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Articles indexed in December 2010

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• What are the best websites/web applications for specific languages?

  - by JM4

  Browsing around Stackoverflow, I get overwhelmed with the number of "Why should I learn Python/Ruby/PHP/.Net/jQuery..." and the list goes on. Most answers, although good, are usually battles from language A programmer to language B programmer detailing why one piece sucks more than another. People can discuss the theoretical benefits of one over another but in the end, money/glitz talks and the rest walks. I am more interested in the potential opportunity that can come from one language or another over others. A little background, I am a project manager turned novice 'programmer' out of corporate necessity within the small company I currently work with so I have both relatively no set preference or experience, more out of curiosity. While I realize all are not created equal and for similar things, I think it would be interesting to start a list of the best websites / web applications built on specific languages/frameworks just to highlight the possibilities with each and give somebody like me motivation to say "How the heck was that done? Time to buy a book/take a class and learn." Tell me and I will forget, Show me and I will learn, Involve me and I will understand - Teton Lakota

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• Android pattern for activity "flows"

  - by Otto

  I'm developing an android app that has a bunch of screens (activities) that are supposed to have "continue" and "back" buttons at the top. Can you tell me the right pattern for implementing this? I've seen some iPhone apps that have this but Android apps usually don't (I think partly because the back button is part of the phone). I found a post online about an Activity class that has "sub activities" which kind of seems like what I want to do, but I'm wondering if there's a simpler solution or pattern for creating flows like this (in which several activities are linked with continue/back buttons).

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• Unload event for the default AppDomain?

  - by Zor

  Hi, I need to have an event fired whenever any AppDomain unloads - including the default one of the process. The problem with AppDomain.DomainUnload is that it only fires for non-default AppDomains. Furthermore, AppDomain.ProcessExit has limited execution time, which I cannot rely on. Any suggestions as to how I can achieve this would be greatly appreciated! (Alternatively, having an event fired when a background thread (Thread.IsBackground == True) works too.) Thanks in advance.

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• How can I left-justify numerical output in fortran?

  - by mishaF

  I am writing some simple output in fortran, but I want whitespace delimiters. If use the following statement, however: format(A20,ES18.8,A12,ES18.8) I get output like this: p001t0000 3.49141273E+01obsgp_oden 1.00000000E+00 I would prefer this: p001t0000 3.49141273E+01 obsgp_oden 1.00000000E+00 I tried using negative values for width (like in Python) but no dice. So, is there a way to left-justify the numbers? Many thanks in advance!

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• Getting Factors of a Number

  - by Dave

  Hi Problem: I'm trying to refactor this algorithm to make it faster. What would be the first refactoring here for speed? public int GetHowManyFactors(int numberToCheck) { // we know 1 is a factor and the numberToCheck int factorCount = 2; // start from 2 as we know 1 is a factor, and less than as numberToCheck is a factor for (int i = 2; i < numberToCheck; i++) { if (numberToCheck % i == 0) factorCount++; } return factorCount; }

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• How does one reduce a list of boolean values in Common Lisp?

  - by postfuturist

  Given a list of values, I want to reduce the list to T if all the elements are not NIL, NIL if not. This gives me an error: (apply #'and (get-some-list)) As does this: (reduce #'and (get-some-list)) This is the best I've come up with: [11]> (defun my-and (x y) (and x y)) MY-AND [12]> (reduce #'my-and '(T T T T T)) T [13]> (reduce #'my-and '(T T T T NIL)) NIL Why is "#'and" invalid? Is there a more idiomatic way to do this in Common Lisp?

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• RMO on Windows 7 - The Specified module could not be found

  - by AGoodDisplayName

  My machine: Windows XP (x86), VS2008, .net 3.5, sql server 2005, WinForms - App works fine. Production Machines: Windows 7 (x64), SQl Server 2005 Express - App Starts but throws exception Visual Studio Targeting x86 on setup project and RMO project. Visual Studio gives me a a couple warnings but I can still build: Unable to find dependency 'MICROSOFT.SQLSERVER.MANAGEMENT.SQLPARSER' (Signature='89845DCD8080CC91' Version='10.0.0.0') of assembly 'Microsoft.SqlServer.Smo.dll' Unable to find dependency 'MICROSOFT.SQLSERVER.MANAGEMENT.SQLPARSER' (Signature='89845DCD8080CC91' Version='10.0.0.0') of assembly 'Microsoft.SqlServer.Management.SmoMetadataProvider.dll' This is a simple RMO (Replication Management Objects) app that initiates a pull subscription in SQL Server 2005 and displays status. Works fine on my machine, but fails on the production machine. I'm using a setup project to install the app on the production machine, but I think I'm missing a dependency somewhere, but I can't figure it out. On the production machine the app starts fine, but when I try to synch the subscription i get: System.IO.FileNotFoundException: The Specified module could not be found. (Exception from HResult: 0x8007007E)

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• Determine if PowerShell function is running as part of a pipeline?

  - by Richard Cook

  Can a PowerShell function determine if it is being run as part of a pipeline? I have a function which populates an array with instances of FileInfo which I would like to "yield" to the pipeline if the function is being run this way or produce some pretty output if the function is being invoked by itself from the command line. function Do-Something { $file_infos = @() # Populate $file_infos with FileInfo instances... if (INVOKED_IN_PIPELINE) { return $file_infos } else { foreach ($file_info in $file_infos) { write-host -foregroundcolor yellow $file_info.fullname } } } Basically, I'm trying to figure out how to implement INVOKED_IN_PIPELINE. If it is run in a pipeline (e.g. Do-Something | format-table fullname), I would simply yield the array, but if run directly (e.g. Do-Something), it would simply pretty-print the output. Is there a way to do this? If there is a more "idiomatic" way to achieve this kind of thing, I would also be interested to know.

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• Regarding some Update Stored procedure

  - by Serenity

  I have two Tables as follows:- Table1:- ------------------------------------- PageID|Content|TitleID(FK)|LanguageID ------------------------------------- 1 |abc |101 |1 2 |xyz |102 |1 -------------------------------------- Table2:- ------------------------- TitleID|Title |LanguageID ------------------------- 101 |Title1|1 102 |Title2|1 ------------------------ I don't want to add duplicates in my Table1(Content Table). Like..there can be no two Pages with the same Title. What check do I need to add in my Insert/Update Stored Procedure ? How do I make sure duplicates are never added. I have tried as follows:- CREATE PROC InsertUpdatePageContent ( @PageID int, @Content nvarchar(2000), @TitleID int ) AS BEGIN IF(@PageID=-1) BEGIN IF(NOT EXISTS(SELECT TitleID FROM Table1 WHERE LANGUAGEID=@LANGUAGEID)) BEGIN INSERT INTO Table1(Content,TitleID) VALUES(@Content,@TitleID) END END ELSE BEGIN IF(NOT EXISTS(SELECT TitleID FROM Table1 WHERE LANGUAGEID=@LANGUAGEID)) BEGIN UPDATE Table1 SET Content=@Content,TitleID=@TitleID WHERE PAGEID=@PAGEID END END END Now what is happening is that it is inserting new records alright and won't allow duplicates to be added but when I update its giving me problem. On my aspx Page I have a drop down list control that is bound to DataSource that returns Table 2(Title Table) and I have a text box in which user types Page's content to be stored. When I update, like lets say I have a row in my Table 1 as shown above with PageID=1. Now when I am updating this row, like I didn't change the Title from the drop down and only changed Content in the text box, its not updating the record ..and when Stored procedure's Update Query does not execute it displays a Label that says "Page with this title exists already." So whenever I am updating an existing record that label is displayed on screen.How do I change that IF condition in my Update Stored procedure?? EDIT:- @gbn :: Will that IF condition work in case of update? I mean lets say I am updating the Page with TitleID=1, I changed its content, then when I update, it's gonna execute that IF condition and it still won't update coz TitleID=1 already exits!It will only update if TitleID=1 is not there in Table1. Isn't it? Guess I am getting confused. Please answer.Thanks.

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• Problem with pattern matching in ocaml

  - by Antony

  I wrote the function used to decompose a Boolean function, the problem is that the compilation I get this : "Warning 5: this function application is partial, maybe some arguments are missing." How can I solve this problem? I've set wrong the patter matching or I can not run this operation with pattern matching The code is the following: let rec decomposition state_init state prec formula = match formula with And form -> (fun () -> let f1 = List.hd form in let f2 = And(List.tl form )in let new_state = Forms (state_init,f1) in decomposition state_init new_state state f1; decomposition state_init new_state state f2; Hashtbl.add graph new_state (("",false,state :: []) , []) ; let x = Hashtbl.find graph state in let succ = state :: snd x in let (desc,last,ptrs) = fst x in Hashtbl.replace graph state ( ("And-node",last,ptrs) , succ))

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• How to use Speech 2 Text in Microsoft Surface

  - by Roflcoptr

  I'd like to use some speech 2 text in my microsoft surface application. I saw that it is possible, but I don't really know where to start. Is there any framework/library available, or a code snippet, or a tutorial?? I don't even know exactly what i should google for ;) ===EDIT=== I read that it is necessary to use a grammar to recognize words. So if I want to proceed free text, is there a predefined grammar for the english language? Or is it a better choice to don't use speech2text but just audio files instead?

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• Partial Upload With storbinary in python

  - by brian

  I've written some python code to download an image using urllib.urlopen().read() and then upload it to an FTP site using ftplib.FTP().storbinary() but I'm having a problem. Sometimes the image file is only partially uploaded, so I get images with the bottom 20% or so cut off. I've checked the locally downloaded version and I have successfully downloaded the entire image, which leads me to believe that it is a problem with storbinary. I believe I am opening and closing all of the files correctly. Does anyone have any clues as to why I'm getting a partial upload with storbinary? Update: When I run through the commands in the Python shell, the upload completes successfully, I don't know why it would be different from when run as a script...

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• Defining a dd/mm/yyyy field within an abstract table model

  - by Simon Andi

  I have defined an abstract table model but one of the columns should house date values as dd/mm/yyyy format not sure how to do this. I have a external global file and have hard coded the dates as dd/mm/yyyy. How can I define this column within my abstract table model so that to only allow only dates having dd/mm/yyyy format. public class OptraderGlobalParameters { public static boolean DEBUG = true; //Set DEBUG = true for Debugging /*=========================*/ /*Table Array For Dividends*/ /*=========================*/ public static String[] columnNames = {"Date", "Dividend", "Actual", "Yield (%)" }; public static Object[][] data = { {"dd/mm/yyyy", new Double(5), new Boolean(false), new Boolean(false)}, {"dd/mm/yyyy", new Double(5), new Boolean(false), new Boolean(false)}, {"dd/mm/yyyy", new Double(5), new Boolean(false), new Boolean(false)}, {"dd/mm/yyyy", new Double(5), new Boolean(false), new Boolean(false)}, {"dd/mm/yyyy", new Double(5), new Boolean(false), new Boolean(false)}, }; }

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• Awesome Read: Buck Woody&rsquo;s post on the proper use of the Windows Azure VM Role

  - by Enrique Lima

  I have heard some service providers (or cloud providers), hosting companies and such complain, criticize or even venture to call foul on Microsoft’s Azure VM Role.  The problem:  None of them have gone through the effort of truly understanding (or perhaps not wanting to know) what is going on there.  Many have jumped right into the “purist” definition of IaaS, or PaaS for that matter. Ok, Buck’s post is a true gem (my opinion) in the sense it gives you parallels of what the VM Role is and is not.  And it brings Hyper-V and SCVMM to the forefront explaining what it is and what it also offers to the IaaS Microsoft offers. Here is an excerpt of the summary, but please go on over to read his post it will clear a lot if you are wondering when and how to use the Windows Azure VM Role. The excerpt: “Virtualizing servers alone has limitations of scale, availability and recovery. Microsoft’s offering in this area is Hyper-V and System Center, not the VM Role. The VM Role is still used for running Stateless code, just like the Web and Worker Roles, with the exception that it allows you more control over the environment of where that code runs.” The source and post:  Buck Woody -http://blogs.msdn.com/b/buckwoody/archive/2010/12/28/the-proper-use-of-the-vm-role-in-windows-azure.aspx?wa=wsignin1.0

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• How do I identify and fix the cause of transaction log growth on SIMPLE recovery model databases?

  - by Stuart B

  I recently upgraded our SQL Server 2008 installations to service pack 2. One of our databases is on the simple recovery model, but its transaction log is growing extremely fast. The path I'm currently investigating is that we have a transaction somewhere out there stuck in active state. Here is why: select name, recovery_model_desc, log_reuse_wait_desc from sys.databases where name in ('SimpleDB') name recovery_model_desc log_reuse_wait_desc SimpleDB SIMPLE ACTIVE_TRANSACTION When I check my active transactions, I get the following. Note that I installed SP2 and restarted our server on 12/25 at around noonish. select transaction_id, name, transaction_begin_time, transaction_type from sys.dm_tran_active_transactions transaction_id name transaction_begin_time transaction_type 233 worktable 2010-12-25 12:44:29.283 2 236 worktable 2010-12-25 12:44:29.283 2 238 worktable 2010-12-25 12:44:29.283 2 240 worktable 2010-12-25 12:44:29.283 2 243 worktable 2010-12-25 12:44:29.283 2 245 worktable 2010-12-25 12:44:29.283 2 62210 tran_sp_MScreate_peer_tables 2010-12-25 12:45:00.880 1 55422856 user_transaction 2010-12-28 16:41:56.703 1 55422889 SELECT 2010-12-28 16:41:57.303 2 470 LobStorageProviderSession 2010-12-25 12:44:30.510 2 Note that according to the documentation a transaction_type of 1 means read/write, and 2 means read-only. So, my line of thinking is that the trans_sp_MScreate_peer_tables transaction is stuck for some reason and holding up transaction log truncation. Is this a plausible scenario? Correct me if my line of thinking is off, as I'm not a SQL Server expert. If this is correct, how do I erase that transaction so that my transaction log is truncated as usual?

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• Solaris NFS: user permissions

  - by cjavapro

  I am very new to NFS. I would like to make sure I am clear. If the NFS server shares a directory rw,, and all the files in the directory are permissions 700 and user/group for those files is root/root,,, On the client you would have to log in as root to see it. Is this correct? I am aware that a non root user on the client could make a direct connection to override this. (as in don't use the mount, just use an NFS client hack.) It really seems like anyone who has access to the client machine should have access to the files and that the client machine should be ignoring permissions. Only the server should handle permissions. Am I correct in my understanding? Is it normal to have this type of layout? Is there a way to ignore the permissions on the client side?

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• Configure a app in a subpath in nginx

  - by Rubem Azenha

  I have a nginx + passenger + single rails app setup in a Fedora server. My nginx.conf regarding my app looks something like this: server { listen 80; server_name myapp.mycompany.com; root /opt/apps/myapp_large_name/public; passenger_enabled on; client_max_body_size 4M; } So when I access myapp.mycompany.com.br it access to my rails app under /opt/apps/myapp_large_name/public. I want to be able to configure a subpath to access to another app (in this case, monit). I want something like that: myapp.mycompany.com.br/monit access the monit app. Is it possible?

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• netstat on fresh install of Solaris 10 update 9

  - by cjavapro

  I am attempting to decipher the below output bash-3.00$ netstat -a UDP: IPv4 Local Address Remote Address State -------------------- -------------------- ---------- *.sunrpc Idle *.* Unbound *.32771 Idle TCP: IPv4 Local Address Remote Address Swind Send-Q Rwind Recv-Q State -------------------- -------------------- ----- ------ ----- ------ ----------- *.* *.* 0 0 49152 0 IDLE *.sunrpc *.* 0 0 49152 0 LISTEN *.* *.* 0 0 49152 0 IDLE localhost.5987 *.* 0 0 49152 0 LISTEN localhost.898 *.* 0 0 49152 0 LISTEN localhost.32771 *.* 0 0 49152 0 LISTEN localhost.5988 *.* 0 0 49152 0 LISTEN localhost.32772 *.* 0 0 49152 0 LISTEN *.ssh *.* 0 0 49152 0 LISTEN *.32785 *.* 0 0 49152 0 BOUND localhost.6788 *.* 0 0 49152 0 LISTEN localhost.6789 *.* 0 0 49152 0 LISTEN localhost.32782 *.* 0 0 49152 0 LISTEN localhost.smtp *.* 0 0 49152 0 LISTEN localhost.submission *.* 0 0 49152 0 LISTEN server-host-name.ssh pc-host-name.51269 64868 51 49640 0 ESTABLISHED TCP: IPv6 Local Address Remote Address Swind Send-Q Rwind Recv-Q State If --------------------------------- --------------------------------- ----- ------ ----- ------ ----------- ----- *.* *.* 0 0 49152 0 IDLE *.ssh *.* 0 0 49152 0 LISTEN SCTP: Local Address Remote Address Swind Send-Q Rwind Recv-Q StrsI/O State ------------------------------- ------------------------------- ------ ------ ------ ------ ------- ----------- 0.0.0.0 0.0.0.0 0 0 102400 0 32/32 CLOSED Active UNIX domain sockets Address Type Vnode Conn Local Addr Remote Addr ffffffff84e25ab8 stream-ord ffffffff8569c740 00000000 /var/run/.inetd.uds bash-3.00$ It looks to me like we have the following items UDP IPv4 Open ports sunrpc, 32771 Question 1: What is *.* Unbound? TCP IPv4 Open ports sunrpc, ssh 10 ports open only for localhost The open ssh connection from my PC Question 2: What is *.32785 *.* 0 0 49152 0 BOUND? Question 3: What is *.* *.* 0 0 49152 0 IDLE? (shows up twice) IPv6 Open port ssh Question 3: What is *.* *.* 0 0 49152 0 IDLE? Question 4: What is SCTP? Question 5: What is Active UNIX domain sockets

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• How can I run a game server on a computer behind a NAT, if I have another computer not behind a NAT?

  - by Macha

  My home connection is part of a large NAT, outside my control. Inside my home, my router has a NAT, under my control. I control a public facing Linux VPS with one IP address, outside my home network. Ideally, what I'd like to do is set something up so that I connect my home computer to my VPS, and after that port X on my VPS leads to port Y on my home computer, for the purposes of running a game server of a game that does not run under Linux. Is this possible?

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• Make Google Chrome's address bar prefer page titles to domain names when offering completions?

  - by Ryan Thompson

  I've recently switched from Firefox to Chrome, and the thing I miss most from Firefox is the "Awesome Bar" that suggests completions for what I type primarily based on page titles, and then secondarily based on domain names. Chrome offers both matching URLs and titles, just like like Firefox, but Chrome seems to always prefer a matching domain name over a matching page title or a match to another part of the URL (besides the domain), no matter how many times I pass over the former for the latter. In fact, Chrome also prefers to suggest a search rather than matching anything other than a domain name. So is there any hidden preference I can change to tell Chrome that I care more about page titles than domain names? Example: I want to go to Google Reader, so I press Control+L and begin typing "reader". The URL for google reader is http://www.google.com/reader/view/#overview-page, so the domain name is www.google.com, which does not contain the word "reader". So the first option that Chrome suggests is either another site that has "reader" as part of the domain, or a search for "reader" with the default search engine. No matter how many times I scroll down and select Google Reader, Chrome never "learns" that that's what I want.

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• Network Drive Via Ethernet Port for Speed?

  - by Yar

  I have a Macbook with Firewire 400 and USB 2.0, so the only way I can get fast external storage is through the Ethernet port. A really fast firewire 800 drive on ANOTHER computer is actually much faster than the built-in drive (according to XBench). So I thought I would try to go one better and buy an ethernet-ready drive. I bought a Seagate GoFlex™ Home Network Storage System, and it seems like the only way to get it to work is to plug it into a router. Can this drive be used without a router (i.e., direct to computer)? Are there any drives that can be plugged directly into the ethernet port for fast access? I don't want the drive on my router: I want it on my computer. Ideally I'd need 7200rpm or faster, too... Update: Just chatted with Seagate and they said that this particular drive will not work that way. Will any others?

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• Internet mobile : + 1567 % d'applications téléchargées en 2010 et croissance exponentielle du trafic de données

  Internet mobile : + 1 567% d'applications téléchargées en 2010 Et croissance exponentielle du trafic de données Une vidéo intéressante fait un tour d'horizon rapide sur les tendances du mobile au cours de l'année 2010 et nous livre quelques statiques . Le succès des Smartphones sans doute dû à la variété de possibilités qu'ils offrent aux utilisateurs se traduit par une croissance fulgurante du nombre de téléchargements, de l'utilisation des réseaux sociaux et du taux de transfert des données via les téléphones mobile. Premier fait marquant au cours de l'année 2010, les applications disponibles sur les différentes galeries ont connu une croissance considérable avec...

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• New PeopleTools Developer Book Available

  - by matthew.haavisto

  I recently had an opportunity to work through a copy of a new book for PeopleTools developers and thought it might be of interest to the readers of the PeopleTools blog. It is called PeopleSoft PeopleTools Tips & Techniques, and was written by Jim Marion, a long-time Oracle employee we often recruit to deliver the very popular and highly regarded conference sessions of the same title. This book is not for the beginner and doesn't contain much introductory material. Instead, it's for the more experienced PeopleSoft developer looking to maximize the efficiency and productivity of their PeopleSoft applications. Throughout the book Jim offers proven methods and best practices he's worked with personally. PeopleSoft PeopleTools Tips & Techniques lays out the benefits of many tactics along with implementation considerations, programming instructions, and reusable code samples. It will help you construct powerful iScripts, build custom UIs, work with Java and Ajax, and integrate the latest Web 2.0 features. Test-driven development, application security, performance tuning, and debugging are also covered in this authoritative resource. This book was one of the best sellers at the Oracle bookstore during the most recent Oracle Open World conference. The book can be ordered here and here. You may also want to check out Jim's PeopleTools developer blog.

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• What's the best way to move to linux from windows for web development ?

  - by rajesh pillai

  I am primarily a programmer developing on windows based OS using c# as my primary language. I am evaluating Ubuntu Linux as an alternate platform and would like to know the best stack for doing web development on this. I had gone through the following thread Moving development from Windows to Linux but it doesn't answer my questions fully. Some of the points I am interested are outlined below PHP/Ruby/Python (What would you recommend?) Is Mono mature enough for any large scale development? Has anyone any real experience using Mono. IDE (including debugging support, intellisense, source control integration,Unit testing) Unit testing framework based on the language recommended Web framework if any. Load Testing tools Web server (I know there are many webservers, but would like to know which one is primarily used by most people) Your inputs is greatly appreciated. Thanks.

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• Why would you hire in-house software developers instead of outsourcing them to develop a product for your company?

  - by Terence Ponce

  Why would you hire in-house over outsourcing in developing a product for your company? I can only think of a few but I'm not entirely sure if they're good enough reason. This is actually for a debate that I'm going to have in class. I'm more inclined on the outsourcing part but unfortunately, I was asked to switch to the in-house side of the debate. Any ideas? UPDATE Thanks for the answers guys. The debate went well because of them. I'm pretty sure our side won the debate because of the points presented here.

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