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• What is the difference in WCF when using KnownType and ServiceKnownType?

  - by Paul Speranza

  I have a service that returns an array of animal but the list can contain cats, dogs, etc, which all extend animal. I know I need to use either the KnownType or ServiceKnownType attribute, and on the entity class or the service class, respectively. What is the difference between the 2 attributes? I prefer the ServiceKnownType because it is applied on the service, exactly where it is needed and called for, as opposed to KnownType which is applied on my entity. To me applying it on the entity class means knowing too far ahead how my entity class is being used. For now I have it on my entity and it works like a charm, but I am looking for guidance here as to best practices and usefullness. Thanks, Paul Speranza

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• Remove favicon using javascript in Google Chrome

  - by Cyclone

  How can you remove the favicon using Javascript in google chrome? The goal is to return it to the browser default, which is in this case a blank image. I found this question, but it doesn't work if you leave the link.href attribute as empty. Even if the favicon is set because there is a favicon.ico file on the server, I'd like to remove it and set it back to the default. This only needs to work in chrome. Thanks!

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• F# List of functions

  - by akaphenom

  I am trying to have a list of functions, but seem to be comming up empty handed. The basic code is something like this: let doSomething var = var let doSomething2 var = var let listOfStuff = [doSomething doSomething2] and I am getting the followiung exception: Error 2 Value restriction. The value 'listOfStuff' has been inferred to have generic type val queue : ('_a - '_a) list Either define 'queue' as a simple data term, make it a function with explicit arguments or, if you do not intend for it to be generic, add a type annotation. C:\fsharp\SentimentFramework\TradeSignalProcessor\Program.fs 16 9 TradeSignalProcessor I tried addin the [] attribute but that didn't work...

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• Error about 'invalid JSON' with couchDB view but the json's fine...

  - by Chris Huang-Leaver

  I am trying to setup the following view on CouchDB { "_id":"_design/id", "_rev":"1-9be2e55e05ac368da3047841f301203d", "language":"javascript", "views":{ "by_id":{ "map" : "function(doc) { emit(doc.id, doc)}" },"from_user_id":{ "map" : "function(doc) { if (doc.from_user_id) {emit(doc.from_user_id, doc)}}"}, "from_user":{ "map" : "function(doc) { if (doc.from_user) {emit(doc.from_user, doc)}}"}, "to_user_id":{ "map" : "function(doc) {if (doc.to_user_id){ emit(doc.to_user_id, doc)}}"}, "to_user":{ "map" : "function(doc) {if (doc.to_user){ emit(doc.to_user, doc)}}" }, "max_id":{ "map" : "function(doc) { if (doc.id) {emit(doc._id, eval(doc.id))}}", "reduce" :"function(key,value) { a = value[0]; for (i=1; i <value.length; ++i){a = Math.max(a,value[i])} return a}" } } } when I try to 'PUT' this using curl: curl -X PUT -d keys.json $CDB/_design/id {"error":"bad_request","reason":"invalid UTF-8 JSON"} I know it's not invalid JSON, because I tested it using the 'json' library built into Python 2.6, it loads fine. JS screw ups give me the error 'must evaluate to a function' What else might be wrong with it?

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• Convert byte array from Oracle RAW to System.Guid?

  - by Cory McCarty

  My app interacts with both Oracle and SQL Server databases using a custom data access layer written in ADO.NET using DataReaders. Right now I'm having a problem with the conversion between GUIDs (which we use for primary keys) and the Oracle RAW datatype. Inserts into oracle are fine (I just use the ToByteArray() method on System.Guid). The problem is converting back to System.Guid when I load records from the database. Currently, I'm using the byte array I get from ADO.NET to pass into the constructor for System.Guid. This appears to be working, but the Guids that appear in the database do not correspond to the Guids I'm generating in this manner. I can't change the database schema or the query (since it's reused for SQL Server). I need code to convert the byte array from Oracle into the correct Guid.

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• why does absolute paths of images gets converted to cid?

  - by David Verhulst

  I've got mailings that need to be sended using cron. When I load the script manualy all works fine. With cron i get broken images. to change the src of my img i used: $body = eregi_replace("managersrc_logo","images/managers/acertainlogo.jpg",$body); Because i thaught that it is importent to use absolute paths i also tried: $body = eregi_replace("managersrc_logo","http://www.site.com/images/managers/acertainlogo.jpg",$body); In that case i even do not see the images when i run the cronscript manualy. Nor the automated cron will display me the images. When i check the source of the mail that is received i always see "cid:encryptedstuff" even if i use absolute paths? Why is that? I just want my absolute paths being printed in the src attribute of the img tag. Who changes my absolute path to cid: ? is it php, phpmailer or outlook itself? Any help someone?.... David

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• OpenLDAP and user role based accedss controll (RBAC)

  - by Jason

  Hello, my company uses an openldap server which stores corporate user information ((username,passwd and some other information like email are stored in ldap).. Till now they only use it for authentication but now we'd like to use for authentication also, this means that we'll create roles (as ldap attributes in a new schema) and assign those roles in the users. My actual question is if there is a best-practice to follow for using openldap for authentication on many applications (most written in php). I understand how to make roles and assign them to users for just one application, but what about the others (each application of course has its own roles). Should I just create an ou=appName,ou=roles,dc=mycompany for each application, put the roles as attributes there and just add each role as an attribute of the user object ? is there any other recommendations ? thanks

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• Rails - Help with rake task

  - by jyoseph

  I have a rake task I need to run in order to sanitize (remove forward slashes) some data in the database. Here's the task: namespace :db do desc "Remove slashes from old-style URLs" task :substitute_slashes => :environment do puts "Starting" contents = Content.all contents.each do |c| if c.permalink != nil c.permalink.gsub!("/","") c.save! end end puts "Finished" end end Which allows me to run rake db:substitute_slashes --trace If I do puts c.permalink after the gsub! I can see it's setting the attribute properly. However the save! doesn't seem to be working because the data is not changed. Can someone spot what the issue may be? Another thing, I have paperclip installed and this task is triggering [paperclip] Saving attachments. which I would rather avoid.

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• [UIScreen applicationFrame] returning incorrect rectangle on landscape application launch (iPhone/iP

  - by jbrennan

  Having trouble getting the correct bounds for my iPad application when launching it in landscape mode. I have the proper keys set in my Info.plist file, and my view controllers launch properly in landscape (and portrait, natch). In my applicationDidFinishLaunching: method I'm calling a selector after a 3 second delay, and that method makes a call to [[UIScreen applicationFrame]`, but it's returning me a portrait frame (ie height width). Does anyone know how to fix this? It smells like a bug to me (if so I'll file a radar), but if it's intended behaviour, where is it documented?

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• Where is PostSharp.Public 1.5 DLL ?

  - by jfneis

  Fellows, I'm going crazy with looks like a really stupid problem. I'm trying to build a simple example using PostSharp as a log AOP utility. I've not installed PostSharp, and I don't want to, I want to reference the necessaries DLLs, change my .csproj and see everything working. Change the project and add references was kind of easy, byt just after adding the LogAttribute to a method I got two errors: Error 1 'Log4PostSharp.LogAttribute' is not an attribute class C:\Dev\LogWithPostsharp\LogWithPostsharpCmd\Program.cs 17 10 LogWithPostsharpCmd Error 2 The type 'PostSharp.Extensibility.MulticastAttribute' is defined in an assembly that is not referenced. You must add a reference to assembly 'PostSharp.Public, Version=1.5.0.0, Culture=neutral, PublicKeyToken=b13fd38b8f9c99d7'. C:\Dev\LogWithPostsharp\LogWithPostsharpCmd\Program.cs 18 22 LogWithPostsharpCmd The first error really looks like consequence of the second, but here is the deal: the PostSharp.Public.* simply doesn't exist in the downloaded .zip. Is there something that I'm not getting? Thank you in advance. Filipe

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• Circular reference error when outputting LINQ to SQL entities with relationships as JSON in an ASP.N

  - by roosteronacid

  Here's a design-view screenshot of my dbml-file. The relationships are auto-generated by foreign keys on the tables. When I try to serialize a query-result into JSON I get a circular reference error..: public ActionResult Index() { return Json(new DataContext().Ingredients.Select(i => i)); } But if I create my own collection of "bare" Ingredient objects, everything works fine..: public ActionResult Index() { return Json(new Entities.Ingredient[] { new Entities.Ingredient(), new Entities.Ingredient(), new Entities.Ingredient() }); } ... Also; serialization works fine if I remove the relationships on my tables. How can I serialize objects with relationships, without having to turn to a 3rd-party library? I am perfectly fine with just serializing the "top-level" objects of a given collection.. That is; without the relationships being serialized as well.

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• Why is WPFToolkit DataGrid so slow when binding?

  - by Schneider

  I have a very simple test application where I have two objects, each with a small collection of items. when I select an object I display its collection in a WPFToolkit DataGrid. The problem is there is a noticeable delay, such that if you press up/down keys to toggle selection between objects you can see it can't keep up. Why is the performance so bad? <Window x:Class="SlowGridBinding.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:Controls="clr-namespace:Microsoft.Windows.Controls;assembly=WPFToolkit" Title="MainWindow" Height="350" Width="525"> <StackPanel> <ListBox ItemsSource="{Binding Shops}" DisplayMemberPath="Name" IsSynchronizedWithCurrentItem="True"/> <Controls:DataGrid ItemsSource="{Binding Shops/Vegetables}" AutoGenerateColumns="True"/> </StackPanel> The DataContext is populated with some test classes filled with 50 items of random test data.

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• Python Image Library: How to combine 4 images into a 2 x 2 grid?

  - by Casey

  I have 4 directories with images for an animation. I would like to take the set of images and generate a single image with the 4 images arranged into a 2x2 grid for each frame of the animation. My code so far is: import Image fluid64 = "Fluid64_half_size/00" fluid128 = "Fluid128_half_size/00" fluid512 = "Fluid512_half_size/00" fluid1024 = "Fluid1024_half_size/00" out_image = "Fluid_all/00" for pic in range(1, 26): blank_image = Image.open("blank.jpg") if pic < 10: image_num = "0"+str(pic) else: image_num = str(pic) image64 = Image.open(fluid64+image_num+".jpg") image128 = Image.open(fluid128+image_num+".jpg") image512 = Image.open(fluid512+image_num+".jpg") image1024 = Image.open(fluid1024+image_num+".jpg") out = out_image + image_num + ".jpg" blank_image.paste(image64, (0,0)).paste(fluid128, (400,0)).paste(fluid512, (0,300)).paste(fluid1024, (400,300)).save(out) Not sure why it's not working. I'm getting the error: Traceback (most recent call last): File "C:\Users\Casey\Desktop\Image_composite.py", line 24, in <module> blank_image.paste(image64, (0,0)).paste(fluid128, (400,0)).paste(fluid512, ( ste(fluid1024, (400,300)).save(out) AttributeError: 'NoneType' object has no attribute 'paste' shell returned 1 Any help would be awesome. Thanks!

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• append a numpy array to a numpy array

  - by Fraz

  I just started programming in python and am very new to numpy packages.. so still trying to get a hang of it. I have a an numpy_array so something like [ a b c] And then I want to append it into anotehr numpyarray (Just like we create a list of lists) How do we create an array of numpy arrays containing numpy arrays I tried to do the following without any luck >>> M = np.array([]) >>> M array([], dtype=float64) >>> M.append(a,axis=0) Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'numpy.ndarray' object has no attribute 'append' >>> a array([1, 2, 3])

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• Schema compare with MS Data Tools in VS2008

  - by rdkleine

  When performing a schema compare having db_owner rights on the target database results in the following error: The user does not have permission to perform this action. Using the SQL Server Profiler I figured out this error occurs executing a query targeting the master db view: [sys].[dm_database_encryption_keys] While specifically ignoring all object types but Tables one would presume the SQL Compare doesn't need access to the db encryption keys. Also note: http://social.msdn.microsoft.com/Forums/en-US/vstsdb/thread/c11a5f8a-b9cc-454f-ba77-e1c69141d64b/ One solution would be to GRANT VIEW SERVER STATE to the db user, but in my case I'm not hosting the database services and won't get the rights to the server state. Also tried excluding DatabaseEncryptionKey element in the compare file. <PropertyElementName> <Name>Microsoft.Data.Schema.Sql.SchemaModel.SqlServer.ISql100DatabaseEncryptionKey</Name> <Value>ExcludedType</Value> </PropertyElementName> Anyone has an workaround this?

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• Avoiding unsafe cast for generic situation involving runtime passing of class

  - by Bart van Heukelom

  public class AutoKeyMap<K,V> { public interface KeyGenerator<K> { public K generate(); } private KeyGenerator<K> generator; public AutoKeyMap(Class<K> keyType) { // WARNING: Unchecked cast from AutoKeyMap.IntKeyGen to AutoKeyMap.KeyGenerator<K> if (keyType == Integer.class) generator = (KeyGenerator<K>) new IntKeyGen(); else throw new RuntimeException("Cannot generate keys for " + keyType); } public void put(V value) { K key = generator.generate(); ... } private static class IntKeyGen implements KeyGenerator<Integer> { private final AtomicInteger ai = new AtomicInteger(1); @Override public Integer generate() { return ai.getAndIncrement(); } } } In the code sample above, what is the correct way to prevent the given warning, without adding a @SuppressWarnings, if any?

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• tablesorter pager initial pagination

  - by vikitor

  Hi, This might sound like a very stupid question to some of you, but I assure you I've been checking through the internet and I haven't had any luck about this. My question is: is it possible to set an initial pagination number in the tablesorter pager plugin? By default it takes the 10 option, but I've tried to put a 5 as the selected option and it loads 10 anyway. If I change it and come back to the 5 it will load as said, 5, but not at the beggining. Is there any option when loading the tablesorter? My code for the tablesorter is this: $("#TST").tablesorter({ headers: { 0: { sorter: false }, 4: { sorter: false }, 5: { sorter: false }, 6: { sorter: false} }, sortList: [[1, 0], [2, 0], [3, 0]], widgets: ['zebra'] }) .tablesorterPager({ container: $("#TSTPager"), positionFixed: false //, //pagesize: 5 }); the pagesize attribute I wrote in the tablesorterPager was a test, but it doesn't do what I want it to.

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• Developing Installer Packages, are Visual Studio Setup Projects suitable for complex setups

  - by Robert

  Are "Visual Studio Setup" Projects suitable for complex setups in different versions? The application is rather large ( 500.000 lines of code) and is under continuous development. Every 6 to 10 month a new version gets released. We have multiple configuration files (INI and XML), registry keys, database migration scripts, etc. The application is in the progress of being migrated from VB6 to .NET . The old installer was build with Installshield. The feedback to Installshield is: Bad adaptability, bad reuse - thats way we are evaluating "Visual Studio Setup" as an alternative. Other products we consider: Free Solutions WiX NSIS Commercial Solutions Installshield (again..) Wise Advanced Installer sth. missing? Solutions we don't like to consider: Inno Setup (It just doesn't feel right)

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• Best Geocoding Service for iPhone Developers

  - by ckrames1234

  I have made an app that gets an array of addresses from a web service and I want to map them. I know Apple left this out in MapKit, including only a reverse GeoCoder. I was wondering what the best way to approach this problem was. Web Service? Google Maps API (How do API keys work?)? CloudMade? What is your opinions on which service is fastest, easiest to use, and cheapest (hopefully free)? Thanks, Conrad Kramer

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• Coldfusion 8: Array of structs to struct of structs

  - by davidosomething

  I've got an array items[] Each item in items[] is a struct. item has keys id, date, value (i.e., item.id, item.date, item.value) I want to use StructSort to sort the item collection by a date Is this the best way to do it in ColdFusion 8: <cfset allStructs = StructNew()> <cfloop array = #items# index = "item"> <cfset allStructs[item.id] = item> <cfset unixtime = DateDiff("s", CreateDate(1970,1,1), item.date)> <cfset allStructs[item.id].unixtime = unixtime> </cfloop> <cfset allStructs = StructSort(allStructs, "numeric", "desc", "unixtime")> It's going to be dreadfully slow

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• Using the Ninject NLogModule Logger in global.asax

  - by Ciaran

  I'm using Ninject for DI in my asp.net application, so my Global class inherits from NinjectHttpApplication. In my CreateKernel(), I'm creating my custom modules and DI is working fine for me. However, I notice that there is a Logger property in the NinjectHttpApplication class, so I'm trying to use this in Application_Error whenever an exception is not caught. I think I'm creating the nlog module correctly for Ninject, but my logger is always null. Here's my CreateKernel: protected override Ninject.Core.IKernel CreateKernel() { IKernel kernel = new StandardKernel(new NLogModule(), new NinjectRepositoryModule()); return kernel; } But in the following method, Logger is always null. protected void Application_Error(object sender, EventArgs e) { Exception lastException = Server.GetLastError().GetBaseException(); Logger.Error(lastException, "An exception was caught in Global.asax"); } To clarify, Logger is a property on NinjectHttpApplication of type ILogger and has the [Inject] attribute Any idea how to inject correctly into Logger?

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• Specifying culture for http request/reponse

  - by Akash

  I have a ReSTful web service which needs to parse culture-sensitive data from the request. This data could either be in an XML body or part of the query string. Is there any acepted way of determining which culture the data is being sent in (and by extension the culture in which the response should be sent)? One option is simply to specify to the clients the culture in which all requests should be sent. A friendlier option seems to be to allow the client to specify the culture. I've considered: a) using the accept-language http header to encode this information. b) using the xml:lang attribute for XML POSTs, and an extra field for query strings (e.g. ...&culture=en-GB) http://www.w3.org/International/questions/qa-accept-lang-locales warns of limitations in using the accept-language header, but most of the warnings seem to center around requests originating from browsers. In my case the requests will come from other applications. All advice greatly appreciated!

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• Can I use a class as an object in C# to create instances of that class?

  - by Troy

  I'm writing a fairly uncomplicated program which can "connect" to several different types of data sources including text files and various databases. I've decided to implement each of these connection types as a class inherited from an interface I called iConnection. So, for example, I have TextConnection, MySQLConnection, &c... as classes. In another static class I've got a dictionary with human-readable names for these connections as keys. For the value of each dictionary entry, I want the class itself. That way, I can do things like: newConnection = new dict[connectionTypeString](); Is there a way to do something like this? I'm fairly new to C# so I'd appreciate any help.

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• how do you use ${word_selection} in an Eclipse PDT template?

  - by pocketfullofcheese

  I was recently trying to use some code templates with Eclipse PDT 2.1 to speed up some common tasks. We use a lot of getters/setters, so I wrote the following template. function get${word_selection}() { return $$this->getData('${word_selection}'); } function set${word_selection}($$${word_selection}) { $$this->setData('${word_selection}', $$${word_selection}); } I named the template "getset" and the only way I know to use the Code Assist is to type: "getset" then hit my code assist keys (I have it set to Esc, but I think the default was Ctrl+Space). The problem is, this doesn't actually let me select a word to be used by the ${word_selection}. My question is: how do I type in my template name, hit the key combo, and have a word selected all at the same time?

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• Listview navigation behaviour in an xbap versus a standalone app

  - by J W

  Hello, I have an wpf application which contains a listview. When the application runs as a standalone I can navigate through the list with the arrow up and the arrow down keys on the keyboard. When the application is deployed as an XBAP and runs in a browser window I can do this too but when I for example reach the top element and press the up arrow key one more time the focus jumps to the url bar in the browser. Does anyone know if there’s an easy way to prevent this? Thanks.

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