type checking - Page 565

scala REPL is slow on vista

- by Jacques René Mesrine

I installed scala-2.8.0.RC3 by extracting the tgz file into my cygwin (vista) home directory. I made sure to set $PATH to scala-2.8.0.RC3/bin. I start the REPL by typing: $ scala Welcome to Scala version 2.8.0.RC3 (Java HotSpot(TM) Client VM, Java 1.6.0_20). Type in expressions to have them evaluated. Type :help for more information. scala> Now when I tried to enter an expression scala> 1 + 'a' the cursor hangs there without any response. Granted that I have chrome open with a million tabs and VLC playing in the background, but CPU utilization was 12% and virtual memory was about 75% utilized. What's going on ? Do I have to set the CLASSPATH or perform other steps.

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Where i am doing wrong in this?

- by kumar

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Classic ASP Site Throwing Date Conversion Error After Moving Servers?

- by leen3o

I am moving an old store from a Win2003 IIS6 server to a Win2008 IIS7 server, moved everything across including database. The front end seems to work just fine, but when I login it has to do pull in data based on date ranges and now from no where I am getting this error? The conversion of a varchar data type to a datetime data type resulted in an out-of-range value Any ideas why this would do this on the new server and NOT on the old one? No code has changed and the DB is a backup of the one from the old server??

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Improve a haskell script

- by Hector Villalobos

I'm a newbie in Haskell and I'd like some opinions about improving this script. This is a code generator and requires a command line argument to generate the sql script. ./GenCode "people name:string age:integer" Code: import Data.List import System.Environment (getArgs) create_table :: String -> String create_table str = "CREATE TABLE " ++ h (words str) where h (x:xs) = let cab = x final = xs in x ++ "( " ++ create_fields xs ++ ")" create_fields (x:xs) = takeWhile (/=':') x ++ type x ++ sig where sig | length xs > 0 = "," ++ create_fields xs | otherwise = " " ++ create_fields xs create_fields [] = "" type x | isInfixOf "string" x = " CHARACTER VARYING" | isInfixOf "integer" x = " INTEGER" | isInfixOf "date" x = " DATE" | isInfixOf "serial" x = " SERIAL" | otherwise = "" main = mainWith where mainWith = do args <- getArgs case args of [] -> putStrLn $ "You need one argument" (x:xs) -> putStrLn $ (create_table x)

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How to set html content in Moodialog

- by Diego

Hello, i've just downloaded Moodialog, a Mootools plugin for dialog, but i have a problem. If content is set via parameters it will be text and not html. Can you help me change the function to accept html? I suppose that this is the code to be edit. setContent: function(){ var content = Array.from(arguments); if (content.length == 1) content = content[0]; this.content.empty(); var type = typeOf(content); if (['string', 'number'].contains(type)) this.content.set('text', content); else this.content.adopt(content); return this; }, I tried to edit 'text' in 'html', but it will not work. Thanks for help (and sorry for my bad english).

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Is there a cleaner way to Bind property to owner's DataContext?

- by Dan Bryant

I have some code that looks like this: <Expander Header="{Binding SelectedSlot.Name}" Visibility="{Binding ShowGroupSlot, Converter={StaticResource BooleanToVisibility}}"> <Controls:GroupPrototypeSlotControl Slot="{Binding DataContext.SelectedSlot, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Expander}}}" /> </Expander> This works, but the ugliness of the Slot Binding bothers me. This is required because the GroupPrototypeSlotControl has a GroupPrototypeViewModel as its DataContext. If I simply use {Binding SelectedSlot}, it attempts to resolve it on the 'child' ViewModel, which fails. I get around this by explicitly looking at the DataContext of my parent control. Is there a cleaner way to do this type of binding?

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Can't add domain users to Reporting Services 2008

- by Jeremy

I have SSRS 2008 setup on the database server. The server is part of the domain. Reporting Services is running under NetworkService. When I try to add a domain user using the web interface (Site Settings -- Security -- New Role Assignment), the page posts back but the user is not in the list. The server's log file contains the following Unhandled Exception: ui!ReportManager_0-1!954!01/12/2009-10:14:52:: Unhandled exception: System.Security.Principal.IdentityNotMappedException: Some or all identity references could not be translated. at System.Security.Principal.SecurityIdentifier.Translate(IdentityReferenceCollection sourceSids, Type targetType, Boolean forceSuccess) at System.Security.Principal.SecurityIdentifier.Translate(Type targetType) at System.Security.Principal.WindowsIdentity.GetName() at System.Security.Principal.WindowsIdentity.get_Name() at ReportingServicesHttpRuntime.RsWorkerRequest.GetServerVariable(String name) at System.Web.Security.WindowsAuthenticationModule.OnEnter(Object source, EventArgs eventArgs) at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) Any one have an idea on how to fix this?

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Where does the temporary flash file get stored when I am viweing from Firefox

- by Nishant

I am watching a lecture and it seems to be adobe flash ...I wanna save this video that I am viewing . The website I am checking is http://cs75.tv/2009/fall/ . I am using Firefox . Dont know if this info helps , but .... My about:cache result is this . Memory cache device Number of entries: 212 Maximum storage size: 13312 KiB Storage in use: 8087 KiB Inactive storage: 6819 KiB List Cache Entries Disk cache device Number of entries: 3224 Maximum storage size: 500000 KiB Storage in use: 26066 KiB Cache Directory: C:\Documents and Settings\nvarm\Local Settings\Application Data\Mozilla\Firefox\Profiles\d74svniy.default\Cache List Cache Entries Offline cache device Number of entries: 0 Maximum storage size: 512000 KiB Storage in use: 0 KiB Cache Directory: C:\Documents and Settings\nvarm\Local Settings\Application Data\Mozilla\Firefox\Profiles\d74svniy.default\OfflineCache List Cache Entries

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Where does the temporary flash file get stored when I am viweing from Firefox

- by Nishant

I am watching a lecture and it seems to be adobe flash ...I wanna save this video that I am viewing . The website I am checking is http://cs75.tv/2009/fall/ . I am using Firefox . Dont know if this info helps , but .... My about:cache result is this . Memory cache device Number of entries: 212 Maximum storage size: 13312 KiB Storage in use: 8087 KiB Inactive storage: 6819 KiB List Cache Entries Disk cache device Number of entries: 3224 Maximum storage size: 500000 KiB Storage in use: 26066 KiB Cache Directory: C:\Documents and Settings\nvarm\Local Settings\Application Data\Mozilla\Firefox\Profiles\d74svniy.default\Cache List Cache Entries Offline cache device Number of entries: 0 Maximum storage size: 512000 KiB Storage in use: 0 KiB Cache Directory: C:\Documents and Settings\nvarm\Local Settings\Application Data\Mozilla\Firefox\Profiles\d74svniy.default\OfflineCache List Cache Entries

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Visual Studio Debugger Voodoo

- by LoveMeSomeCode

Ok, maybe this isn't so amazing considering I don't really understand how the debugger works in the first place, let alone Edit and Continue, which is totally amazing. But I was wondering if anyone knew what the debugger is doing with variable declarations in this scenario. I can be debugging through my code, move the line of execution ahead - past a variables initial declaration and assignment, and the code still runs ok. If it's a value type it will have it's default value, for a ref type, null. So if I create a function that uses a variable before it's declared it won't compile, but if I use the debugger to run it that way it will still run without error. Why is this? And is this related to the fact that you can't put a breakpoint on a declaration?

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Returning a C++ reference in a const member functionasses

- by Chris Kaminski

A have a class hierarchy that looks somethign like this: class AbstractDataType { public: virtual int getInfo() = 0; }; class DataType: public AbstractDataType { public: virtual int getInfo() { }; } class Accessor { DataType data; public: const AbstractDataType& getData() const { return(data); } } Well, GCC 4.4 reports: In member function ‘const AbstractDataType& Accessor::getData() const’: error: invalid initialization of reference of type ‘const AbstractDataType&’ from expression of type ‘const DataType’ Where am I going wrong - is this a case where I MUST use a pointer?

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POST request and Node.js without Nerve

- by intellidiot

Is there any way to accept POST type requests without using Nerve lib in Node.js?

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Simplest way to flatten document to a view in RavenDB

- by degorolls

Given the following classes: public class Lookup { public string Code { get; set; } public string Name { get; set; } } public class DocA { public string Id { get; set; } public string Name { get; set; } public Lookup Currency { get; set; } } public class ViewA // Simply a flattened version of the doc { public string Id { get; set; } public string Name { get; set; } public string CurrencyName { get; set; } // View just gets the name of the currency } I can create an index that allows client to query the view as follows: public class A_View : AbstractIndexCreationTask<DocA, ViewA> { public A_View() { Map = docs => from doc in docs select new ViewA { Id = doc.Id, Name = doc.Name, CurrencyName = doc.Currency.Name }; Reduce = results => from result in results group on new ViewA { Id = result.Id, Name = result.Name, CurrencyName = result.CurrencyName } into g select new ViewA { Id = g.Key.Id, Name = g.Key.Name, CurrencyName = g.Key.CurrencyName }; } } This certainly works and produces the desired result of a view with the data transformed to the structure required at the client application. However, it is unworkably verbose, will be a maintenance nightmare and is probably fairly inefficient with all the redundant object construction. Is there a simpler way of creating an index with the required structure (ViewA) given a collection of documents (DocA)? FURTHER INFORMATION The issue appears to be that in order to have the index hold the data in the transformed structure (ViewA), we have to do a Reduce. It appears that a Reduce must have both a GROUP ON and a SELECT in order to work as expected so the following are not valid: INVALID REDUCE CLAUSE 1: Reduce = results => from result in results group on new ViewA { Id = result.Id, Name = result.Name, CurrencyName = result.CurrencyName } into g select g.Key; This produces: System.InvalidOperationException: Variable initializer select must have a lambda expression with an object create expression Clearly we need to have the 'select new'. INVALID REDUCE CLAUSE 2: Reduce = results => from result in results select new ViewA { Id = result.Id, Name = result.Name, CurrencyName = result.CurrencyName }; This prduces: System.InvalidCastException: Unable to cast object of type 'ICSharpCode.NRefactory.Ast.IdentifierExpression' to type 'ICSharpCode.NRefactory.Ast.InvocationExpression'. Clearly, we also need to have the 'group on new'. Thanks for any assistance you can provide. (Note: removing the type (ViewA) from the constructor calls has no effect on the above)

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How does this If conditional work in Python?

- by Sergio Boombastic

from google.appengine.api import users from google.appengine.ext import webapp from google.appengine.ext.webapp.util import run_wsgi_app class MainPage(webapp.RequestHandler): def get(self): user = users.get_current_user() if user: self.response.headers['Content-Type'] = 'text/plain' self.response.out.write('Hello, ' + user.nickname()) else: self.redirect(users.create_login_url(self.request.uri)) application = webapp.WSGIApplication( [('/', MainPage)], debug=True) def main(): run_wsgi_app(application) if __name__ == "__main__": main() I don't understand how this line works: if user: self.response.headers['Content-Type'] = 'text/plain' self.response.out.write('Hello, ' + user.nickname()) else: self.redirect(users.create_login_url(self.request.uri)) I'm guessing the users.get_current_user() return a boolean? Then, if that is the case how can it get a .nickname() method? Thanks for the guidance.

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How can I implement a site with ASP.NET MVC without using Visual Studio?

- by Cheeso

I have seen ASP.NET MVC Without Visual Studio, which asks, Is it possible to produce a website based on ASP.NET MVC, without using Visual Studio? And the accepted answer is, yes. Ok, next question: how? Here's an analogy. If I want to create an ASP.NET Webforms page, I load up my favorite text editor, create a file named Something.aspx. Then I insert into that file, some boilerplate: <%@ Page Language="C#" Debug="true" Trace="false" Src="Sourcefile.cs" Inherits="My.Namespace.ContentsPage" %> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Title goes here </title> <link rel="stylesheet" type="text/css" href="css/style.css"></link> <style type="text/css"> #elementid { font-size: 9pt; color: Navy; ... more css ... } </style> <script type="text/javascript" language='javascript'> // insert javascript here. </script> </head> <body> <asp:Literal Id='Holder' runat='server'/> <br/> <div id='msgs'></div> </body> </html> Then I also create the Sourcefile.cs file: namespace My.Namespace { using System; using System.Web; using System.Xml; // etc... public class ContentsPage : System.Web.UI.Page { protected System.Web.UI.WebControls.Literal Holder; void Page_Load(Object sender, EventArgs e) { // page load logic here } } } And that is a working ASPNET page, created in a text editor. Drop it into an IIS virtual directory, and it's working. What do I have to do, to make a basic, hello, World ASPNET MVC app, in a text editor? (without Visual Studio) Suppose I want a basic MVC app with a controller, one view, and a simple model. What files would I need to create, and what would go into them?

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Using System.DateTime in a C# Lambda expression gives an exception

- by Samantha J

I tried to implement a suggestion that came up in another question: Stackoverflow question Snippet here: public static class StatusExtensions { public static IHtmlString StatusBox<TModel>( this HtmlHelper<TModel> helper, Expression<Func<TModel, RowInfo>> ex ) { var createdEx = Expression.Lambda<Func<TModel, DateTime>>( Expression.Property(ex.Body, "Created"), ex.Parameters ); var modifiedEx = Expression.Lambda<Func<TModel, DateTime>>( Expression.Property(ex.Body, "Modified"), ex.Parameters ); var a = "a" + helper.HiddenFor(createdEx) + helper.HiddenFor(modifiedEx); return new HtmlString( "Some things here ..." + helper.HiddenFor(createdEx) + helper.HiddenFor(modifiedEx) ); } } When implemented I am getting the following exception which I don't really understand. The exception points to the line starting with "var createdEx =" System.ArgumentException was unhandled by user code Message=Expression of type 'System.Nullable`1[System.DateTime]' cannot be used for return type 'System.DateTime' Source=System.Core StackTrace: Can anyone help me out and suggest what I could do to resolve the exception?

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How to remove the explicit dependencies to other projects' libraries in Eclipse launch configuration

- by euluis

In Eclipse it is possible to create launch configurations in a project, specifying the runtime dependencies from another project. A problem I found was that if you have a multiple project workspace, being possible that each project has its own libraries, it is easy to add explicit dependencies in a secondary project to libraries that are of another project and therefore subject to change. An example of this problem follows: proj1 +-- src +-- lib +-- jar1-v1.0.jar +-- jar2-v1.0.jar proj2 +-- src +-- proj2-tests.launch I don't have a dependency from the code in proj2/src to the libraries in proj1/lib. Nevertheless, I do have a dependency from proj2/src to proj1/src, although since there is an internal dependency in the code in proj1/src to its libraries jar1-v1.0.jar and jar2.v1.0.jar, I have to add a dependency in proj2-tests.launch to the libraries in proj1/lib. This translates to the following ugly lines in proj2-tests.launch: <listEntry value="<?xml version="1.0" encoding="UTF-8" standalone="no"?> <runtimeClasspathEntry path="3" projectName="proj1" type="1"/> "/> <listEntry value="<?xml version="1.0" encoding="UTF-8" standalone="no"?> <runtimeClasspathEntry internalArchive="/proj1/lib/jar1-v1.0.jar" path="3" type="2"/> "/> <listEntry value="<?xml version="1.0" encoding="UTF-8" standalone="no"?> <runtimeClasspathEntry internalArchive="/proj1/lib/jar2-v1.0.jar" path="3" type="2"/> "/> This wouldn't be a big problem if there wasn't the need from time to time to evolve the software, upgrade the libraries and etc. Consider the common need to upgrade the libraries jar1-v1.0.jar and jar2-v1.0.jar to their versions v1.1. Consider that you have about 10 projects in one workspace, having about 5 libraries each and about 4 launch configurations. You get a maintenance overhead in doing a simple upgrade of a library, which normally must imply changes in files for which there wasn't the need for. Or maybe I'm doing something wrong... What I would like to state is proj2 depends on proj1 and on its libraries and having this translated to simply that in the *.launch files. Is that possible?

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Using nodereference + views to create combined view

- by Ian Silber

I'm trying to set up a relational View but not sure how to do it. Here's an example of what I'm going for using the node types Artist and Song. Artist Song Length Bob Dylan Like a Rolling Stone 2:00 Bruce Springsteen Atlantic City 4:00 Burce Springsteen Born to Run 5:24 Van Morrison Domino 3:22 Van Morrison Brown Eyed Girl 4:30 Assuming I have an Artist node type that has a node reference to Song (set to unlimited) and a Song data type with an additional field for length, how would I go about configuring the view to output this view? Thanks! Ian

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Unable to see hidden files

- by TheGoodUser-Sp

I have BitDefender (With last update) on my Windows-7. I want to see hidden files, so from Tools > Folder Options > View , I change the settings as below, and click on OK: But I can't see hidden files. when I double check the Options, I see the settings changed automatically as below : I know this is a virus-like application! checking by a virus total via ProcessExplorer didn't help : How can I understand with process is related to this issue?

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Where does the temporary flash file get stored when I am viweing from Firefox

- by Nishant

I am watching a lecture and it seems to be adobe flash ...I wanna save this video that I am viewing . The website I am checking is http://cs75.tv/2009/fall/ . I am using Firefox . Dont know if this info helps , but .... My about:cache result is this . Memory cache device Number of entries: 212 Maximum storage size: 13312 KiB Storage in use: 8087 KiB Inactive storage: 6819 KiB List Cache Entries Disk cache device Number of entries: 3224 Maximum storage size: 500000 KiB Storage in use: 26066 KiB Cache Directory: C:\Documents and Settings\nvarm\Local Settings\Application Data\Mozilla\Firefox\Profiles\d74svniy.default\Cache List Cache Entries Offline cache device Number of entries: 0 Maximum storage size: 512000 KiB Storage in use: 0 KiB Cache Directory: C:\Documents and Settings\nvarm\Local Settings\Application Data\Mozilla\Firefox\Profiles\d74svniy.default\OfflineCache List Cache Entries

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Get HTML DOM with CSS

- by 2x2p1p

CSS can apply styles in elements through one ID, class or pseudo-selector, but I would like to get the HTML tree, something like in javascript: <script type = "text/javascript"> window.onload = function () { var div = document.getElementsByTagName ("div"); div[0].style.backgroundColor = "gray"; div[0].style.padding = "20px"; } </script> So for example: <style type = "text/css"> div[0] { /* Wrong but i tried :( */ background-color: gray; padding: 20px; } </style> <div > <div>...</div> </div> I'm tired of assign IDs to millions and millions of elements; is there a way to do this?

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WCFExtras SOAP headers support returns null reference exception

- by jlp

I use WCFExtras to add headers to my service. I set up everything according to http://wcfextras.codeplex.com/wikipage?title=HowToUse&referringTitle=Home My WCF client works but throws NullReferenceException on both: client.InnerChannel.SetHeader("myHeader", new local.Header()); and var header = client.InnerChannel.GetHeader<local.Header>("myHeader"); I wonder if web.config element <wsdlExtensions location="noidea" singleFile="True"/> might cause a problem because I don't know what type in location attribute. I simply tried to type service address but it didn't fix anything.

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C# Pass Generics At Runtime

- by TheCloudlessSky

I have a method like the following: public IEnumerable<T> GetControls<T>() : where T : ControlBase { // removed. } I then created a class: public class HandleBase<TOwner> : ControlBase : TOwner { // Removed } I'd like to be able to call GetControls<HandleBase<this.GetType()>>; where it would use the type of THIS class to pass to the HandleBase. This would in essentially get all HandleBase that have an owner of THIS type. How can I achieve this?

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what is the differences between JSON and JSONP?

- by Mohammad

Format wise, file type wise and practical use wise?

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OWL inferencing question

- by user439170

I am using the Jena semantic web framework version 2.6.3. I have code that creates a model with owl inferencing and then adds the following triples: [:bnode-3 rdf:type owl:Restriction] [:bnode-3 owl:onProperty :offspringOf] [:bnode-3 owl:someValuesFrom :Person] [:bnode-3 rdfs:subClassOf :Person] bnode-3 is supposed to be a restriction class which, for example, would contain :joe if :bob is a :Person and the following triple were asserted: [:joe :offspringOf :bob]. Then, since the restriction class is a subclass of Person, :joe would also be a person. And, in fact, this works. Whats confusing to me is that after I assert just the 4 triples at the top of this post, the inferencer creates a blank node which is a Person. In other words, the following triple is now in the model: [_:b0 rdf:type :Person] I don't understand why it would do this. Any help in understanding this would be greatly appreciated. Thanks. Kent.

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Search found 44956 results on 1799 pages for 'type checking'.

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- by Jacques René Mesrine

- by kumar

- by leen3o

- by Hector Villalobos

- by Diego

- by Dan Bryant

- by Jeremy

- by Nishant

- by Nishant

- by LoveMeSomeCode

- by Chris Kaminski

- by intellidiot

- by degorolls

- by Sergio Boombastic

- by Cheeso

- by Samantha J

- by euluis

- by Ian Silber

- by TheGoodUser-Sp

- by Nishant

- by 2x2p1p

- by jlp

- by TheCloudlessSky

- by Mohammad

- by user439170

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