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  • C# - What is root reference ?

    - by DotNetGuy
    class GCTest { static Object r1; static void Main() { r1 = new Object(); Object r2 = new Object(); Object r3 = new Object(); System.GC.Collect(); // what can be reclaimed here ? r1 = null; r3.ToString(); System.GC.Collect(); // what can be reclaimed here ? } } // code from - DonBox's Essential .Net

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  • JBoss 4.2.3 - how to find path to jar file

    - by Gribbler
    I'm getting an error in a JBOSS application: Static Method [addHeader] not found on JavaBean [class com.ppnet.webservice.WebserviceHeaderWriter] I have checked the WebserviceHeaderWriter.jar that gets deployed into JBOSS and checked it in eclipse. It looks as if it should have this method on it. I think that the JBoss application might be loading a different version of the WebserviceHeaderWriter.jar without this method on it, is there a way to check the location of the file that is getting loaded?

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  • Does the usage of interfaces slow down programs?

    - by Olga
    Is it true that interfaces slow down programs? I have heard that this is the case because during running time each during each usage of an object implementing this interface the decision has to be made which class implementing the interface this object belongs to. I am especially interested in an answer for C++, but also in general. And if this is true, some numbers would be helpful, too. Thank you very much!

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  • C# ISerializable question

    - by 5YrsLaterDBA
    I am planning to use serialization to do clone. I have to make my class ISerializable. But how about its super classes and all referenced variable classes? do I need to make them all ISerializable? If I use ISerializable. I have to implement the GetObjectData(), what I should put inside that method? leave it empty is ok?

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  • jquery clickable div

    - by dolomite
    hi, <div class="clickme"> click here </div> I want to make that div clickable and it should trigger following function: <script type="text/javascript"> $(document).ready(function(){ $("#generate").click(function(){ $("#quote p").load("script.php"); }); }); </script> how can I make that work?

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  • What does RETURN TRUE do in a php function?

    - by Imran
    I was just looking at this code and i don't understand what RETURN TRUE does or what the point of it is? Can someone please explain? class Elephpant { public $colour; public function dance() { echo "elephpant dances!\n"; return true; } } Thankyou in advance ;-)

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  • Howoto get id of new record after model.save

    - by tonymarschall
    I have a model with the following db structure: mysql> describe units; +------------+----------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +------------+----------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | name | varchar(128) | NO | | NULL | | | created_at | datetime | NO | | NULL | | | updated_at | datetime | NO | | NULL | | +------------+----------+------+-----+---------+----------------+ 7 rows in set (0.00 sec) After creating a new record an saving i can not get the id of the record. 1.9.3p194 :001 > unit = Unit.new(:name => 'test') => #<Unit id: nil, name: "test", created_at: nil, updated_at: nil> 1.9.3p194 :002 > unit.save (0.2ms) BEGIN SQL (0.3ms) INSERT INTO `units` (`created_at`, `name`, `updated_at`) VALUES ('2012-08-31 23:48:12', 'test', '2012-08-31 23:48:12') (144.6ms) COMMIT => true 1.9.3p194 :003 > unit.inspect => "#<Unit id: nil, name: \"test\", created_at: \"2012-08-31 23:48:12\", updated_at: \"2012-08-31 23:48:12\">" # unit.rb class Unit < ActiveRecord::Base attr_accessible :name end # migration class CreateUnits < ActiveRecord::Migration def change create_table :units do |t| t.string :name, :null => false t.timestamps end end end Tried this with other models and have the same result (no id). Data is definitily saved and i can get data with Unit.last Another try with Foo.id = nil # /var/www# rails g model Foo name:string invoke active_record create db/migrate/20120904030554_create_foos.rb create app/models/foo.rb invoke test_unit create test/unit/foo_test.rb create test/fixtures/foos.yml # /var/www# rake db:migrate == CreateFoos: migrating ===================================================== -- create_table(:foos) -> 0.3451s == CreateFoos: migrated (0.3452s) ============================================ # /var/www# rails c Loading development environment (Rails 3.2.8) 1.9.3p194 :001 > foo = Foo.new(:name => 'bar') => #<Foo id: nil, name: "bar", created_at: nil, updated_at: nil> 1.9.3p194 :002 > foo.save (0.2ms) BEGIN SQL (0.4ms) INSERT INTO `foos` (`created_at`, `name`, `updated_at`) VALUES ('2012-09-04 03:06:26', 'bar', '2012-09-04 03:06:26') (103.2ms) COMMIT => true 1.9.3p194 :003 > foo.inspect => "#<Foo id: nil, name: \"bar\", created_at: \"2012-09-04 03:06:26\", updated_at: \"2012-09-04 03:06:26\">" 1.9.3p194 :004 > Foo.last Foo Load (0.5ms) SELECT `foos`.* FROM `foos` ORDER BY `foos`.`id` DESC LIMIT 1 => #<Foo id: 1, name: "bar", created_at: "2012-09-04 03:06:26", updated_at: "2012-09-04 03:06:26">

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  • Call RecognizerIntent from service

    - by Tobia Loschiavo
    Hi, I am working on an Android service. I need to call RecognizerIntent from a service in order to use in the service the recognized text. I have no startActivityForResult() method in Service class so I have problem understanding how to achieve this task. Is it possible? Many thanks

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  • How can I download YouTube videos using .NET code?

    - by JMSoft
    Does anybody know the VB or C# code to programmatically download a video from YouTube? I have gone through all related questions on this site and the only code I have found (which uses the WebClient Class webclient.DownloadFileAsync) returns the text source of the video, but not the Flash video (.flv) file that needs to be downloaded? Do you know any SDK or library which can help? I have also downloaded the GoogleAPI (YouTube DLL) but have not found a way of doing it.

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  • How do I properly register the Type Library of A VB.NET COM+ Component?

    - by k_Dank
    I am looking to upgrade legacy VB6 COM+ components to VB.NET components. I have seemingly upgraded one already, called EventPackage, which has one class, IEventListener. Another, TradeOrders, Implements EventPackage.IEventListener. When attempting to build TradeOrders, I get the following Errors/Warnings; Cannot load type library for reference "EventPackage". Library not registered. (Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED)) The referenced component 'EventPackage' could not be found. Type 'EventPackage.IEventListener' is not defined. In the .vbproj, I notice this reference <COMReference Include="EventPackage"> <Guid>{0D76C094-21A6-4E04-802B-6E539F7102D7}</Guid> <Lcid>0</Lcid> <VersionMajor>2</VersionMajor> <VersionMinor>0</VersionMinor> <WrapperTool>tlbimp</WrapperTool> </COMReference> When I search the registry for this Guid, I find nothing. When using GUIDs for similar COM+ objects, I find them in HKEY_CLASSES_ROOT\CLSID\{...}\TypeLib ("..." being the GUID of the other component). When I go to the registry key name corresponding to EventPackage.IEventListener, I find that there is no \TypeLib subkey. As you might suspect, searching the reg for "0D76C094-21A6-4E04-802B-6E539F7102D7" yields no results. So I know this must be a registry problem, But I have tried seemingly every google result I have found. I have tried Regasm and regsvcs .exe's to no avail. Many pages just tell me that dragging the dll to the COM+ manager should automatically register the component. So how do I register the Type library? Details on how I made EventPackage COM+ component Ran the VB6-VB.NET wizard Then I added some lines to the assemblyinfo.vb file added Imports System.EnterpriseServices added Imports System.EnterpriseServices Imports System.Data.SqlClient <Assembly: CLSCompliant(True)> <Assembly: AssemblyKeyFileAttribute("...")> for a strong name <Assembly: Guid("...")> (Where "..." is the COM+ CLSID of the old component) I added the following to the class file IEventListener.VB Imports System.EnterpriseServices <ComClass("...")> _ (Where ... is the proper COM+ CLSID, that is the only argument) Inherits ServicedComponent changed the ID made by the Conversion wizard to the proper value (from <System.Runtime.InteropServices.ProgId("IEventListener_NET.IEventListener)> to <System.Runtime.InteropServices.ProgId("EventPackage.IEventListener")> _ Then I dragged the DLL into the COM+ manager in the proper COM+ application (although, the "Path" is not specified and only says mscoree.dll)

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  • TestNG - Factories and Dataproviders

    - by Tim K
    Background Story I'm working at a software firm developing a test automation framework to replace our old spaghetti tangled system. Since our system requires a login for almost everything we do, I decided it would be best to use @BeforeMethod, @DataProvider, and @Factory to setup my tests. However, I've run into some issues. Sample Test Case Lets say the software system is a baseball team roster. We want to test to make sure a user can search for a team member by name. (Note: I'm aware that BeforeMethods don't run in any given order -- assume that's been taken care of for now.) @BeforeMethod public void setupSelenium() { // login with username & password // acknowledge announcements // navigate to search page } @Test(dataProvider="players") public void testSearch(String playerName, String searchTerm) { // search for "searchTerm" // browse through results // pass if we find playerName // fail (Didn't find the player) } This test case assumes the following: The user has already logged on (in a BeforeMethod, most likely) The user has already navigated to the search page (trivial, before method) The parameters to the test are associated with the aforementioned login The Problems So lets try and figure out how to handle the parameters for the test case. Idea #1 This method allows us to associate dataproviders with usernames, and lets us use multiple users for any specific test case! @Test(dataProvider="players") public void testSearch(String user, String pass, String name, String search) { // login with user/pass // acknowledge announcements // navigate to search page // ... } ...but there's lots of repetition, as we have to make EVERY function accept two extra parameters. Not to mention, we're also testing the acknowledge announcements feature, which we don't actually want to test. Idea #2 So lets use the factory to initialize things properly! class BaseTestCase { public BaseTestCase(String user, String password, Object[][] data); } class SomeTest { @Factory public void ... } With this, we end up having to write one factory per test case... Although, it does let us have multiple users per test-case. Conclusion I'm about fresh out of ideas. There was another idea I had where I was loading data from an XML file, and then calling the methods from a program... but its getting silly. Any ideas?

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  • What's the best way to implement news system without using wordpress ?

    - by Tristan
    Hello, I'm a little afraid of using Wordpress because of his connotation "all made", plus my website is 100% hand coded, actually, i use the phpBB but it's not what I want cause visitors have to go out of the website to go to the forum to see the news. So how/what can I do to have my own news system management (publish/review/moderate comments).... Are there tools (i mean except WYSIWYG) / PHP class I can use to implement myself ? I hope you understand what i mean. Thank you :)

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  • What does Protected Internal means in .Net

    - by vaibhav
    Protected Means, we can access this member only in a deriving class, and internal means we can access this member in any type in the same assembly using a object. So can I consider a Protected Internal member as a public member in the same assembly. and as a protected member in the different assembly.

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  • making multiple c# file for one asp.net page

    - by Nikhil K
    For my project(in asp.net) i wrote near 1000 lines of c# code for one asp.net page.It includes so many functions.The problem is,it is going complicated while i am writing more codes on one page.How can i make multiple c# files for one asp.net page?? I tried by adding new class in VS2008.But calling a function from one file to other is making error(item is not present in current file).How can i do that??

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  • How to convert map to url query string?

    - by Ula Krukar
    Do you know of any utility class/library, that can convert Map into URL-friendly query string? Example: I have a map: - "param1"=12, - "param2"="cat" I want to get: param1=12&param2=cat. PS. I know I can easily write it myself, I am just surprised that I cannot find it anywhere (I checked Apache Commons so far).

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  • Is it possible to open a context menu from a map overlay item in android?

    - by John Nicholson
    This below code works fine opening an alert dialog. I was wondering if it's possible to open a context menu from within a map overlay class? @Override protected boolean onTap(int index) { OverlayItem item = mOverlays.get(index); AlertDialog.Builder dialog = new AlertDialog.Builder(mContext); dialog.setTitle(item.getTitle()); dialog.setMessage(item.getSnippet()); dialog.show(); return true; }

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  • How to make the value in submit button ,transparent?

    - by aquero
    Hi, I have a submit button in a form and i use a css class which sets a background image as the submit button. I need to give a value to this submit button, but i dont want it to be displayed to the user. If i set the css color property to transparent it works fine in my firefox 3.6. But the value gets displayed in ie 6 and 7. How can i solve this problem?

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  • Is there an ActiveRecord equivalent to using a nested subquery i.e. ... where NOT IN(select...) ?

    - by Snorkpete
    I have 3 models: Category, Account, and SubAccount The relations are: Accounts has_many :sub_accounts Categories has_many :sub_accounts I wanted to get a list of all Categories that are not used by a given account. My method in the Category model currently looks like: class Category < ActiveRecord::Base def self.not_used_by(account) Category.find_by_sql("select * from categories where id not in(select category_id from sub_accounts where account_id = #{account.id})") end end My question is, is there a cleaner alternative than using SQL? NB. I am currently using Rails 3(beta)

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  • XMLEncoder in java for serialization

    - by tom
    Im just wondering how i use xmlencoder to serialize ArrayList where foo is my own made class. Do i have to do anything in particular, ie define my own xml structure first and then call toString on each value in my list and write it out? Can anyone point me to a good tutorial? http://java.sun.com/products/jfc/tsc/articles/persistence4/ Thats what i have been looking at but it doesnt seem to mention what to do with non library classes. Thanks

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  • Where to Declare Structures, etc?

    - by cam
    Should all structs and classes be declared in the header file? If I declare a struct/class in a source file, what do I need to put in the header file so that it can be used in other files? Also, are there any resources that show some standard practices of C++ out there?

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