreName.AddressBook, StoreLocation.CurrentUser); // open store and show certificate picker store.Open(OpenFlags.ReadOnly); X509Certificate2Collection tempCollection = X509Certificate2UI.SelectFromCollection(store.Certificates, "Crypter", "Select a Certificate for Encryption", X509SelectionFlag.MultiSelection); store.Close();

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• Which one is better to get started? [closed]

  - by vanangamudi

  Which one of the open-source game engine is better to get started? I read several threads over several forums and found that it is better to write own game engine specific to application. But I need to know the requirements of a game engine, other than Graphics, Physics and AI... Many people suggested Unity, But I need open-source version so that I can have a look at implementation... so I google rigorously and found some unknown game engines(at least to me) Unvanquished Cube Spring Pyrogenesis Torque3D CrystalSpace Panda3D Delta3D Irrichlt OpenArena AlienArena (please list others if I missed anything....) FYI: my present focus is on FPS/TPS. Can you tell me which one is better at performance if possible? Torque3D claims to be the best opensource engine - is that true, and if so to what extent?

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• How can I make my generic comparer (IComparer) handle nulls? [closed]

  - by Nick G

  Hi, I'm trying to write a generic object comparer for sorting, but I have noticed it does not handle the instance where one of the values it's comparing is null. When an object is null, I want it to treat it the same as the empty string. I've tried setting the null values to String.Empty but then I get an error of "Object must be of type String" when calling CompareTo() on it. public int Compare(T x, T y) { PropertyInfo propertyInfo = typeof(T).GetProperty(sortExpression); IComparable obj1 = (IComparable)propertyInfo.GetValue(x, null); IComparable obj2 = (IComparable)propertyInfo.GetValue(y, null); if (obj1 == null) obj1 = String.Empty; // This doesn't work! if (obj2 == null) obj2 = String.Empty; // This doesn't work! if (SortDirection == SortDirection.Ascending) return obj1.CompareTo(obj2); else return obj2.CompareTo(obj1); } I'm pretty stuck with this now! Any help would be appreciated.

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• Does Turing-complete implies possibility of malware? [closed]

  - by Mathematician82

  Is it possible to build an operating system that contains some Turing complete compiler (language?) but is unable to run any malware? Or is there any definition for a malware? This question popped on my mind as I was wondering why Windows has more malware than Linux. If Linux contains a C programming language and its compiler, I think it is possible to write a Linux program that works similarly than Windows viruses. But there are less malware for Linux than for Windows although there is a Wine for Linux to simulate Windows programs.

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• sed problem ....

  - by moata_u

  hello there ... am facing problem in sed command , i was trying write a bash script that do the following : 1. search for the line that contain :@ , 2.then save the line that contained :@ and replace it with new line ....as following : ! /bin/bash echo "Please enter the ip address of you file" read ipnumber find=grep ':@' application.properties # find the line input="connection.url=jdbc\racle\:thin\:@$ipnumber\:1521\:billz" # preparing new line echo sed "s/'${find}'/'${input}'/g" application.properties # replace old with new line **Problem is nothing happen !!!! * I already tried to use "${find}" instead of '${find}'

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• Bluetooth connectivity on Ubuntu 11.04

  - by Andy Wiz

  I tried to connect to a device via Bluetooth from my laptop running Ubuntu 11.04, and I have some difficulty. I had to write a script to restart the Bluetooth dongle (it does not activate Bluetooth automatically). An icon appears in the top status bar on Ubuntu (good). Pairing of the devices happen easily enough (good). Trying to view files on the device from the laptop, the window that comes up does not show the paired devices. There is a window, but it's too small, and you dont know which device is selected (bad). If you choose the wrong device (I only knew it was the wrong device when my cell phone lit up), the icon on the status bar disappears, and doesn't come back, even though the devices are still paired (bad). Does anyone have that problem, and is there a fix? A.

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• When it Comes to SEO Services, There Are Plenty of Link Building Service Providers to Choose From

  How many SEO services providers are out there as of this date is anyone's guess but when it comes to picking one, it's not really easy to pick one out of so many. Since any SEO company can write anything they wish or claim anything on their site, it is important to validate such claim before hiring an SEO company. Do a little research on Google about the SEO Company in question who you want to hire for your link building service. This way you will run into some reviews posted by previous clients based on which you can make a decision.

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• How to separate and maintain customer specific code

  - by WYSIWYG

  I am implementing customer specific code and currently following simple approach like if (cusomterId == 23) do it. I want to separate out all the customer related code in separate place. But I have following problems. In code is in 1. Stored procs 2. Plain old classes. 3. Controllers 4. Views I came up with two solutions. First is to create table CustomerFunctionlity with columns CustomerId, FunctionalityName, method/Proc, inputs/outputs With this table I can simply check if exists, execute given function. Another way is creating a factory which returns customer related object for an interface. I am writting small end to end customer specific functionalities. How can I write maintenable code. Thanks

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• How to install texlive2011?

  - by vrx

  I just moved from Windows to Ubuntu. Software Center in Ubuntu does have texlive2009 package. There is no straightforward installation process from TUG, or from Google search result. I found some installation of Texlive2010 but it does not work. Here are the step: download an texlive2011.iso, 2.3GB and save in local drive mount to a virtual drive install perl tk (ok) "sudo ./install-tl" does not work, "perl ./install-tl" shows pre-installation setting but it does not have the write access to /usr/local/textlive/2011/ Finally, I'm stuck Please guide me with a step by step tutorial or suggest any other solution beside typing in the black screen without knowing what is going on behind the Terminal.

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• 12.10 Unity GUI Not Displaying

  - by lolajl

  I had 12.04 installed and had no problems at all, having had it setup on my Compaq Presario CQ62 for about 2 weeks (I'm new to Ubuntu and I had a spare laptop to experiment with). Last night, I installed 12.10 through the update manager. Now, I'm not seeing the Unity GUI if I select Default or Ubuntu, at all, just the Eclipse launcher which I had created sitting on the desktop. Even hitting the Windows key to bring up Dash doesn't work. But, when I select GNOME during login, I'm able to access everything in the GUI, including the menu folders for games, internet, system settings, etc. There was a couple error message saying that a system file wasn't loading properly but I forgot to write these down, and now these error messages aren't loading when I restart. Will I need to wipe clean and reinstall?

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• Mobile Game Engine

  - by Jason Crosby

  I am trying to track down a game engine for developing mobile games for ios and android. I have been looking for weeks now and havent found what i am looking for. I like jmonkey engine for making desktop games. Its easy to use and it comes with everything you need. Its more that just some libraries. I'm looking for something similar for developing mobile games. I'd like it to be easy to use and have everything included not just a collection of libraries. And I would prefer to write in c++. I'm not looking for "the best". I'm just looking for some engines that match my criteria so I can try them out and see which one works best for me.

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