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• How to open "front camera" on android platform?

  - by Sol

  More generally, If a device has more than one camera, is there any way to initializing it? I didn't find it in android reference doc. Samsung SHW-M100S have 2 cameras. If there is no reference to use 2 cams, Any idea how samsung did..?

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• In django 1.1, how do I find a form field's max_length attribute

  - by AlexH

  I have a form that looks like this: class SampleForm(forms.Form): text = forms.CharField(max_length=100) In my django template, I want to reference the fact that the length is 100. I tried {{ form.text.max_length }} to no avail. On a related note, how do I reference this value in python?

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• How can I implement a dispatch table using Perl objects?

  - by bitbucket

  What is the syntax for the hash value for a Perl object member subroutine reference in a dispatch table? use lib Alpha; my $foo = new Alpha::Foo; $foo->bar(); my %disp_table = ( bar => ??? ); I want ??? to be the code reference for $foo->bar().

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• Delete the unwanted files and folders from destination folder as compared to source folder

  - by OM The Eternity

  I am using PHP and I need to script something like below: I have to compare two folder structure and with reference of source folder I want to delete all the files/folders present in other destination folder which do not exist in reference source folder, how could i do this?

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• mysql circular dependency in foreign key constraints

  - by Flavius

  Given the schema: What I need is having every user_identities.belongs_to reference an users.id. At the same time, every users has a primary_identity as shown in the picture. However when I try to add this reference with ON DELETE NO ACTION ON UPDATE NO ACTION, MySQL says #1452 - Cannot add or update a child row: a foreign key constraint fails (yap.#sql-a3b_1bf, CONSTRAINT #sql-a3b_1bf_ibfk_1 FOREIGN KEY (belongs_to) REFERENCES users (id) ON DELETE NO ACTION ON UPDATE NO ACTION) I suspect this is due to the circular dependency, but how could I solve it (and maintain referential integrity)?

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• Javascript (JSON) Objects: Get Parent

  - by Dänu

  Hey Guys I got some question about nested javascript objects (is it me, google or is javascript quite poorly documented?). Now, I got the following (nested) object: obj: { subObj: { 'hello world' } }; next thing I do is to reference the subobject like this: var s = obj.subObj; now what I would like to do, is to get a reference to the object obj out of the variable s. Something like: var o = s.parent; Is this somehow possible?

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• Problem migrating membershipProvider functionality from mvc1 to mvc2

  - by Jericho

  I am migrating a web app in mvc1 to mvc2. When it came down to migrating my MembershipProvider authentication I keep getting errors that MembershipProvider and MembershipCreateStatus type cannot be found. I do have the reference to System.Web which to my understanding includes the Security reference, but when I examine the the object, those types do not appear. I am just getting familiar with mvc2, if anyone has any input on this it would be extremely appreciated.

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• Rvalues in C++03

  - by DeadMG

  How can you tell whether or not a given parameter is an rvalue in C++03? I'm writing some very generic code and am in need of taking a reference if possible, or constructing a new object otherwise. Can I overload to take by-value as well as by-reference and have the rvalue returns call the by-value function? Or do I have a very sickening feeling that this is why rvalue references are in C++0x?

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• How do I search for the comma character within data stored in SQL Server?

  - by Fred

  I have some data that I needs to be searched for the comma character. example entry I need to locate in the field Citation in the Citations table: This is sometimes true, Textual Reference In the end, I'm looking to extract Textual Reference Selecting the column with the data: select Citation from Citations;

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• referencing (this) in a function

  - by Sara Chipps

  I have elements being generated by dynamic html, I would like to reference the particular href that is calling the function when one of many may be calling it. <a href="javascript:Foo(this)">Link</a> Does not work when I try to reference $(this). Is there another way to do this or do I have to make dynamic ids?

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• extract transform load

  - by mitch

  Wikipedia defines a 'typical' ETL cycle as : Cycle initiation Build reference data Extract (from sources) Validate Transform (clean, apply business rules, check for data integrity, create aggregates or disaggregates) Stage (load into staging tables, if used) Audit reports (for example, on compliance with business rules. Also, in case of failure, helps to diagnose/repair) Publish (to target tables) Archive Clean up ..What is meant by 'Build reference data'?

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• In C#, what happens when you call an extension method on a null object?

  - by tpower

  Does the method get called with a null value or does it give a null reference exception? MyObject myObject = null; myObject.MyExtensionMethod(); // <-- is this a null reference exception? If this is the case I will never need to check my 'this' parameter for null?

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• Does the compiler optimize the function parameters passed by value?

  - by Naveen

  Lets say I have a function where the parameter is passed by value instead of const-reference. Further, lets assume that only the value is used inside the function i.e. the function doesn't try to modify it. In that case will the compiler will be able to figure out that it can pass the value by const-reference (for performance reasons) and generate the code accordingly? Is there any compiler which does that?

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• Facebook API, export group wall entries

  - by Guy David

  After trying to find a reference to an API/tutorial to such thing, I have come here. I would like to scan a specific group wall, pulling all posts from it, with PHP or C#. In the end, I would like to have a nested-array containing each posts, with the next details: An array of the related comments Likes Views Obviously, I don't ask for any code, only a reference to the related API I will need to use. EDIT: If this is not possible, should I consider cURL as an option?

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• Target Framework Mismatch

  - by Si Keep

  When adding a reference to a project I sometimes see the message... "The Target Framework version for the project is higher than the current project Target Framework version. Would you like to add this reference to your project anyway?" I understand what the message is indicating but can anyone explain what issues might arise from saying 'Yes'?

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• Excel macro to change location of .cub files used by pivot tables? (to allow .xls files that depend

  - by Rory

  I often use Excel with pivot tables based on .cub files for OLAP-type analysis. This is great except when you want to move the xls and you realise internally it's got a non-relative reference to the location of the .cub file. How can we cope with this - ie make it convenient to move around xls files that depend on .cub files? The best answer I could come up with is writing a macro that updates the pivot tables' reference to the .cub file location....so I'll pop that in an answer.

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• how to get a part of a video

  - by George2

  Hello everyone, I am using VSTS 2008 + C# + .Net 3.5 on Windows 7. I want to use Expression Encoder 3 to get a part of a video (original video in wmv format), in more details, in more details, I want to get the beginning 30 seconds of video (and save the 30-second video into another wmv file), and want to get the last 30 seconds of video (and save the 30-second video into another wmv file). Any reference code? I did not find MSDN provides too much reference sample code. thanks in advance, George

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• How to manage a BorderLayout with generic JPanel()

  - by Nick G.

  Im not sure how to reference to JPanel when it was declared like this, I had someone else help me on JPanels and this is the code he used: final JFrame frame = new JFrame("CIT Test Program"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setPreferredSize(new Dimension(350, 250)); frame.add(new JPanel() {{ Not sure how to reference to JPanel to use BorderLayout. How would I go about doing this?

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• How to create ActiveX DLL in Visual C++

  - by Eric Lavitsky

  Is there a tutorial/reference for creating an ActiveX DLL in Visual Studio 2008 C++ ? I've got a DLL built with the DLLRegisterServer/UnregisterServer, and it's registered, but I'm having a little trouble figuring out what name to use to reference it (from a vbscript) and how to make sure my functions are exported correctly. Do I have to put my functions in a special class? Thanks!

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• C++ class pointer

  - by JHollanti

  I know that you can get a reference to a static method like this: typedef void (*pointer)(); pointer p = &MyClass::MyMethod; But is there a way to get a reference to the class itself?

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• How to serialize a Linq to Sql object graph without hiding the child's "Parent" member

  - by Richard B

  Without hiding the Child object's reference to the Parent object, has anyone been able to use an XmlSerializer() object to move a Linq to SQL object to an XML document, or is the only appropriate way of handling this to create a custom serialization/deserialization class to handle moving the data to/from the xml document? I don't like the idea of hiding the child object's reference to the parent object is why I'm asking. Thx.

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• Why was the definition of a variable changed in the latest C++0x draft?

  - by FredOverflow

  n3035 says: A variable is introduced by the declaration of an object. The variable's name denotes the object. n3090 says: A variable is introduced by the declaration of a reference other than a non-static data member or of an object. The variable's name denotes the reference or object. I wonder what motivated this change. Does it have to do with rvalue references?

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• how to use subsonic generated files?

  - by sam

  Hi Guys, I have Visual 2010, I am trying to generate dal from my database. I create a classlibrary project I add reference to Subsonic I add reference to mysql create generated file in directory I add a App.config file and fill it as this: I create the external tools button and run it, it generates the CS files, but doesnt appear in generate files, what to do next to use these files in my application?? thanks

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• best scala idiom for find & return

  - by IttayD

  This is something I encounter frequently, but I don't know the elegant way of doing. I have a collection of Foo objects. Foo has a method bar() that may return null or a Bar object. I want to scan the collection, calling each object's bar() method and stop on the first one returning an actual reference and return that reference from the scan. Obviously: foos.find(_.bar != null).bar does the trick, but calls #bar twice.

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• Java Swing: Expanding TreeNode

  - by sarav

  Is there any way to get a reference to the JTree component from a DefaultMutableTreeNode? All I need is to expand the given treenode and its child nodes. I am planning to use the JTree.expandPath() but I only have the reference to the treenode. I'm new to Swing and any suggestions to achieve this are welcome.

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