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• how to get the text and properties(metadata like title,author,subject etc.,) of various files using

  - by Tanya Adams

  Can the IFilters be used to fetch document metadata like (To, From fields from an msg format message) and also all types of files? anyone know the solution?

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• How to properly downcast in C# with a SWIG generated interface?

  - by JG

  I've got a very large and mature C++ code base that I'm trying to use SWIG on to generate a C# interface for. I cannot change the actual C++ code itself but we can use whatever SWIG offers in the way of extending/updating it. I'm facing an issue where a function C++ is written as such: A* SomeClass::next(A*) The caller might do something like: A* acurr = 0; while( (acurr = sc->next(acurr)) != 0 ){ if( acurr isoftype B ){ B* b = (B*)a; ...do some stuff with b.. } elseif( acurr isoftype C ) ... } Essentially, iterating through a container elements that depending on their true type, do something different. The SWIG generated C# layer for the "next" function unfortunately does the following: return new A(); So the calling code in C# land cannot determine if the returned object is actually a derived class or not, it actually appears to always be the base class (which does make sense). I've come across several solutions: Use the %extend SWIG keyword to add a method on an object and ultimately call dynamic_cast. The downside to this approach, as I see it, is that this requires you to know the inheritance hierarchy. In my case it is rather huge and I see this is as a maintenance issue. Use the %factory keyword to supply the method and the derived types and have SWIG automatically generate the dynamic_cast code. This appears to be a better solution that the first, however upon a deeper look it still requires you to hunt down all the methods and all the possible derived types it could return. Again, a huge maintenance issue. I wish I had a doc link for this but I can't find one. I found out about this functionality by looking through the example code that comes with SWIG. Create a C# method to create an instance of the derived object and transfer the cPtr to the new instance. While I consider this clumsy, it does work. See an example below. public static object castTo(object fromObj, Type toType) { object retval = null; BaseClass fromObj2 = fromObj as BaseClass; HandleRef hr = BaseClass.getCPtr(fromObj2); IntPtr cPtr = hr.Handle; object toObj = Activator.CreateInstance(toType, cPtr, false); // make sure it actually is what we think it is if (fromObj.GetType().IsInstanceOfType(toObj)) { return toObj; } return retval; } Are these really the options? And if I'm not willing to dig through all the existing functions and class derivations, then I'm left with #3? Any help would be appreciated.

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• Use reflection to get a list of static classes

  - by Christian

  Hi, many questions are close, but none answers my problem... How do I use reflection in C# 3.5 to get all classes which are static from an assembly. I already get all Types defined, but there is no IsStatic property. Counting 0 constructors is really slow and did not work either. Any tips or a line of code? :-) Chris

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• Expression.Default in .NET 3.5

  - by Diego Mijelshon

  How can I emulate Expression.Default (new in .NET 4.0) in 3.5? Do I need to manually check the expression type and use different code for reference and value types?

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• Strange behavior of move with strings

  - by Umair Ahmed

  I am testing some enhanced string related functions with which I am trying to use move as a way to copy strings around for faster, more efficient use without delving into pointers. While testing a function for making a delimited string from a TStringList, I encountered a strange issue. The compiler referenced the bytes contained through the index when it was empty and when a string was added to it through move, index referenced the characters contained. Here is a small downsized barebone code sample:- unit UI; interface uses System.SysUtils, System.Types, System.UITypes, System.Rtti, System.Classes, System.Variants, FMX.Types, FMX.Controls, FMX.Forms, FMX.Dialogs, FMX.Layouts, FMX.Memo; type TForm1 = class(TForm) Results: TMemo; procedure FormCreate(Sender: TObject); end; var Form1: TForm1; implementation {$R *.fmx} function StringListToDelimitedString ( const AStringList: TStringList; const ADelimiter: String ): String; var Str : String; Temp1 : NativeInt; Temp2 : NativeInt; DelimiterSize : Byte; begin Result := ' '; Temp1 := 0; DelimiterSize := Length ( ADelimiter ) * 2; for Str in AStringList do Temp1 := Temp1 + Length ( Str ); SetLength ( Result, Temp1 ); Temp1 := 1; for Str in AStringList do begin Temp2 := Length ( Str ) * 2; // Here Index references bytes in Result Move ( Str [1], Result [Temp1], Temp2 ); // From here the index seems to address characters instead of bytes in Result Temp1 := Temp1 + Temp2; Move ( ADelimiter [1], Result [Temp1], DelimiterSize ); Temp1 := Temp1 + DelimiterSize; end; end; procedure TForm1.FormCreate(Sender: TObject); var StrList : TStringList; Str : String; begin // Test 1 : StringListToDelimitedString StrList := TStringList.Create; Str := ''; StrList.Add ( 'Hello1' ); StrList.Add ( 'Hello2' ); StrList.Add ( 'Hello3' ); StrList.Add ( 'Hello4' ); Str := StringListToDelimitedString ( StrList, ';' ); Results.Lines.Add ( Str ); StrList.Free; end; end. Please devise a solution and if possible, some explanation. Alternatives are welcome too.

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• Managing NSStoreType changes between debug and release builds

  - by Eimantas

  NSXMLTypeStore is used when starting Core Data backed application by default because it's good for debugging purposes. But practice dictates that developer should use either NSBinaryStoreType, NSInMemoryStoreType or NSSQLiteStoreType store types in release builds. How do you manage changes between debug and release builds? I believe that changing store type from NSXMLTypeStore to, say, NSBinaryStoreType in code on each release is kinda cumbersome.

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• Python vs. Java performance (runtime speed)

  - by Bijan

  Ignoring all the characteristics of each languages and focusing SOLELY on speed, which language is better performance-wise? You'd think this would be a rather simple question to answer, but I haven't found a decent one. I'm aware that some types of operations may be faster with python, and vice-versa, but I cannot find any detailed information on this. Can anyone shed some light on the performance differences?

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• What type of lambda calculus would Lisp loosely be an example of?

  - by Jason Baker

  I'm trying to get a better grip on how types come into play in lambda calculus. Admittedly, a lot of the type theory stuff is over my head. Lisp is a dynamically typed language, would that roughly correspond to untyped lambda calculus? Or is there some kind of "dynamically typed lambda calculus" that I'm unaware of?

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• Best language for scripting large scale file management

  - by Dan

  The National Park Service's Natural Sounds Program collects multiple terabytes of data each year measuring soundscapes. In your opinion, what is best available scripting language to manage massive amounts of files and file types? We would like to easily design and run efficient user-friendly scripts to search for and retrieve/create copies of files that may be located in different directories according a single static hierarchy. The OS will most likely be windows. Thanks!

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• Email from an app, but not use a a pop up controller, just text inside a text box.

  - by Sam Jarman

  Hey is there any way to send whats in a text view (im trying to make a suggestion box) to my email address? example user types in the box " I think you should add twitter support" then that is sent in the background to my email address [email protected] then a message is popped up on the screen saying "suggestion sent" just an example of what i mean Any ideas, tutorial links would be greatly appreciated guys Thanks

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• DVD Share on Vista Home Premium Failing

  - by hpunyon

  UPDATE: - I can't find any Local Policy Editor for Vista Home Premium, as suggested. - I did learn about registry keys: allocatecdroms, allocatefloppies, allocatedasd and tried adding these keys (individually and collectively) and setting them to both 0 or 1. There was no positive affect on read access to the DVD root folder - always Access Denied. ORIGINAL POST: Failing read access to the root folder of a DVD drive in Vista Home Premium laptop using the Guest account - Access Denied. The client is an XP Home PC that can see, but not access, the data in the share. I'm only trying to read the data DVD - not trying to write/burn anything. On the Vista laptop, I have: All Firewalls and Antivirus disabled.UAC disabled. Password checking disabled. "Advanced Shared" the DVD drive, with "Everyone" having full-access permissions to the share. Tried adding Guest and Anonymous users having full-access permissions to the share. RestrictAnonymous=0 set in the registry. Both PC's are in the same workgroup (MSHOME) The XP Home client sees the shared DVD in \Vista_Hostname\ but when I double click the drive icon on the client, I get a popup that access is denied, check with the administrator, etc. I can share other folders on the Vista PC and see and READ these from the XP Home client. If I enable password checking on the Vista side, I get a user/password popup, and I can authenticate (using my known Vista account, that happens to have Admin rights) and then I can get to see and read the DVD data. I need to open this up so that the (default) Guest user can see and access the DVD data files.

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• Understanding Virtualization

  - by mohit

  Hi, I wana to know about Virtualization in detail. But start from basics, like what is virtualization, with real world examples and scenarios. When ever i search, i got Virtualization technologies, but i want to learn and in fcat know what exactly is virtualization, its types n all..... Please help me in getting practical details of term "Virtualization"

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• Converting a ts (Time Series) object to a Vector in R

  - by taskforce145

  I need to use a function on a vector that does not take a ts object. I'm trying to convert it to a plain old vector but I just can't seem to figure it out. I googled around but mostly people are trying to convert data types into ts object. I want to go the other way. Any help would be appreciated.

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• In Zend studio, how to tell the ide the type of a variable, so I have auto completion?

  - by Itay Moav

  In php we use includes. So variables defined in one file and then their scope spans included files too. Zend studio has no idea how to get the type of the variable I am using inside an included file, this is very annoying when the variable type is a big class. Is there a way to hint the ide about variable types? in included files?

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• How to use a type within a "black-box" .NET assembly?

  - by smwikipedia

  I know that .NET assembly is self-descriptive because of the metadata. Now suppose I have a black-box assembly which I know nothing about. Could I find out the types contained in it and use their methods and pass arguments? How? Sampe code snippets will be deeply appreciated. Many thanks.

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• Is there a "good enough" solution for the halting problem?

  - by EpsilonVector

  It is known that the halting problem cannot have a definite solution, one that a) returns true <== the program does indeed halt, and b) handles any input, but I was wondering if there are good enough solutions to the problem, ones that can maybe handle certain types of program flows perfectly, or is able to identify it when it cannot correctly solve the problem, and so on.... If so, how good are they, and what ideas/limitations do they rely on?

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• Django admin- constrain visibility of models and model instances based on who logged in

  - by theactiveactor

  Using the django admin, I would like to be able to specify which models a user sees when he logs in. For a stretch goal, for each model types a user can see, I would like to specify a filter to limit which instances of the model the user can see. Could someone please provide a pointer for how to go about achieving this?

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• Getting prompted for password accessing page through script even when client and server are in same

  - by Munawar

  I'm trying to pull up an internal webpage in automated fashion using the methods in 'Internetexplorer.Application' using vbscript. But I'm getting prompted for password, although the client and the server both are in the same domain. Predictably when I manually try to access the web page, I don't have any problem. Only when I try using cscript.exe or iexplore.exe, I get prompted. I'm trying to automate some of the smoke test we do after a new build is deployed. But this password prompt is getting in the way. Following are the system specs Client machine - IE 7.0, OS is Windows server 2003 Server machine - Windows Server 2008 Both are in the same domain. So far I've unsuccessfully tried following to automate the password input system.diagnostics.process.start var WinHttpReq = new ActiveXObject("WinHttp.WinHttpRequest.5.1"); WinHttpReq.Open("GET", "http://website", false); WinHttpReq.SetCredentials("username", "password", 0); Nothing seems to work I checked in IIS. we have only anonymous and forms authentication enabled Is there any configuration setting in the client machine that can be tweaked to bypass this, although I'd hate to do it since you step on the toes of twenty people trying to do that. Preferable way would be to programmatically input it if its possible. Also, if you can suggest a more appropriate forum, that'd be great too. Please help.

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• Is there a way to download the rendered view of a google motion-chart as a .png?

  - by Johannes Meier

  I am using Google motion-charts in a web-site developed in python/django. Is there a way to save the rendered view of a google motion-chart as an image (server-side)? For the more basic chart types - such as scatter diagrams - the command chart.download('scatter-random-marker-sizes.png') works fine, but I have not found an equivalent for motion charts.

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• How to make a report with count of type of cases in each month in Acess 2010

  - by amir shadaab

  I have a database is access with each record having a date and yes/no type columns for each record which shows which category the record comes under. I want to create a report which shows the types of cases in each month by taking a date range as a parameter through prompts. I have done the prompt part but I'm not sure how the query should be to show values for each month in that date range. Can someone please help me with this?

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• How to move your Windows User Profile to another drive in Windows 8

  - by Mark

  I like to have my user folder on a different drive (D:) than my OS is (C:). Reading the following post I decided to give it a try. All went quite well, untill I found out that my Windows 8 Apps won't execute anymore (other than that I didn't noticed any problems). My apps do work, while using an account that isn't moved. In the eventviewer I've found error messages like these: App <Microsoft.MicrosoftSkyDrive> crashed with an unhandled Javascript exception. App details are as follows: Display Name:<SkyDrive>, AppUserModelId: <microsoft.microsoftskydrive_8wekyb3d8bbwe!Microsoft.MicrosoftSkyDrive> Package Identity:<microsoft.microsoftskydrive_16.4.4204.712_x64__8wekyb3d8bbwe> PID:<4452>. The details of the JavaScript exception are as follows Exception Name:<WinRT error>, Description:<Loading the state store failed. > , HTML Document Path:</modernskydrive/product/skydrive/App.html>, Source File Name:<ms-appx://microsoft.microsoftskydrive/jx/jx.js>, Source Line Number:<1>, Source Column Number:<27246>, and Stack Trace: ms-appx://microsoft.microsoftskydrive/jx/jx.js:1:27246 localSettings() ms-appx://microsoft.microsoftskydrive/jx/jx.js:1:51544 _initSettings() ms-appx://microsoft.microsoftskydrive/jx/jx.js:1:54710 getApplicationStatus(boolean) ms-appx://microsoft.microsoftskydrive/jx/jx.js:1:48180 init(object) ms-appx://microsoft.microsoftskydrive/jx/jx.js:1:45583 Application(number, boolean) ms-appx://microsoft.microsoftskydrive/modernskydrive/product/skydrive/App.html:216:13 Anonymous function(object) Using ProcMon, I see a lot of access denied messages, like these: Date & Time: 12-9-2012 9:32:20 Event Class: File System Operation: CreateFile Result: ACCESS DENIED Path: D:\Users\John\AppData\Local\Packages\microsoft.microsoftskydrive_8wekyb3d8bbwe\Settings\settings.dat TID: 2520 Duration: 0.0000149 Desired Access: Read Data/List Directory, Write Data/Add File, Read Control Disposition: OpenIf Options: Sequential Access, Synchronous IO Non-Alert, No Compression Attributes: N ShareMode: None AllocationSize: 0 Any idea how to solve this? I noticed that the app folders e.g.: D:\Users\john\AppData\Local\Packages\microsoft.microsoftskydrive_8wekyb3d8bbwe had a different owner than the old profile folder had. Old profile folder had john as owner where my new profile folder had the Administrators group as owner. Changing this didn't help unfortunately.

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• Drupal 7: One-time user account

  - by Noob

  I'm going to create a survey in Drupal 7 with the webform module, installed on a debian system which may be adapted in every way. The users (personally known, approx. 120) doing that survey will walk into a room and complete the survey in browsers on different computers. After that, they'll leave the room and other persons will enter, complete the survey on the same computers and so on. Each user may enter only one submission. The process needs to be anonymous, i. e. I mustn't have any idea of who did wich submission. My current solution is to generate random one-time-passwords and hand out one password per user (without noting who got which password). Within the survey there will be a password field where the one-time-password is entered. The value is checked by webform to be unique. I'll get the data via csv or Excel and verify the passwords manually in excel by comparing them to the list of valid passwords. The problem is: I don't like the idea of manually generating the password list, copying it to excel and doing a manual check. That's a good idea for one-time-use, but we're going to repeat the survey every once in a while. I'd rather generate one-time-logins (like user0001/fdlkjewf, user0002/dfrefnnr, ...) for each survey, hand them out to the users and let drupal/debian/whatever check whether a submission is valid or not. Do you have any idea how to batch-generate about 120 users with one-time-passwords in Drupal 7 and verify that each user may submit the form only once? Do you even have a better idea how to accomplish the task within the intranet? Thank you for your help.

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• Cakephp change model's title without rename model/dbtable

  - by Vincent

  I have a table that store all information about class, but because Class is reserved for class name I had to rename the table from classes to types. But in the view section I need it to be displayed as "Class", including the Paginator links. Anyway to achieve this by adding something in the Type model, without completely customize Paginator and and all view compoenents?

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• IIS 6 Windows Authentication in ASP.Net app fails

  - by Kjensen

  I am trying to install an ASP.Net app on an IIS6 webserver. The site requires the user to authenticate with windows, and this works on several other apps on the same server. In IIS I have enabled anonymous access and windows authentication. In web.config, authentication is set to: <authentication mode="Windows"/> and authorization...: <authorization> <allow roles="Users"/> <deny users="*"/> </authorization> Ie. allow all users in role "Users" and deny everybody else. This is the approach that is working with several other apps on the same server. If I run the site, I am prompted for username and password. If I remove the line: <deny users="*"/> I can access the site and everything works - but the user credentials are not passed to the site (Page.User.Identity.Name returns a blank string in ASP.Net). The site has identical (inherited) file permissions as other working sites on the server. The only difference in authentication/authorization between this site and the other working sites is, that this runs Asp.Net 4 (but there are other working asp.net 4 sites on the server as well). What am I missing here? Where should I look?

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• What are the advantages and disadvantages of using boost::iterator_facade?

  - by Billy ONeal

  Yep -- the title pretty much sums it up. I've got quite a few types that implement iterator concepts, and I'm wondering if it's worthwhile to pull in this boost header instead of implementing things manually.

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