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• FSharp.Compiler.CodeDom for VS2008 and VS2010 side-by-side

  - by SztupY

  I'm using FSharp.Compiler.CodeDom to dynamically create F# classes. The problem is, that I have both VS2008 and VS2010 on my computer side-by-side (they works fine), and using F# in this configuration is buggy at best: If I don't install InstallFSharp.msi, then under VS2008 the built classes complain about not finding FSharp.Core (even if they're referenced) If I install InstallFSharp.msi, then under VS2008 the built classes will use the F# built for VS2010, and will throw a binary-incompatibility exception, because it will load the .net4 variant: FSC: error FS0219: The referenced or default base CLI library 'mscorlib' is binary- incompatible with the referenced F# core library 'C:\Program Files (x86)\Microsoft F#\v4.0\FSharp.Core.dll'. Consider recompiling the library or making an explicit reference to a version of this library that matches the CLI version you are using. If I replace the F# found at the previous location to the separately installed dll-s, then of course VS2010 will complain about binary-incompatibility Am I overlooking something, or they won't simply work for a shared environment like this? This might mean real problems when I deploy the applications. Thanks

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• Excel get_Range missing when interop assembly is embedded in .NET 4.0

  - by mikemay

  I build an assembly referencing a COM interop DLL. If I embed the COM interop types by setting Embed Interop Types to True in the Reference's properties (VS2010), at run-time an error occurs "object does not contain a definition for get_Range". If COM interop types are not embedded then no error occurs. Does anyone know why a particular method, Worksheet.get_Range should be ommitted or how to work around this or have any other relevant insights? I should be grateful for any help. The interop dll contains a reference to Worksheet.get_Range(object, [object]). Using reflector on my calling assembly there is no mention of get_Range under Worksheet. The interop assembly I am embedding is generated from Excel9.olb. I am not using PIAs as the application targets multiple Excel versions.

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• WSDL Object model

  - by Swaroop

  I'm using the WSDL object model (WOM) along with XSOM for a project of mine. The WOM gives me a way to drill down and look at messages and the message types which are element declarations. However, I am unable to find a way to parse the simple and complex types. The APIs are tricky. There seems to be some kind of a connection between WOM and XSOM. I'd really appreciate it if you could tell me how I can parse the simple and the complex types in my .wsdl file.

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• Higher-order type constructors and functors in Ocaml

  - by sdcvvc

  Can the following polymorphic functions let id x = x;; let compose f g x = f (g x);; let rec fix f = f (fix f);; (*laziness aside*) be written for types/type constructors or modules/functors? I tried type 'x id = Id of 'x;; type 'f 'g 'x compose = Compose of ('f ('g 'x));; type 'f fix = Fix of ('f (Fix 'f));; for types but it doesn't work. Here's a Haskell version for types: data Id x = Id x data Compose f g x = Compose (f (g x)) data Fix f = Fix (f (Fix f)) -- examples: l = Compose [Just 'a'] :: Compose [] Maybe Char type Natural = Fix Maybe -- natural numbers are fixpoint of Maybe n = Fix (Just (Fix (Just (Fix Nothing)))) :: Natural -- n is 2 -- up to isomorphism composition of identity and f is f: iso :: Compose Id f x -> f x iso (Compose (Id a)) = a

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• Scheme: Detecting duplicate elements in a list

  - by Kyle Krull

  Does R6RS or Chez Scheme v7.9.4 have a library function to check if a list contains duplicate elements? Alternatively, do either have any built in functionality for sets (which dis-allow duplicate elements)? So far, I've only been able to find an example here. The problem with that is that it doesn't appear to actually be part of the Chez Scheme library. Although I could write my own version of this, I'd much rather use a well known, tested, and maintained library function - especially given how basic an operation this is. So a simple "use these built-in functions" or a "no built-in library implements this" will suffice. Thanks!

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• ASP.NET MVC and ASP.NET membership template provider

  - by rem

  In a standard ASP.NET MVC template application that is created by default in Visual Studio when starting a new ASP.NET MVC application there is already a built-in membership / authentication / authorization system. Using web search one can find lots of info about how to work with a built-in ASP.NET membership system, but very often this material is a bit of an old and refer to ASP.NET only, not mentioning ASP.NET MVC framework. Just for example: http://msdn.microsoft.com/en-us/library/ms998347.aspx#paght000022%5Fmembershipapis or http://www.4guysfromrolla.com/articles/091207-1.aspx To what extent all that applies to ASP.NET built-in membership system applies also to ASP.NET MVC ready template membership system?

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• How to perform insert and update with Ado.net dataservices (EF and Inheritance)

  - by Thurein

  Hi, I have an entity model, in which I have a table per type inheritance. There are 3 types, first, Contact, which I defined as abstract in my EF model and the rest are Company and person types which are derived from contact type. Is it possible to perform an insert using ado.net dataservice and asp.net ajax library? I was trying the following client code : dataContext.insertEntity(person, "Contacts"); I was getting this response from server : Error processing request stream. Type information must be specified for types that take part in inheritance. Thanks.

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• wsimport and header params for logging

  - by Milan

  I have this situation. Generating form based on the WSDL. I made it but I came to the situation when the wsimport tool generates classes with methods with params for header(for authentication) and the params are not just simple types. But some complex. The problem is that I dont know which classes will be generated so I need simple types for the methods. @WebMethod(operationName = "DNSLookup", action = "http://www.strikeiron.com/DNSLookup") @WebResult(name = "DNSLookupResult", targetNamespace = "http://www.strikeiron.com") @RequestWrapper(localName = "DNSLookup", targetNamespace = "http://www.strikeiron.com", className = "invoker.DNSLookup") @ResponseWrapper(localName = "DNSLookupResponse", targetNamespace = "http://www.strikeiron.com", className = "invoker.DNSLookupResponse") public SIWsOutputOfDNSInfo dnsLookup( @WebParam(name = "HostNameOrIPAddress", targetNamespace = "http://www.strikeiron.com") String hostNameOrIPAddress, @WebParam(name = "LicenseInfo", targetNamespace = "http://ws.strikeiron.com", header = true, partName = "LicenseInfo") LicenseInfo licenseInfo, @WebParam(name = "SubscriptionInfo", targetNamespace = "http://ws.strikeiron.com", header = true, mode = WebParam.Mode.OUT, partName = "SubscriptionInfo") Holder<SubscriptionInfo> subscriptionInfo); you can see that LicenseInfo licenseInfo, and Holder subscriptionInfo);? Is it possible to somehow to specify to have simple types for header params?

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• Generating new sources via Maven plugin after compile phase

  - by japher

  I have a Maven project within which I need execute two code generation steps. One generates some Java types, then the second depends on those Java types to generate some more code. Is there a way to have both of these steps happening during my build? At the moment my steps are: execute first code generation plugin (during generate-sources) add directory of generated types to build path execute second code generation plugin (during compile) However my problem is that anything generated by the second code generation plugin will not be compiled (because the compile phase has finished). If I attach the second code generation plugin to an earlier phase, it fails because it needs the classes from the first code generation plugin to be present on the classpath. I know I could split this into two modules with one dependent on the other, but I was wondering if this could be achieved in one pom. It seems like a need a way to invoke compile again after the normal compile phase is complete. Any ideas?

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• When should you NOT use the asterisk (*) when declaring a variable in Objective C

  - by Jason

  I have just started learning objective c and the asterisk is giving me some trouble. As I look through sample code, sometime it is used when declaring a variable and sometimes it is not. What are the "rules" for when it should be used. I thought it had something to do with the data type of the variable. (asterisk needed for object data types, not needed for simple data types like int) However, I have seen object data types such as CGPoint declared without the asterisk as well? Is there a definitive answer or does it have to do with how and what you use the variable for?

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• How do I get google guice to inject a custom logger, say a commons-logging or log4j logger

  - by Miguel Silva

  Google guice has a built-in logger binding (http://code.google.com/p/google-guice/wiki/BuiltInBindings). But what if I want to use a commons-logging or log4j logger? Can I get guice to inject a Log created by LogFactory.getLog(CLASS.class) But having the same behavior as in built-in binding: The binding automatically sets the logger's name to the name of the class into which the Logger is being injected.. Does it even makes sense? Or shout I simply use the built-in java Logger? Or just use commons-logging without injections?

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• php selecting hash using wildcards

  - by tipu

  Say I have a hashmap, $hash = array('fox' => 'some value', 'fort' => 'some value 2', 'fork' => 'some value again); I am trying to accomplish an autocomplete feature. When the user types 'fo', I would like to retrieve, via ajax, the 3 keys from $hash. When the user types 'for', I would like to only retrieve the keys fort and fork. Is this possible? What I was thinking was using binary search to isolate the keys with 'f', instead of brute-force searching. Then continue eliminating the indexes as the user types out their query. Is there a more efficient solution to this?

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• Java variadic function parameters

  - by Amir Rachum

  Hi, I have a function that accepts a variable number of parameters: foo (Class... types); In which I get a certain number of class types. Next, I want to have a function bar( ?? ) That will accepts a variable number of parameters as well, and be able to verify that the variables are the same number (that's easy) and of the same types (the hard part) as was specified in foo. How can I do that? Edit: to clarify, a call could be: foo (String.class, Int.class); bar ("aaa", 32); // OK! bar (3); // ERROR! bar ("aa" , "bb"); //ERROR! Also, foo and bar are methods of the same class.

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• Optimizing if-else /switch-case with string options

  - by cc

  What modification would bring to this piece of code? In the last lines, should I use more if-else structures, instead of "if-if-if" if (action.equals("opt1")) { //something } else { if (action.equals("opt2")) { //something } else { if ((action.equals("opt3")) || (action.equals("opt4"))) { //something } if (action.equals("opt5")) { //something } if (action.equals("opt6")) { //something } } } Later Edit: This is Java. I don't think that switch-case structure will work with Strings. Later Edit 2: A switch works with the byte, short, char, and int primitive data types. It also works with enumerated types (discussed in Classes and Inheritance) and a few special classes that "wrap" certain primitive types: Character, Byte, Short, and Integer (discussed in Simple Data Objects ).

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• Uploadify refuses to upload WMV, FLV and MP4 files

  - by Jon Winstanley

  The uploadify plugin for JQuery seems very good and works for most file types. However, it allows me to upload all file types apart from the ones I need! Namely .WMV, .FLV and .MP4 I have googled the issue and not found anyonw having such difficulties. I have already tried changing the fileExt parameter and also tried removing it altogether. I have testing in Google Chrome, IE7 and Firefox and none work for thes efile types. Is there a known reason for this behaviour?

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• Use of serialization in JMX calls on Websphere Appserver to avoid ClasscastException

  - by hstoerr

  We are using JMX for communication between different EARs on the same Websphere application server (6.1). All works well if we only use Java types as arguments, but if we use or own the problem is that we get ClassCastExceptions on the receiver side. This is obviously a classloader problem: if the jar with the argument types is put into the JRE endorsed directory, such that all classloaders use exactly the same class, the Exception disappear. But we would much prefer to put the library that defines the argument types in the EAR itself. Now my question: is there a trick to persuade WAS to serialize and deserialize the arguments during the JMX call? I guess in this case the ClassCastException would dissappear.

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• Parse Complex WSDL Parameter Information in C#

  - by jaws

  I am attempting to parse WSDL, along the lines of the example given here. The author notes, in the comments, that the example is not capable of drilling down into complex data types. And in fact, when I run the example, it does not appear to even handle simple data types. I have poked around in System.Web.Services.Description.ServiceDescription class, which is used in the example, but cannot find any actual parameter or return type information at run-time. I gather that I may need to do some manual parsing of an xsd file? Both google and stackoverflow appear to lack a complete example of how to drill down into complex types programmatically, so... how should I do this?

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• Wordpress Video Portal

  - by choise

  Hi out there, my challenge is to built a video portal, based on wordpress (blog already started). so in the backend there must be a option to add, tag, descripe videos and in frontend the videos must have a comment function, must be searchable and so on. wordpress gives already a large amout of functionallity and i want to use this, comments for example, but also categorisation and tagging. what is the best practise to built such a "plugin" ? where to start? what to use? custom tables and built everything by myself or can i use the blog functionallity to advantage? hopefully everything is clear, comment if not ;)

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• ZipArchive php Class - Does it support all servers?

  - by SoLoGHoST

  Ok, just wondering on the versions of PHP that this class is built into. And if they are built into all platforms (OS's). I'm wanting an approach to search through a zip file and place files using file_put_contents in different filepaths within the webroot. In any case, I'm familiar with how to do this with the ZipArchive class, but I'm wondering if using this class would be a good solution and support MOST, if not ALL servers?? I mean, I'd rather not use a method that requires the Server to have it installed. I'm looking for a solution to this that will support at least MOST servers without having to install the class... Thanks :) Also, I'd like to support opening tar.gz and/or .tgz files if possible, but I don't think the ZipArchive class supports this, but perhaps a different built-in php class does??

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• Dissapearing object function??

  - by WmasterJ

  Is there a reason for object functions to be unset or deleted or simply not applied for any reason at all that isn't intentional? I am maintaining someone elses code and gone through it many times. I use Google Chromes awesome debuger and also TextMate. These help me find the origin of error relatively fast. The problem I have now is that i have an object: types. This object conatains...types. And these types have functions and other variables attached to them. For some reason in the middle of the code, this type has been passed by reference millions of times probably. When it comes to a certain part of the code parts of it, seem to have dissapeared. Puff! And it's gone..! Anyone have a clue (other than it being removed somewhere else earlier in the code, I'm already looking for that)

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• Web setup project removes files after upgrade from VS2008 to VS2010

  - by Craig Shearer

  I have a web setup project built using VS2008. I've converted my solution to VS2010 and now when I build my new installer and run the install from the MSI it installs fine, then at the last step, removes all the files it's just installed. I have RemovePreviousVersions set to true. If I turn this off the files remain in place (but I get multiple instances in the Programs and Features in the control panel). If I run the install again, the files reappear. From then on, the files always remain, even when installing another version. So, the problem seems to be with running an installer built using VS2008 and then running the same installer built by VS2010. The upgrade GUIDs on each installer are the same. What is the cause and how can I fix this?

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• How do I delete a foreign key in SQLAlchemy?

  - by Travis

  I'm using SQLAlchemy Migrate to keep track of database changes and I'm running into an issue with removing a foreign key. I have two tables, t_new is a new table, and t_exists is an existing table. I need to add t_new, then add a foreign key to t_exists. Then I need to be able to reverse the operation (which is where I'm having trouble). t_new = sa.Table("new", meta.metadata, sa.Column("new_id", sa.types.Integer, primary_key=True) ) t_exists = sa.Table("exists", meta.metadata, sa.Column("exists_id", sa.types.Integer, primary_key=True), sa.Column( "new_id", sa.types.Integer, sa.ForeignKey("new.new_id", onupdate="CASCADE", ondelete="CASCADE"), nullable=False ) ) This works fine: t_new.create() t_exists.c.new_id.create() But this does not: t_exists.c.new_id.drop() t_new.drop() Trying to drop the foreign key column gives an error: 1025, "Error on rename of '.\my_db_name\#sql-1b0_2e6' to '.\my_db_name\exists' (errno: 150)" If I do this with raw SQL, i can remove the foreign key manually then remove the column, but I haven't been able to figure out how to remove the foreign key with SQLAlchemy? How can I remove the foreign key, and then the column?

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• Uploadify refuses to upload WMV, FLV and MP4 files - SOLVED

  - by Jon Winstanley

  The uploadify plugin for JQuery seems very good and works for most file types. However, it allows me to upload all file types apart from the ones I need! Namely .WMV, .FLV and .MP4 Uploads of any other type work. I have already tried changing the fileExt parameter and also tried removing it altogether. I have testing in Google Chrome, IE7 and Firefox and none work for these file types. I have a ton of local projects already and uploading is not an issue on any other project, I even use the same example files (This is the first time I have used Uploadify) Is there a known reason for this behaviour? EDIT: Have found the issue. I had forgotten to add my usual .htaccess file to the example project.

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• How would I best address this object type heirachy? Some kind of enum heirarchy?

  - by FerretallicA

  I'm curious as to any solutions out there for addressing object heirarchies in an ORM approach (in this instance, using Entity Framework 4). I'm working through some docs on EF4 and trying to apply it to a simple inventory tracking program. The possible types for inventory to fall into are as follows: INVENTORY ITEM TYPES: Hardware PC Desktop Server Laptop Accessory Input (keyboards, scanners etc) Output (monitors, printers etc) Storage (USB sticks, tape drives etc) Communication (network cards, routers etc) Software What recommendations are there for handling enums in a situation like this? Are enums even the solution? I don't really want to have a ridiculously normalised database for such a relatively simple experiment (eg tables for InventoryType, InventorySubtype, InventoryTypeToSubtype etc). I don't really want to over-complicate my data model with each subtype being inherited even though no additional properties or methods are included (except PC types which would ideally have associated accessories and software but that's probably out of scope here). It feels like there should be a really simple, elegant solution to this but I can't put my finger on it. Any assistance or input appreciated!

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• Silverlight Project Not Updating When Ran

  - by Redburn

  I'm currently developing with VS2010 RC and Silverlight 4 and ran into small problem. My project when ran, would show a version I had built about 4 hours ago. (I built the project using the Business Template) The project itself will not update, meaning all the forms, and controls. I did the following: Restarted my computer Restarted Visual Studio Deleted the xap file in the ClientBin folder on the web side Deleted the Generated_Code folder on the client side Deleted the xap file from the Debug folder on the client side Opened the Solution's Configuration Manager and ensuring both my web and client projects are checked. Rebuilt, built, and cleaned every combination of the different projects and solution Is there a known bug or something else I can try?

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