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• What's the equivalent to "method reference" in Ruby

  - by Oscar Reyes

  for instance in python it is possible to assign a method to a variable: class MyClass def myMethod(self): return "Hi" x = MyClass() method = x.myMethod print method() # prints Hi I know this should be possible in Ruby, but I don't know what's the syntax.

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• Can any language potentially be used to create any program?

  - by Matt

  I've heard that given a programmer with enough time and skill in any particular language and enough lines of code, then any program could be created with any given language. I know its certainly not going to be cost-efficient, for instance, to rewrite Adobe Photoshop in BASIC, but could a good enough and patient enough programmer potentially create any program in any language?

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• deep or shallow copying?

  - by Dervin Thunk

  Dear all. I was wondering if there are examples of situations where you would purposefully pass an argument by value (deep copy) in C. For instance, passing a char to a function is usually cheaper in space than passing a char* (if there's no need to share the value), since char is 1 byte and pointers are, well, whatever they are in the architecture (4 in my 32 bit machine). ?(When) do you want to pass (big) deep copies to functions? if so, why?

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• Is there anyway to access root on iPhone using NSFileManager?

  - by arashaga

  I was trying to access the root directory and list the contents of it but I got 0 folders listed there. I s there anyway to access it for instance to query the SMS.db under root/SMS folder. Thank you all in advance.

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• c# reflection: How can I invoke a method with an out parameter ?

  - by ldp615

  I want expose WebClient.DownloadDataInternal method like below: [ComVisible(true)] public class MyWebClient : WebClient { private MethodInfo _DownloadDataInternal; public MyWebClient() { _DownloadDataInternal = typeof(WebClient).GetMethod("DownloadDataInternal", BindingFlags.NonPublic | BindingFlags.Instance); } public byte[] DownloadDataInternal(Uri address, out WebRequest request) { _DownloadDataInternal.Invoke(this, new object[] { address, out request }); } } WebClient.DownloadDataInternal has a out parameter, I don't know how to invoke it. Help!

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• How to add days to a date in Java

  - by terrific

  I want to add days to a date to get a new date in Java. How to achieve it using the Calender class. Calender dom = new GregorianCalender(d, m y); is the instance of my date of manufacture and I want to reach to date of expiry adding some 100 days to the current date and store it in doe but unable to do that. Any help would be appreciable.

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• Error when connecting to hello world yesod example on Windows 8

  - by reltone

  I start the executable (after building it with cabal) and it says "Application launched, listening on port 3000." Next I connect to it with my web browser and the console says "threadWaitRead requires -threaded on Windows, or use System.IO.hWaitForInput." The web browser never connects. Not sure what this is actually recommending I do to resolve the problem. {-# LANGUAGE TypeFamilies, QuasiQuotes, MultiParamTypeClasses, TemplateHaskell, OverloadedStrings #-} import Yesod data HelloWorld = HelloWorld mkYesod "HelloWorld" [parseRoutes| / HomeR GET |] instance Yesod HelloWorld getHomeR :: Handler RepHtml getHomeR = defaultLayout [whamlet|Hello World!|] main :: IO () main = warpDebug 3000 HelloWorld

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• Adding series programatically to a Dundas TreeMap

  - by starskythehutch

  I'm trying to programatically add a series to a Dundas TreeMap but I'm getting a Object reference not set to an instance of an object. error. This error looks to be a bug in Dundas, but I was wondering if anyone has tried/managed to do this? If I add the series in declaratively then at all works fine.

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• What is sender?

  - by marty

  I can't find this answer anywhere. What does it mean when there's a sender parameter in a method header? Does it represent the instance that called it, or the method that called it?

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• Add a datatable to a data set

  - by Jibu P C_Adoor

  Hii... I have a data table 'dt1' that is belongs to 'ds1'. I have created another instance of dataset 'ds2' and try to add the datatable 'dt1' to 'ds2'. Now i got one exception 'DataTable already belongs to another data set'. Is there any reliable way to add the dt1 to ds2?

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• Is it possible to do DNS-based ACLs on a Cisco ASA?

  - by pickles

  Short of using static IP addresses, is it possible to have a Cisco ASA use a DNS name rather than an IP address? For instance, if I want to limit a host in the DMZ to access only one particular web service, but that web service might be globally load balanced or using DynDNS or cloud, how can the ACL be expressed so that a fixed IP address isn't used and the admin doesn't have to keep opening and closing down IP addresses?

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• Explicitly accessing banked registers on ARM

  - by Demiurg

  According to the ARM manual, it should be possible to access the banked registers for a specific CPU mode as, for instance, "r13_svc". When I try to do this gcc yells at me with the following error: immediate expression requires a # prefix -- `mov r2,sp_svc' What's wrong?

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• Error when deploying app to the device in iphone

  - by Rafael

  Hi, I'm developing an app with SDK 3.1.2 and it runs in the simulator, but when I try to deploy it in the device it arise de following error: 2010-06-17 17:40:39.592 MyApp[2143:207] *** -[__NSCFDate dateInformation]: unrecognized selector sent to instance 0x21e6a0 2010-06-17 17:40:39.608 MyApp[2143:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSCFDate dateInformation]: Why this doesn't happen for the simulator? Thanks in advanced for your help.

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• Can I get Visual Studio to provide Intellisense and syntax coloring for Less Css ?

  - by driis

  I am experimenting with Less Css, and I am using Visual Studio 2010. It would be nice if the editor provided support for syntax highlighting and Intellisense for Less, for instance coloring and suggesting variables. What are my options to get that to work ? Do I need to write a plugin for it, or how would one go about adding this to VS ? Does anything exist for this already ?

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• rotate image with php - any degree

  - by Luis

  How to rotate an image with PHP, any degree, without having the filled space? For instance, if I rotate an image 10 degrees, the image rotates fine but the container around (square) gets filled with black. Is it possible to get rid of this, when for example merging 2 images?

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• How to save a custom cookie

  - by xRobot

  Is there a way to save a cookie that is available on other site ? For instance I have my django project on http://www.example.com and I want that django saves a cookies for a site written in PHP on http://site.Idontknow.com . Is this possible ?

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• How can I delete duplicated users in django?

  - by Catalina

  Hi guys, I need to delete duplicate users in django (by duplicate I mean two or more users with the same email). If your instance there are three records like this: id email 3 [email protected] 56 [email protected] 90 [email protected] I need to delete records 56 and 90 and leave the oldest record id - 3 Is there a way to quickly do this. Thanks :)

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• KeyNotFound Exception in Dictionary(of T)

  - by C Patton

  I'm about ready to bang my head against the wall I have a class called Map which has a dictionary called tiles. class Map { public Dictionary<Location, Tile> tiles = new Dictionary<Location, Tile>(); public Size mapSize; public Map(Size size) { this.mapSize = size; } //etc... I fill this dictionary temporarily to test some things.. public void FillTemp(Dictionary<int, Item> itemInfo) { Random r = new Random(); for(int i =0; i < mapSize.Width; i++) { for(int j=0; j<mapSize.Height; j++) { Location temp = new Location(i, j, 0); int rint = r.Next(0, (itemInfo.Count - 1)); Tile t = new Tile(new Item(rint, rint)); tiles[temp] = t; } } } and in my main program code Map m = new Map(10, 10); m.FillTemp(iInfo); Tile t = m.GetTile(new Location(2, 2, 0)); //The problem line now, if I add a breakpoint in my code, I can clearly see that my instance (m) of the map class is filled with pairs via the function above, but when I try to access a value with the GetTile function: public Tile GetTile(Location location) { if(this.tiles.ContainsKey(location)) { return this.tiles[location]; } else { return null; } } it ALWAYS returns null. Again, if I view inside the Map object and find the Location key where x=2,y=2,z=0 , I clearly see the value being a Tile that FillTemp generated.. Why is it doing this? I've had no problems with a Dictionary such as this so far. I have no idea why it's returning null. and again, when debugging, I can CLEARLY see that the Map instance contains the Location key it says it does not... very frustrating. Any clues? Need any more info? Help would be greatly appreciated :)

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• Workflow State not changing in asp.net

  - by shail

  hi i m trying to change the state for workflow from one state to another on button click its working fine with windows but not with web application and its instance id does not persist i have used SqlWorkflowPersistenceService also. what can b the solution for this. thanks

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• Floating point numbers in XML

  - by Jamie

  what is the best way to handle floating point numbers in XML? If I have, for instance: double a = 123.456; and I would like to keep it as <A> 123.456 </A> simply using ... myDoc.createTextNode(a.ToString()); is fine? Or should it be done with some Globalization stuff to make it region-independent?

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• Does UIScrollView have a special content view for making the scrolling possible?

  - by mystify

  I wonder if UIScrollView has got an "hidden" subview acting as an container for the content. If I scroll a scroll view, is that content view moved up/down in the scroll view? Or is the scrolling offset applied to the bounds of that UIScrollView instance? Or: Does UIScrollView use an additional view as container, or is all content added directly to the view? The documentation doesn't tell much about wether it has a content container or not.

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• Passing static parameters to a class

  - by koumides

  All, As far as I know you can can't pass static parameters to a static constructor in C#. However I do have 2 static parameters I need to initialize before I create an instance of a class. How do I go about it ? Thanks, M

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• How can I get WorkbookPart from WorkSheet ?

  - by Ant

  Hi, I am trying to create Excel file using OpenXML SDK. I have one situation to get WorkBookPart from WorkSheet instance. How can I get it? Thanks. Ant.

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• What version of Tomcat is contained in the Websphere Application Server 7

  - by Jens Schauder

  As far as I know the Websphere Application Server contains a Tomcat instance as servlet container. I'd like to know which version of Tomcat this is in the Websphere 7.0 Version, since we are planning to use Tomcat for development, but WAS for deployment. Obviously we would like to use the matching version.

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• initializing a readonly property. Object c

  - by tak

  i was trying to create a property which is readonly. i wanted to initialize with a value from the class creating an instance of this class.e.g @property (readonly) NSString *firstName; And wanted to initialize it like -(id)initWithName:(NSString *)n{ self.firstName = n; } Once i do this, this compiler shows an error that the readonly property cannot be assigned. So how can i do this?

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