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• I Can Not Use Session In Page _Load And I Got Bellow Error

  - by LostLord

  hi my dear friends .... why i got this error : (Object reference not set to an instance of an object.) when i put this code in my page_load.: protected void Page_Load(object sender, EventArgs e) { BackEndUtils.OverallLoader(); string Teststr = Session["Co_ID"].ToString(); } ========================================================================== this session is made when user logins to my web site and this session works in other areas... thanks for your attention

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• how to write a constructor...

  - by Nima

  is that correct to write a constructor like this? class A { A::A(const A& a) { .... } }; if yes, then is it correct to invoke it like this: A* other; ... A* instance = new A(*(other)); if not, what do you suggest? Thanks

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• How to make my URL mapping case insensitive?

  - by fabien7474

  Grails, by default, is case-sensitive when mapping URL to controller actions or views. For instance, www.mywebsite.com/book/list will work BUT www.mywebsite.com/Book/list will return a 404 page. What can I do (code snippets are welcomed) to make my URL case-insensitive (i.e. www.mywebsite.com/Book/list being a valid url) ?

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• Get position in class hierarchy

  - by jean

  Is the a way to get the number of ancestors for an instance of class? E.g. a class of type UITouch would be of level 2 as it inherits from NSObject.

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• Question on First Order Logic formula

  - by none

  Hi, Can someone validate the following. I am supposed to 'write a formula asserting that for every number there's a unique next number...true for integers for instance' L(x,y) means x is smaller than y the intended Domain is the Integer numbers Can I give ∀x ∀y [ x<y ⇒ ( ∃z : z<x ∨ y<z ) ] Thanks

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• How to tell cell phone to install midlet in applications folder?

  - by Gatis

  I'd like to suggest where the phone should install the j2me app. For instance, on Nokia phones, it always install them in games folder. Is there a way to suggest a destination folder? Either in .jad file or in MANIFEST file?

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• How to import a svn repository underneath a git repository?

  - by Thiago Moreira

  Hi there, I have a svn repository that I migrated to git using the tool svn2git. Now I would like to push this git layout to a remote repository underneath an existing directory. But, I would like to keep the svn history (tags and branches). For instance: Git remote repository layout: git-repository/dirA git-repository/dirB git-repository/dirC/svn-repository-migrated-to-git Makes sense? Is it possible?? Thanks

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• interactive lua: command line arguments

  - by mr calendar

  I wish to do lua prog.lua arg1 arg2 from the command line Inside prog.lua, I want to say, for instance print (arg1, arg2, '\n') Lua doesn't seem to have argv[1] etc and the methods I've seen for dealing with command line arguments seem to be immature and / or cumbersome. Am I missing something?

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• How to place embedded video player so that it displays under pop out menu?

  - by Deshiknaves

  I have big element at the top of the webpage that sides down with jQuery when a button is clicked. However, if the first post on the blog is a flash video, it shows up on top of the menu. Z-index doesn't help in this instance. Any help would be greatly appreciated.Thanks.

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• Can't use method return value in write context--how to fix for include_once?

  - by Bill Paetzke

  I'm getting this error in CodeIgniter when trying to load the email library: Can't use method return value in write context It's happening on line 827 of Loader.php in [codeigniter root]/system/libraries/Loader.php include_once($filepath); where $filepath equals "/var/www/system/libraries/Email.php" I called it like this in another php file: $this->load->library('email'); where $this is the CodeIgniter instance. According to the CodeIgniter email doc page, I'm doing it right. But it's not working...

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• Flex Text height

  - by kevin

  How can you get the height of the Text component that's been created dynamically from ActionScript. For instance, if you have something like: var temp:Text = new Text; temp.width = 50; temp.text = "Simple text"; how to get height of temp?

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• Installation doesn't recognize SQL server 2008 saying Server components not found

  - by Aarthi

  Please answer these 2 questions: Our installation is not recognising the SQL server 2008 and if we try to create a DB, its telling Server components not found. Please tell what may be the issue and why it's not recognising. But our installation proceeds as client installation(if i point to the same instance with DB already created) without any issues. Can we install SQL express 2005 in a machine where SQL server 2008 is already installed. Please clarify.

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• Subroutine to apply Daylight Bias to display time in local DST?

  - by vfclists

  UK is currently 1 hour ahead of UTC due to Daylight Savings Time. When I check the Daylight Bias value from GetTimeZoneInformation it is currently -60. Does that mean that translating UTC to DST means DST = UTC + -1 * DaylightBias, ie negate and add? I thought in this case for instance adding Daylight Bias to UTC is the correct operation, hence requiring DaylightBias to be 60 rather than -60.

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• Generate terminal graphics

  - by Werner

  Hi, which open source software options exist for generating terminal graphics? I mean, there is for instance the nice matplotlib, which can generate beautiful plots from data, in PNG or similar formats. But there are similar alternatives for generating just kind of ascii graphics? Thanks

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• Finding An image tag using the alt text

  - by MrJackV

  I would like to know if it was possible using Javascript to find an image tag by its alt text. For instance I have this tag: <img src="Myimage.jpg" alt="Myimage"> would there be a vay to abtain the tag by looking for the "Myimage" alt attribute?

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• HierarchicalDataTemplate Distinct leaves

  - by miguel

  I have a set of data that is structured like this: ItemA.GroupA ItemB.GroupA ItemC.GroupB ItemD.GroupC I need to present the data in a WPF Tree View like this: GroupA --- ItemA --- ItemB GroupB --- ItemC GroupC --- ItemD What XAML can I use to group the leaves by distinct value? For instance, there could be multple items in the collection which are GroupA.ItemA, however, I only want to present the node and leaf once.

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• How is thread local storage (__thread) implemented on LInux?

  - by anon

  __thread Foo foo; How is "foo" actually resolved? Does the compiler silently replace every instance of "foo" with a function call? Is "foo" stored somewhere relative to the bottom of the stack, and the compiler stores this as "hey, for each thread, have this space near the bottom of the stack, and foo is stored as "offset x from bottom of stack"" ? Insights please.

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• Creating a handle to a class' property

  - by shadeMe

  Would it be possible to create a handle ( or a tracking handle ) to a class' property ? For instance, System::Windows::Forms::CheckBox^ Box = gcnew System::Windows::Forms::CheckBox() I'd like to create a handle to its Checked property and use it to access and modify the same.

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• In Ant, copy all files from a tree of folders into a single folder?

  - by Sam Washburn

  Is it possible to use Ant to copy all the files (not folders) from a hierarchy of folders into one destination folder? For instance, I have a tree like this: res |-images | |-fg.png | +-bg.png +-sounds +-music.mp3 And I would like a result like this: data |-fg.png |-bg.png +-music.mp3 The way things are named, filename conflicts are not an issue. Is this possible to do with Ant?

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• Ringing myself using android emulator

  - by vondip

  Hi all, I am developing a small application on Google's android emulator. I am trying to figure out how I can simulate a phone call from one instance of an emulator to another (both running on my computer). Does anyone know how this can be done? Thank you very much.

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• Tomcat session stickiness in session replication

  - by rabbit

  Hi, I am having a 2 instance load balanced and session replicated tomcat 6.0.20 cluster. Should sticky_session be set to true or false for in memory session replication. http://tomcat.apache.org/connectors-doc/reference/workers.html mentions : Set sticky_session to False when Tomcat is using a Session Manager which can persist session data across multiple instances of Tomcat. where as /tomcat-6.0-doc/cluster-howto.html (Cluster Basics) mentions : Make sure that your loadbalancer is configured for sticky session mode.

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• When to use std::size_t?

  - by nhaa123

  Hi, I'm just wondering should I use std::size_t for loops and stuff instead of int? For instance: #include <cstdint int main() { for (std::size_t i = 0; i < 10; ++i) // std::size_t OK here? Or should I use, say, unsigned int instead? } In general, what is the the best practice regarding when to use std::size_t?

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• Difference between Object var() and Object* var = new Object()

  - by Puyover

  If I have an Object class named, what's the difference between create an instance just like that: Object var(); and: Object* var = new Object(); ?

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• What is the meaning of method class in the class definition in Ruby?

  - by Steven Xu

  I'm familiar with function definitions and variable declarations being in class definitions: public class MyClass { public int myvar; public void doSomething() { } } But what does it "mean" in Ruby when a method is actually called in the class definition? This happens amply in Rails, for instance: class User < ActiveRecord::Base has_many :posts end What exactly does this do (at a lower level than "it adds some methods to the class")? How would I implement such a function (e.g., one that mixes in some additional methods)?

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• Correct way to read configuration file and using configuration values

  - by Harza

  I'm reading applications .config file using .NET ConfigurationManager like it should be done, but .... Which one is most preferred option: Read config and store instance of (build in or custom) ConfigurationElement for later use Read config and store only needed values (but not instances of ConfigrationElement classes) for later use Read ConfigurationElement from config always when configuration values are needed These two things are in my mind: Performance impact in case 3 when reading config all the time Problems occuring in case 1 when using cached instances of ConfigurationElements

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