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• Reinstall TeamCity when Tomcat becomes corrupt

  - by dodegaard

  I've got a TeamCity 4 installation where tomcat has bit the dust with the following error "The APR Based Apache Tomcat Native library which allows for optimal performance in production environments was not found in java.library path". It appears this started happening once the JDK was installed on the server to allow for a compile. The JDK has been removed and the JRE reinstalled but still no go. My question is should I reinstall TeamCity completely or is there a way to simply reinstall tomcat so I don't hose the configuration? Your help is greatly appreciated.

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• Closing an EDM ObjectContext?

  - by David Veeneman

  I am getting started with the ADO.NET Entity Framework 4.0. I have created an EDM and data store for the app, and it successfully retrieves entities. The application holds the EDM's ObjectContext as a member-level variable, which it uses to call ObjectContext.SaveChanges(). So far, so good. I am going to refactor to repositories later. Right now, my question is a bit more basic: When I am finished with the EDM, what do I need to do to release it? Is it as simple as calling Dispose() on the ObjectContext? Thanks for your help.

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• What design pattern do you use the most?

  - by spoon16

  I'm interested in understanding what design patterns people find themselves using often. Hopefully this list will help other recognize common scenarios and the associated design pattern that can be used to solve them. Please describe a common problem you find yourself solving and the design pattern(s) you use to solve it. Links to blogs or documentation describing the pattern are also appreciated. Edit: Please expand on your answers a bit, I would like this to be a useful reference for someone who wants to learn more about design patterns and is curious on what situations a specific design pattern might be used. Nobody has linked to any "more learning" resources.

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• MATLAB is changing variables when I do not want it to.

  - by WVUstudent

  Here is my problem in a small bit of code used as an example, trial(0) function [] = trial(test) disp(test) if(test == 1) disp('test is one') test = 0; end disp(test) Matlab prints out this: 0 'test is one' 0 This is not my real code, there are over 500 lines of it, but this is a section of my code where the problem has risen. I have used the search function to see if I have been incrementing any variables anywhere, and have put in over 2 hours trying to see why MATLAB is changing my variables when I don't want it to.

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• How do I use a ListProperty(users.user) in a djangoforms.ModelForm on Google AppEngine?

  - by Gabriel

  I have been looking around a bit for info on how to do this. Essentially I have a Model: class SharableUserAsset(db.Model): name = StringProperty() users = ListProperty(users.User) My questions are: What is the best way to associate users to this value where they are not authenticated, visa vi invite from contacts list etc.? Is there a reasonable way to present a list control easily in a djangoforms.ModelForm? Once a user logs in I want to be able to check if that user is in the list for any number of SharableUserAsset class "records", how do I do that? Does user evaluate as a match to an email address or is there a way to look up a valid user against an email address?

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• Recommended way to manage persistent PHP script processes?

  - by BigglesZX

  First off - hello, this is my first Stack Overflow question so I'll try my best to communicate properly. The title of my question may be a bit ambiguous so let me expand upon it immediately: I'm planning a project which involves taking data inputs from several "streaming" APIs, Twitter being one example. I've got a basic script coded up in PHP which runs indefinitely from the command line, taking input from the Twitter streaming API and doing very basic things with it. My eventual objective is to have several such processes running (perhaps daemonized using the System Daemon PEAR class), and I would like to be able to manage them from some governing process (also a PHP script). By manage I mean basic operations such as stop/start and (most crucially) automatically restarting a process that crashes. I would appreciate any pointers on how best to approach this process management angle. Again, apologies if this question is too expansive - tips on more tightly focused lines of enquiry would be appreciated if necessary. Thanks for reading and I look forward to your answers.

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• Typed Arrays in Gecko 2: Float32Array concatenation and expansion.

  - by janesconference

  Hi all, I'm a bit confused with Javascript Typed Arrays. What I have several *Float32Array*s, that have no concat method. I'd like to concatenate them all inside another Float32Array, but: as I said before, there is no concatenation method if I try to write past the array length, the array is not expanded (aka this won't work - please note that event.frameBuffer and buffer are both Float32Array and that I don't know what the final length of my buffer will be): var length_now = buffer.length; for (var i = 0; i < event.frameBuffer.length; i += 1) { buffer [length_now + i] = event.frameBuffer[i]; } The only solution I found is to copy the Float32Array in a regular array, that's definitely not what I want. How would you do, stackoverflowers?

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• SQL 2008 Encryption Scan

  - by Mike K.

  We recently upgraded a database server from SQL 2005 to SQL 2008 64 bit. CPU utilization is oftentimes running at 100% on all four processors now (this never happended on the SQL 2005 server). When I run sp_lock I see a number of processes waiting on a resource called [ENCRYPTION_SCAN]. I am not using any SQL 2008 encryption features. Does anyone know why I would have tasks waiting on this resource? It appears that whenever I have four processes waiting on this resource, CPU hits 100% on all four processors.

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• How can you write a function that accepts multiple types?

  - by matthy

  I have a function that should work on int[] and on String[] now i have made the same function with a int parameter and an String parameter however if it has to go this way its a bit copy paste work and doesn't look very organized is there a way to solve this and put these 4 functions in 2? static public void print(String s) { System.out.println(s); } static public void print(int s) { System.out.println(s); } static public void printArray(String[] s) { for (int i=0; i<s.length; i++) print(s[i]); } static public void printArray(int[] s) { for (int i=0; i<s.length; i++) print(s[i]); } Thanks Matthy

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• Swapping UIImages causing 'unrecognized selector sent to instance' ?

  - by user158103

  Error: [__NSCFDate drawAtPoint:]: unrecognized selector sent to instance 0xd251e0 Termininating app due to uncaught exception 'NSInvalidArgumentException' Scenario: for the most part this works. But I notice this error, even on the simulator, when I swapping UIImages, slowly, but consistently. For example, I have a retained reference to a UIImage that im drawing. By the click of a picker control I am changing the face image (this occurs in another view-controller). I can consistently recreate this error by continuously changing the faces. It usually crashes at about the 4th swap or more. My theory: It's not loading the image, therefore the image reference is nil. I know ive read a bit about UIImage being cached, so I wouldnt think im running out of memory. Any ideas? Thanks!

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• Replacing a class with Mono.Cecil

  - by icktoofay

  Say I have assembly A. It was modified with Mono.Cecil a little bit. Now say I have assembly B. It has a class named SomeClass. Assembly A also has a class named SomeClass. Now I want to replace SomeClass from assembly A with the one in assembly B. I tried a few things, but I know that for one of my attempts, it actually remapped a method call like this: Console.WriteLine("Test."); ...into this: int.WriteLine("Test."); That can't be right. What is the correct way to replace a class with Mono.Cecil?

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• What is the best practise to create MSI with some other child MSI as prerequisite?

  - by sankar

  Currently we are using Innosetup as a bootstrapper to install the MSI prerequisites. It makes bit complex to maintain the setup. I found that burn tool which may help us to resolve this issue by having a single setup to install whatever we need. I could not find either documentation or sample for this tool. Is anyone have idea about this? or you can give me the alternate solution if you have. Looking for the alternate soltuion for the actions that we do with ISS bootstrapper now: Extract the files (Main setup, Prerequisite setup) Need to ensure prerequisites status and install on demand. Start main install.

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• Keeping a database structure up to date in a project where code is on subversion?

  - by Bruno De Barros

  I have been working with Subversion for a while now, and it's been incredible for the management of my projects, and even to help managing the deployment to several different servers, but there is just the one thing that still annoys me. Whenever I make any changes to the database structure, I need to update every server manually, I have to keep track of any changes I made, and because some of my servers run branches of the project (modifications that are still being worked on, or were made for different purposes), it's a bit awkward. Until now, I've been using a "database.sql" file, which is a dump of the database structure for a specific revision. But it just seems like such a bad way to manage this. And I was wondering, how does everyone else manage their MySQL databases when they're working on a project and using Subversion?

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• Is removing unused functionality a bad thing?

  - by Andrew Grimm

  Is it possible for YAGNI to apply in the past tense? You created some functionality, it was used a little bit a while ago, but you aren't using it any more, and you don't want to maintain it, so you'd rather delete it. Is getting rid of unused or rarely-used functionality neccessarily a bad thing? Background: I use source control, so if I need the functionality again, I can get it. I'm the only user of my software (I'm a bioinformatician analyzing a data set). One scenario where I came across this was that I was using inheritance, with a parent class, and two child classes. One was handling files generated by 454 sequencing (next-generation sequencing), and the other was handling files generated by Sanger sequencing (previous-generation sequencing). I was actively maintaining the latter, but not the former. Maybe my mistake was using inheritance rather than composition, but that's a slightly different story.

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• What should I grab as a development platform, an iPod or an iPad?

  - by mmr

  Hey all, I've recently gotten into the world of contract programming, and two of my clients have indicated that they'd like to do something 'trendy', like ipod touch/iphone/ipad development. I have a mac laptop (first gen macbook pro) that I'll have to upgrade to snow leopard to do the development for any of them, from what I've read. So that's already a bit of a commitment, given all the stuff I have on that laptop I'll have to make sure is recoverable from backup. My budget is limited, but I think I need to learn this skill. Which device should I get to learn this kind of development, an iPod touch or an iPad? I don't have the money for an iPhone. I think that the iPhone/iPad SDK has an emulator mode, but I like to have the device I'm going to roll out on available to make sure that everything works as I'd expect, ie, what's easily readable on a laptop screen is still readable on the touch, etc.

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• Oracle on Mac OS X Snow Leopard

  - by Steve

  Hi, I am trying to install oracle on snow leopard using these guidelines. http://blog.rayapps.com/2009/09/14/how-to-install-oracle-database-10g-on-mac-os-x-snow-leopard/ There is a step in the installation, where I have to change netca and dbca such that it runs in 32 bit mode. Can someone please tell me how to do it. I have pasted the exact step below –Now you need to modify $ORACLE_HOME/jdk/bin/java script and change “…java -Xbootclasspath…” to “…java -d32 -Xbootclasspath…”--

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• simple python file writing question

  - by aharon

  I'm learning Python, and have run into a bit of a problem. On my OSX install of Python 3.1, this happens in the console: >>> filename = "test" >>> reader = open(filename, 'r') >>> writer = open(filename, 'w') >>> reader.read() '' >>> writer.write("hello world\n") 12 >>> reader.read() '' And calling more test in BASH confirms that there is nothing in test. What's going on? Thanks.

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• Brew install pyqt mavericks

  - by user3722876

  I have some trouble installing PyQt on my Mac. HOMEBREW_VERSION: 0.9.5 ORIGIN: https://github.com/Homebrew/homebrew.git HEAD: d8af29d63a5b94ffee863788210c3a895315035f HOMEBREW_PREFIX: /usr/local HOMEBREW_CELLAR: /usr/local/Cellar CPU: quad-core 64-bit sandybridge OS X: 10.9.3-x86_64 Xcode: 5.1.1 CLT: 5.1.0.0.1.1396320587 Clang: 5.1 build 503 MacPorts/Fink: /opt/local/bin/port X11: 2.7.6 => /opt/X11 System Ruby: 2.0.0-451 Perl: /usr/bin/perl Python: /opt/local/bin/python => /opt/local/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 Ruby: /usr/bin/ruby sip installation ok qt installation ok brew install pyqt => make 1 error generated. make[1]: *** [qtlib.o] Error 1 1 error generated. make[1]: *** [siplib.o] Error 1 make: *** [all] Error 2 No idea what's happening...

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• How can I put text from a multi-line text box into one string?

  - by Kevin van Zanten

  Dear reader, I'm faced with a bit of an issue. The scenario is that I have a multi-line text box and I want to put all that text into one single string, without any new lines in it. This is what I have at the moment: string[] values = tbxValueList.Text.Split('\n'); foreach (string value in values) { if (value != "" && value != " " && value != null && value != "|") { valueList += value; } } The problem is that no matter what I try and what I do, there is always a new line (at least I think?) in my string, so instead of getting: "valuevaluevalue" I get: "value value value". I've even tried to replace with string.Replace and regex.Replace, but alas to no avail. Please advise. Yours sincerely, Kevin van Zanten

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• Choosing between YUI Charts or Google Visualization API

  - by r2b2

  Hello , I'm a bit stuck with which charting library I will use in my project. Im stuck with this two (but also open for other suggestions) For YUI Charts : Pro : - Very robust and configurable Cons : - Uses flash 9 , which might potentially be inaccessible for users without up to date flash version - Does not support export to image (for flash versions < 10 only) For Google Visualization API pros: - small file size for the libraries, - can be exported to static image charts (via separate API call) Cons - limited configuration options So there, please help me decide. YUI charts has the edge over configuration options but Google Visualization API has the edge in terms of accessibility as it uses SVG to render the grapsh instead of Flash. For users that are hand-cuffed by corporate IT prohibitions , they cant just upgrade their Flash version and the page will not work. Thanks!

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• C: Expanding an array with malloc

  - by Mal Ock

  I'm a bit new to malloc and C in general. I wanted to know how I can, if needed, extend the size of an otherwise fixed-size array with malloc. Example: #define SIZE 1000 struct mystruct { int a; int b; char c; }; mystruct myarray[ SIZE ]; int myarrayMaxSize = SIZE; .... if ( i > myarrayMaxSize ) { // malloc another SIZE (1000) elements myarrayMaxSize += SIZE; } The above example should make clear what I want to accomplish. (By the way: I need this for an interpreter I write: Work with a fixed amount of variables and in case more are needed, just allocate them dynamically)

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• How to do a Postgresql subquery in select clause with join in from clause like SQL Server?

  - by Ricardo

  I am trying to write the following query on postgresql: select name, author_id, count(1), (select count(1) from names as n2 where n2.id = n1.id and t2.author_id = t1.author_id ) from names as n1 group by name, author_id This would certainly work on Microsft SQL Server but it does not at all on postegresql. I read its documentation a bit and it seems I could rewrite it as: select name, author_id, count(1), total from names as n1, (select count(1) as total from names as n2 where n2.id = n1.id and n2.author_id = t1.author_id ) as total group by name, author_id But that returns the following error on postegresql: "subquery in FROM cannot refer to other relations of same query level". So I'm stuck. Does anyone know how I can achieve that? Thanks

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• iphone: mechanical drawing & layers

  - by d_CFO

  I need to do a bit of mechanical drawing. I can (1) display the part’s image, [self.view addSubview:thePartAsImageView]; (2) implement two sliders (one horizontal for part’s width and one vertical for part’s height), heightSlider.transform = CGAffineTransformRotate(heightSlider.transform, 270.0/180*M_PI); (3) display the corresponding values (dimensions) as the user moves the sliders, and even (4) draw the dimensioning lines with arrowheads: CGContextAddLineToPoint What I can’t do is (5) remove those lines after I’ve drawn them. What I want is “if userTouchedTheHorizontalControl then eraseTheLinesForTheVerticalControl.” If I understand correctly – first, that Quartz composites everything to a single layer, and second, that CALayer, GeekGameBoard and so on only work on Mac -- then I have to do something different. But isn’t there something I can do other than switch to Open GL?

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• Cannot loop through Excel 2003 files in SSIS 2008

  - by Techspirit

  Hi, I am trying to execute a SSIS 2008 package on a 64-bit OS and import Excel 2003 files to SQL Server 2008. I have created an OLEDB Connection to the Excel file with a Connection String that retrieves the Excel file from a variable, inside the ForEach Loop Container. The Run64BitRunTime is set to false. I am not able to edit the SQL Command on the OLEDB Source in the Data Flow task. It returns an error : Error 2 Validation error. Load List Staged Table: Load List Staged Table: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER. The AcquireConnection method call to the connection manager "List OLEDB to Excel" failed with error code 0xC0202009. There may be error messages posted before this with more information on why the AcquireConnection method call failed. 0 0 Appreciate any help.

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• Sql Server 2008 Cross-database table linking (relationships)

  - by Alex

  Hi guys, I have a bit of an issue, and to be honest I don't think there's an answer, but I'll give it a try anyway. So I have two databases [A]-Company and [B]-Product. Both databases have a Country table which is then linked to other tables in each individual database. The problem is that the data between the two Country tables is a complete duplicate. So, I essentially have to duplicate some of the relationships in each database, and maintenance on top of that is just difficult... So, I'm curious is there a way to create a cross-database relationship between tables so I can have only one set of Country+Helper tables that govern both databases? Thanks in advance!

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