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• Hudson build defaults

  - by toluju

  This has been a fairly long-standing problem for us with our Hudson installation, and searching around the Hudson Wiki / Issue Tracker hasn't yielded any insight to this. The question: Is it possible to set certain default values for a maven2 build in Hudson? For example, we want all our projects to run the "clean" goal before a build, we want all our builds to poll the SCM hourly, and we want all our builds to deploy to our maven repository on build success. Right now, we have to manually set these setting for every project individually, which can be rather time consuming as we have 30+ different projects all being managed by Hudson. This is especially annoying if we need to change a particular setting that will affect all projects (e.g. change the repository URL). Given that I couldn't find any mention of this on the Wiki or Issue Tracker leads me to believe that I'm missing something obvious, but I cannot find an answer on my own.

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• Albacore msbuild task problem

  - by Dejan

  Just updated albacore to version 0.14 and ran into a major problem. My current environment is: Ruby 1.9.1 Rake 0.8.7 Albacore 0.1.4 The problem is that as of now all my rake build throw a funny little exception: undefined method 'push' for #<Enumerator:0x???????> So far I have traced the problem to albacore msbuild.rb line 38 and 26. To be honest I just don't have a clue why this is happening. As a little help here is the rake task that is turning my hear Grey :) desc "Build solution" msbuild :build => :prepareOutput do |msb| msb.properties :configuration => :Release msb.targets :Clean, :Build msb.solution = "../xxx/xxx/xxx.sln" end

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• Ambiguous Generic restriction T:class vs T:struct

  - by Maslow

  This code generates a compiler error that the member is already defined with the same parameter types. private T GetProperty<T>(Func<Settings, T> GetFunc) where T:class { try { return GetFunc(Properties.Settings.Default); } catch (Exception exception) { SettingReadException(this,exception); return null; } } private TNullable? GetProperty<TNullable>(Func<Settings, TNullable> GetFunc) where TNullable : struct { try { return GetFunc(Properties.Settings.Default); } catch (Exception ex) { SettingReadException(this, ex); return new Nullable<TNullable>(); } } Is there a clean work around?

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• using the data-custom="" to bind to events

  - by Dean Peterson

  I'm pretty sure I'm gonna get slammed on this. I love using the data-whatever attribute to bind events to. It feels very clean to me and helps reserve my class attribute for just styling. I know this selector is among the slowest, so I don't use it when there are a lot of elements. Would love to hear compelling arguments against this. $("body").delegate("[data-action]", "click", function(){ var action = $(this).attr("data-action"); //route action to appropriate function });

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• SVG with external images doesn't load them when embedded with <img> tag in browsers

  - by mat3001

  I made the following observation: If I create an svg image that references an external raster image via "xlink:href" and try to load the svg in browsers, the external images are only shown if I use the tag, but not when using the tag. Rendering with the tag is quite slow and not as clean as using the img tag for images so I was wondering if there's a way to make it work through the tag. At first I thought it doesn't work because of a same origin policy, but even if the referenced image is in the same directory and I reference it through its name only, it wont load. Any ideas?

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• Multi-Threading - Cleanup strategy at program end

  - by weismat

  What is the best way to finish a multi-threaded application in a clean way? I am starting several socket connections from the main thread in seperate sockets and wait until the end of my business day in the main thread and use currently System.Environment.Exit(0) to terminate it. This leads to an unhandled execption in one of the childs. Should I stop the threads from the list? I have been reluctant to implement any real stopping in the childs yet, thus I am wondering about the best practice. The sockets are all wrapped nicely with proper destructors for logging out and closing, but it still leads to errors.

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• Thread Proc for an instancable class?

  - by user146780

  Basically I have a class and it is instincable (not static). Basically I want the class to be able to generate its own threads and manage its own stuff. I don't want to make a global callback for each instance I make, this doesnt seem clean and proper to me. What is the proper way of doing what I want. If I try to pass the threadproc to CreateThread and it is the proc from a class instance the compiler says I cannot do this. What is the best way of achieving what I want? Thanks

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• Removing all Matching Classes in jQuery

  - by Seth Duncan

  Hi I have an li element that will have something along the lines of this for a declaration <li class="module ui-helper-fix"> And I can dynamically change the color of the module by adding on classes (That are provided dynamically through DB calls) the end result being <li class="module ui-helper-fix module-green"> or <li class="module ui-helper-fix module-default"> Well I am fine with changing the color by adding on a new module-WHATEVER class but what I would like to do is remove any class that matches module-XXXX so it starts with a clean slate and then add on the class module-crimson. So how do I remove all classes that match module-xxx first ? Keeping in mind I don't want to remove the base module class. Thanks. -Seth

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• Design Patterns: What's the antithesis of Front Controller?

  - by Brian Lacy

  I'm familiar with the Front Controller pattern, in which all events/requests are processed through a single centralized controller. But what would you call it when you wish to keep the various parts of an application separate at the presentation layer as well? My first thought was "Facade" but it turns out that's something entirely different. In my particular case, I'm converting an application from a sprawling procedural mess to a clean MVC architecture, but it's a long-term process -- we need to keep things separated as much as possible to facilitate a slow integration with the rest of the system. Our application is web-based, built in PHP, so for instance, we have an "index.php" and an IndexController, a "account.php" and an AccountController, a "dashboard.php" and DashboardController, and so on.

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• DataNucleus Enhancer flakey?

  - by KevMo

  I'm creating a GWT app in Google App Engine, and using Google data store. Does anybody else have the problem of the DataNucleus being flakey as all get out? I can save a class, and DataNucleus will do it's thing just fine. If I change ANYTHING in the class (even adding whitespace) and then save, I get the following error: DataNucleus Enhancer completed with success for 0 classes. Timings : input=37 ms, enhance=0 ms, total=37 ms. Consult the log for full details DataNucleus Enhancer completed and no classes were enhanced. Consult the log for full details Once I clean my project, DataNucleus is happy again. Is this common when using eclipse? Is there a workaround?

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• jqueryForm and empty uploads

  - by Aiden Bell

  Hi All, Been scratching my head for too long on this: Using jquery.form, (http://malsup.com/jquery/form) with PHP ... my $_FILES['someimage'] gets set but the error number is always UPLOAD_ERR_NO_FILE, size is also 0. The JavaScript: $('form input[type=file]').change(function(){ $(this).clone().appendTo('#imgform'); $('#imgform').ajaxForm(); $('#imgform').ajaxSubmit( { type:'POST' } ); }); Which appends to: <form id="imgform" method="POST" action="/api/images.php" enctype="multipart/form-data"></form> From another form which has bog-standard file inputs. PHP logs are clean, but var_dumping $_FILES always shows that the index is set to the name of the form element ... but no data. Thanks guys! (Sorry, I know jQuery-like questions are too frequent round these parts).

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• Need help in changing the background color of "flair"

  - by Bragaadeesh

  Hi, I am trying to include the "flair" in my website. One problem I face is that I cannot change the background color. I went to the flair page and saw that I should use the css style to change. I am very poor in CSS. I have my domain in blogger. So it would be really helpful if someone could tell me how to do it. This is what i've done which is not working <script style="background-color:grey" src="http://stackoverflow.com/users/flair/252398.js?theme=clean" type="text/javascript"></script>

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• simple div containing span won't size correctly

  - by brad

  I thought I was pretty knowledgeable about CSS but this simple problem baffles me. <div><span>sample text</span></div> results in the div's height being smaller than the height of the span if the span has padding. I realize that there are ways to use "float" to make the div size correctly, but floats always seem to introduce undesired side effects. Isn't there a clean simple way to tell the div to size to fit its contents? Seems pretty basic to me. Maybe I'm missing something.

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• Post request with body_stream and parameters

  - by Damien MATHIEU

  Hello, I'm building some kind of proxy. When I call some url in a rack application, I forward that request to an other url. The request I forward is a POST with a file and some parameters. I want to add more parameters. But the file can be quite big. So I send it with Net::HTTP#body_stream instead of Net::HTTP#body. I get my request as a Rack::Request object and I create my Net::HTTP object with that. req = Net::HTTP::Post.new(request.path_info) req.body_stream = request.body req.content_type = request.content_type req.content_length = request.content_length http = Net::HTTP.new(@host, @port) res = http.request(req) I've tried several ways to add the proxy's parameters. But it seems nothing in Net::HTTP allows to add parameters to a body_stream request, only to a body one. Is there a simpler way to proxy a rack request like that ? Or a clean way to add my parameters to my request ?

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• Releasing NSData causes exception...

  - by badmanj

  Hi, Can someone please explain why the following code causes my app to bomb? NSData *myImage = UIImagePNGRepresentation(imageView.image); : [myImage release]; If I comment out the 'release' line, the app runs... but a few times calling the function containing this code and I get a crash - I guess caused by a memory leak. Even if I comment EVERYTHING else in the function out and just leave those two lines, when the release executes, the app crashes. I'm sure this must be a newbie "you don't know how to clean up your mess properly" kind of thing ;-) Cheers, Jamie.

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• Recommendations for 'C' Project architecture guidelines?

  - by SiegeX

  Now that I got my head wrapped around the 'C' language to a point where I feel proficient enough to write clean code, I'd like to focus my attention on project architecture guidelines. I'm looking for a good resource that coves the following topics: How to create an interface that promotes code maintainability and is extensible for future upgrades. Library creation guidelines. Example, when should I consider using static vs dynamic libraries. How to properly design an ABI to cope with either one. Header files: what to partition out and when. Examples on when to use 1:1 vs 1:many .h to .c Anything you feel I missed but is important when attempting to architect a new C project. Ideally, I'd like to see some example projects ranging from small to large and see how the architecture changes depending on project size, function or customer. What resource(s) would you recommend for such topics?

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• Fabfiles With Command Line Arguments

  - by phasetwenty

  Is there a clean way to have your fabfile take command line arguments? I'm writing an installation script for a tool that I want to be able to specify an optional target directory via the command line. I wrote some code to test what would happen if I passed in some command line arguments: # fabfile.py import sys def install(): _get_options() def _get_options(): print repr(sys.argv[1:]) A couple of runs: $ fab install ['install'] Done. $ fab install --electric-boogaloo Usage: fab [options] <command>[:arg1,arg2=val2,host=foo,hosts='h1;h2',...] ... fab: error: no such option: --electric-boogaloo

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• Why am I unable to Debug my ASP.NET website in Visual Studio?

  - by willem

  I used to be able to attach to my w3wp process and Debug my web application, but this is not working anymore. I have no idea what changed to break this. My breakpoints simply have the "breakpoint will currently not be hit. The source code is different from the original version." What I have tried: Did a solution Clean. Did a solution Rebuild. Deleted the bin folder Restarted Visual Studio Restarted IIS Restarted my Computer Added a simple Response.Write to ensure that the latest DLL is being used. It is. Made sure that Debug ASP.NET is checked in my project properties. It is. Made sure that all my projects are compiled in my build configuration. They are. But none of these help. I attach to w3wp, but my breakpoints never get hit. Any ideas?

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• Restfull authentication between two GAE apps.

  - by user259349

  Hello everyone, i am trying to write a restful google app engine application (python) that accepts requests only from another GAE that i wrote. I dont like any of the ways that i thought of to get this done, please advice if you know of something better than: Get SSL setup, and simply add the credentials on the request that my consuming app will send. I dont like it cause SSL will slow things down. Security by obsecurity. Pass a long number by my consuming app that is in Xmod0, where X is a secret number that both applications know. I just,,,, dont like this. Check the HTTP header to see where is the request coming from. This option is the one that i hate the least, not alot of processing, and spoofing an HTTP request is not really worth it, for my application's data. Is there any other clean solution for this?

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• Update website with a single command (git push) instead of FTP drag and dropping

  - by Wolfr

  Situation: I have a local copy of a website I have a server that I have SSH access to What do I want to do? Commit locally until I'm happy with my code Make branches locally Have one master branch that is the one that should be pushed to the server Update the website using a single command (git push origin master) If I set up a git repo locally using git init, and then push to a folder on the server, it doesn't work. When I FTP to the server to check the files, they're actually there. When I SSH into the server and do git status, it's not clean, even though it should be since I just pushed to the server. Steps I'm doing: Make a new folder on my computer (mkdir folder_x) Go into that folder (cd folder_x) Set up a new git repository there (git init) (git repository sets up successfully) Push the repository to the server using git push origin master (where origin is set up as user:[email protected])

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• Writing String.trim() in C

  - by Phoenix

  Hi guys, I was writing the String trim method in c and this is the code I came up with. I think it does the job of eliminating leading and trailing whitespaces however, I wish the code could be cleaner. Can you suggest improvements. void trim(char *String) { int i=0;j=0; char c,lastc; while(String[i]) { c=String[i]; if(c!=' ') { String[j]=c; j++; } else if(lastc!= ' ') { String[j]=c; j++; } lastc = c; i++; } Does this code look clean ??

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• What should be done first: Code reviews or Unit tests?

  - by goldenmean

  Hello, If a developer implements code for some module and wants to get it reviewed. What should be the order : *First unit test the module after designing test cases for the module, debugging and fixing the bugs and then give the modified code for peer code review (Pros- Code to be reviewed is 'clean' to a good extent. Reduces some avoidable review comments and rework. Cons- Developer might spend large time debugging/fixing a bug which could have pointed/anticipated in peer code reviews) Or *First do the code review with peers and then go for unit testing. What are your thoughts/experience on this? I believe this approach for unit testing, code reviewing should be programming language agnostic, but it would be interesting to know otherwise(if applicable) with specific examples. -AD

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• Why can i read dirty rows in MySql

  - by acidzombie24

  I cant believe this, i always throught the below would be concurrency safe. I write to a row in one transaction and i am able to read the dirty value from another transaction/command/connection! Why is this possible (not my main question) isnt this not desired and cause more troubles!?! Anyways, i expected that once i write to a row nothing else will be able to read to the row until the transaction is finished. And at least if the row can be still read that the clean (original) value will be read. (but maybe that would cause problems as well if the transaction doesnt use the newly commited data from the other transaction when it is ran) I would like count to == 11. I thought this would be safe in all variants of sql. What can i do to either 1) Not read the dirty value but clean 2) Have that row be locked until the transaction is finished? static MySqlConnection MakeConn() { string connStr = "server=192.168.126.128;user=root;database=TestDB;port=3306;password=a;"; MySqlConnection conn = new MySqlConnection(connStr); conn.Open(); return conn; } static Semaphore sem1 = new Semaphore(1, 1); static Semaphore sem2 = new Semaphore(1, 1); static void Main2() { Console.WriteLine("Starting Test"); // sem1.WaitOne(); Console.WriteLine("1W"); sem2.WaitOne(); Console.WriteLine("2W"); Thread oThread = new Thread(new ThreadStart(fn2)); oThread.Start(); var conn = MakeConn(); var cmd = new MySqlCommand(@" CREATE TABLE IF NOT EXISTS Persons ( P_Id int NOT NULL, name varchar(255), count int, PRIMARY KEY (P_Id) )", conn); cmd.ExecuteNonQuery(); cmd.CommandText = "delete from Persons; insert into Persons(name, count) VALUES('E', '4');"; cmd.ExecuteNonQuery(); cmd.CommandText = "select count from Persons;"; var count = (int)cmd.ExecuteScalar(); Console.WriteLine("Finish inserting. v={0}", count); sem2.Release(); Console.WriteLine("2R"); sem1.WaitOne(); Console.WriteLine("1W"); Console.WriteLine("Starting transaction"); using (var tns = conn.BeginTransaction()) { cmd.CommandText = "update Persons set count=count+1"; cmd.ExecuteNonQuery(); cmd.CommandText = "select count from Persons;"; count = (int)cmd.ExecuteScalar(); Console.WriteLine("count is {0}", count); sem2.Release(); Console.WriteLine("2R"); sem1.WaitOne(); Console.WriteLine("1W"); count += 5; //10 cmd.CommandText = "update Persons set count=" + count.ToString(); cmd.ExecuteNonQuery(); cmd.CommandText = "select count from Persons;"; count = (int)cmd.ExecuteScalar(); Console.WriteLine("count is {0}", count); tns.Commit(); } Console.WriteLine("finished transaction 1"); sem2.Release(); Console.WriteLine("2R"); sem1.WaitOne(); Console.WriteLine("1W"); cmd.CommandText = "select count from Persons;"; count = (int)cmd.ExecuteScalar(); Console.WriteLine("count is {0}", count); sem2.Release(); Console.WriteLine("2R"); //sem1.WaitOne(); Console.WriteLine("1W"); } static void fn2() { int count; Console.WriteLine("Starting thread 2"); sem2.WaitOne(); Console.WriteLine("1W"); var conn = MakeConn(); var cmd = new MySqlCommand("", conn); sem1.Release(); Console.WriteLine("1R"); sem2.WaitOne(); Console.WriteLine("2W"); using (var tns = conn.BeginTransaction()) { cmd.CommandText = "update Persons set count=count+1"; cmd.ExecuteNonQuery(); cmd.CommandText = "select count from Persons;"; count = (int)cmd.ExecuteScalar(); Console.WriteLine("count is {0}", count); sem1.Release(); Console.WriteLine("1R"); sem2.WaitOne(); Console.WriteLine("2W"); tns.Commit(); } Console.WriteLine("finished transaction 2"); sem1.Release(); Console.WriteLine("1R"); sem2.WaitOne(); Console.WriteLine("2W"); cmd.CommandText = "select count from Persons;"; count = (int)cmd.ExecuteScalar(); Console.WriteLine("count is {0}", count); //should be 11. 4 + 1x2(one each thread) += 5 from first thread == 11 sem1.Release(); Console.WriteLine("1R"); } console Starting Test 1W 2W Starting thread 2 Finish inserting. v=4 2R 1W 1R 1W Starting transaction count is 5 2R 2W count is 6 1R 1W count is 10 finished transaction 1 2R 2W finished transaction 2 1R 1W count is 10 2R 2W count is 10 1R

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• Implement Exception Handling in ASP.NET C# Project

  - by Shrewd Demon

  hi, I have an application that has many tiers. as in, i have... Presentation Layer (PL) - contains all the html My Codes Layer (CL) - has all my code Entity Layer (EL) - has all the container entities Business Logic Layer (BLL) - has the necessary business logic Data Logic Layer (DLL) - any logic against data Data Access Layer (DAL) - one that accesses data from the database Now i want to provide error handling in my DLL since it is responsible for executing statement like ExecureScalar and all.... And i am confused as to how to go about it...i mean do i catch the error in the DLL and throw it back to the BLL and from there throw it back to my code or what.... can any one please help me how do i implement a clean and easy error handling techinque help you be really appreciated. Thank you.

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• insertNewObjectForEntityForName:inManagedObjectContext: returning NSNumber bug?

  - by beinstein

  I'm relatively well versed in CoreData and have been using it for several years with little or no difficulty. For the life of me, I can't figure out why insertNewObjectForEntityForName:inManagedObjectContext: is all of a sudden returning some sort of strange instance of NSNumber. GDB says the returned object is of the correct custom subclass of NSManagedObject, but when I go to print a description of the NSManagedObject itself, I get the following error: *** -[NSCFNumber objectID]: unrecognized selector sent to instance 0x3f26f50 What's even stranger, is that I'm able to set some relationships and attributes using setValue:forKey: and all is good. But when I try to set one specific relationship, I get this error: *** -[NSCFNumber entity]: unrecognized selector sent to instance 0x3f26f50 I've tried everything from clean all targets, to restarting both mac and iPhone, even editing the model so that the relationship in question is to-one instead of to-many. No matter what I do, the same problem appears. Has anyone ever seen anything like this before?

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