Search Results

Search found 45316 results on 1813 pages for 'class literals'.

Page 789/1813 | < Previous Page | 785 786 787 788 789 790 791 792 793 794 795 796  | Next Page >

  • Custom Collection Implementing IEnumerable

    - by Burnzy
    I know that technically, an Interface is used for reading and not writting or editing however, I want to add an add and addrange function to the following class, here is what I currently have which is not working public class HrefCollection : IEnumerable<Href> { private IEnumerable<Href> hrefs; public IEnumerable<Href> Add( Href href ) { yield return href; } public IEnumerable<Href> AddRange( List<Href> hrefs ) { foreach( Href href in hrefs ) { yield return href; } } public IEnumerator<Href> GetEnumerator() { return hrefs.GetEnumerator(); } System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { return hrefs.GetEnumerator(); } } I'm not quite sure how to associate the yield return with the private list. Thanks for your help!

    Read the article

  • Looking for some help with GWT/Derby in Eclipse

    - by Ricky
    I'm attempting to learn AJAX via this site. I've made it down to the section where it says "you must put the code in the onModuleLoad()" (right above listing 4). I found two areas in my Eclipse project that mention onModuleLoad(): slicr.java and the actual EntryPoint.class file in the gwt-user.jar/com.google.gwt.core.client package. When I try to add the contents of listing for to slicr.java, I get tons of cannot be resolved to a type errors and I cant add anything to EntryPoint.class as it appears to be locked from editing. I really appreciate any help someone could give me!

    Read the article

  • Are Python properties broken?

    - by jacob
    How can it be that this test case import unittest class PropTest(unittest.TestCase): def test(self): class C(): val = 'initial val' def get_p(self): return self.val def set_p(self, prop): if prop == 'legal val': self.val = prop prop=property(fget=get_p, fset=set_p) c=C() self.assertEqual('initial val', c.prop) c.prop='legal val' self.assertEqual('legal val', c.prop) c.prop='illegal val' self.assertNotEqual('illegal val', c.prop) fails as below? Failure Traceback (most recent call last): File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/unittest.py", line 279, in run testMethod() File "/Users/jacob/aau/admissions_proj/admissions/plain_old_unit_tests.py", line 24, in test self.assertNotEqual('illegal val', c.prop) File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/unittest.py", line 358, in failIfEqual (msg or '%r == %r' % (first, second)) AssertionError: 'illegal val' == 'illegal val'

    Read the article

  • 'int' object is not callable

    - by Oscar Reyes
    I'm trying to define a simply Fraction class And I'm getting this error: python fraction.py Traceback (most recent call last): File "fraction.py", line 20, in <module> f.numerator(2) TypeError: 'int' object is not callable The code follows: class Fraction(object): def __init__( self, n=0, d=0 ): self.numerator = n self.denominator = d def get_numerator(self): return self.numerator def get_denominator(self): return self.denominator def numerator(self, n): self.numerator = n def denominator( self, d ): self.denominator = d def prints( self ): print "%d/%d" %(self.numerator, self.denominator) if __name__ == "__main__": f = Fraction() f.numerator(2) f.denominator(5) f.prints() I thought it was because I had numerator(self) and numerator(self, n) but now I know Python doesn't have method overloading ( function overloading ) so I renamed to get_numerator but that's not the problems. What could it be?

    Read the article

  • Thread local storage with __declspec(thread) fails in C++/CLI

    - by EFrank
    I'm working on a project where we mix .NET code and native C++ code via a C++/CLI layer. In this solution I want to use Thread Local Storage via the __declspec(thread) declaration: __declspec(thread) int lastId = 0; However, at the first access of the variable, I get a NullReferenceException. To be more precise, the declaration is done within a ref class (a .NET class implemented in C++/CLI). I have already read something about __declspec(thread) does not work with delay loaded DLLs. Am I using delay loaded DLLs automatically if I use .NET?

    Read the article

  • Nhibernate ValueType Collection as delimited string in DB

    - by JWendel
    Hi I have a legacy db that I am mapping with Nhibernate. And in several locations a list och strigs or domain objects are mapped as a delimited string in the database. Either 'string|string|string' in the value type cases and like 'domainID|domainID|domainID' in the references type cases. I know I can create a dummy property on the class and map to that fields but I would like to do it in a more clean way, like when mapping Enums as their string representation with the EnumStringType class. Is a IUserType the way to go here? Thanks in advance /Johan

    Read the article

  • html css image alignment

    - by computerpro007
    Hi All, I have a question regarding image alignment with CSS. For example I have created a css class as below: .link { background: url("images/image1.gif") scroll right; } and below is the markup <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <title>Untitled Document</title> <p class="link">This is a link</p> </head> <body> </body> </html> When I check in the browser I get the image on the text. I want it after the text i mean This is a link (this is where I want the image to appear)

    Read the article

  • Creating a new coloumn for date info with specific date format

    - by Ayan
    Dear All I am working with a file which has few years data and I am trying to create an aditional coloumn that reads the year and month info from the date coloumn (e.g. 01/01/1997 12:00) and create a new coloumn with month and year together(e.g. Jan-97). I am not sure how to proceed with this but what I am trying to code is the coloumn with name "new_date" in the following picture: my sample data = > dput(df) structure(list(date = structure(c(1L, 4L, 7L, 2L, 5L, 8L, 3L, 6L, 9L), .Label = c("01/01/1997 12:00", "01/01/1998 15:00", "01/01/1999 18:00", "01/02/1997 13:00", "01/02/1998 16:00", "01/02/1999 19:00", "01/03/1997 14:00", "01/03/1998 17:00", "01/03/1999 19:00"), class = "factor"), value = c(29L, 31L, 42L, 42L, 52L, 61L, 57L, 55L, 56L)), .Names = c("date", "value"), row.names = c(NA, -9L), class = "data.frame") I would really appreciate if you could advise me about how should I proceed with this, Many thanks, Ayan

    Read the article

  • XNA Music mixing real-time

    - by Adam L. S.
    I've created a "format" to store segments of music (prelude part, repeated part, ending part) and time information for these segments (offset, scored length) so I can mix it up in real-time as if it were one piece of music, while repeating the repeated part (optionally) indefinitely. This way, the segments can store decay where the next segment is played, while the previous one is finished. (I've created a player for this in Java, and used the Clip class.) I wanted this format, so I can provide a finite length music (for a jukebox feature), while I play infinite length music in-games. However, when I wanted to code a class in XNA that manages this "format" I've noticed, that there is no obvious way to play "Songs" simultaneously/overlapped. How can I do this/what is the best practice, not leaving the XNA framework? (I don't want to create infinite play-lists.)

    Read the article

  • Why an object declared in method is subject to garbage collection before the method returns?

    - by SiLent SoNG
    Consider an object declared in a method: public void foo() { final Object obj = new Object(); // A long run job that consumes tons of memory and // triggers garbage collection } Will obj be subject to garbage collection before foo() returns? UPDATE: Previously I thought obj is not subject to garbage collection until foo() returns. However, today I find myself wrong. I have spend several hours in fixing a bug and finally found the problem is caused by obj garbage collected! Can anyone explain why this happens? And if I want obj to be pinned how to achieve it? Here is the code that has problem. public class Program { public static void main(String[] args) throws Exception { String connectionString = "jdbc:mysql://<whatever>"; // I find wrap is gc-ed somewhere SqlConnection wrap = new SqlConnection(connectionString); Connection con = wrap.currentConnection(); Statement stmt = con.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY); stmt.setFetchSize(Integer.MIN_VALUE); ResultSet rs = stmt.executeQuery("select instance_id, doc_id from crawler_archive.documents"); while (rs.next()) { int instanceID = rs.getInt(1); int docID = rs.getInt(2); if (docID % 1000 == 0) { System.out.println(docID); } } rs.close(); //wrap.close(); } } After running the Java program, it will print the following message before it crashes: 161000 161000 ******************************** Finalizer CALLED!! ******************************** ******************************** Close CALLED!! ******************************** 162000 Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: And here is the code of class SqlConnection: class SqlConnection { private final String connectionString; private Connection connection; public SqlConnection(String connectionString) { this.connectionString = connectionString; } public synchronized Connection currentConnection() throws SQLException { if (this.connection == null || this.connection.isClosed()) { this.closeConnection(); this.connection = DriverManager.getConnection(connectionString); } return this.connection; } protected void finalize() throws Throwable { try { System.out.println("********************************"); System.out.println("Finalizer CALLED!!"); System.out.println("********************************"); this.close(); } finally { super.finalize(); } } public void close() { System.out.println("********************************"); System.out.println("Close CALLED!!"); System.out.println("********************************"); this.closeConnection(); } protected void closeConnection() { if (this.connection != null) { try { connection.close(); } catch (Throwable e) { } finally { this.connection = null; } } } }

    Read the article

  • How to auto-include all headers in directory

    - by JRL
    I'm going through exercises of a C++ book. For each exercise I want to minimize the boilerplate code I have to write. I've set up my project a certain way but it doesn't seem right, and requires too many changes. Right now I have a single main.cpp file with the following: #include "e0614.h" int main() { E0614 ex; ex.solve(); } Each time I create a new class from an exercise, I have to come and modify this file to change the name of the included header as well as the class i'm instantiating. So my questions are: Can I include all headers in the directory so at least I don't have to change the #include line? Better yet, can I rewrite my solution so that I don't even have to touch main.cpp, without having one file with all the code for every exercise in it?

    Read the article

  • cant use Activerecord find method with associations.

    - by fenec
    here are my models: #game class Game < ActiveRecord::Base #relationships with the teams for a given game belongs_to :team_1,:class_name=>"Team",:foreign_key=>"team_1_id" belongs_to :team_2,:class_name=>"Team",:foreign_key=>"team_2_id" def self.find_games(name) items = Game.find(:all,:include=>[:team_1,:team_2] , :conditions => ["team_1.name = ?", name] ) end end #teams class Team < ActiveRecord::Base #relationships with games has_many :games, :foreign_key =>'team_1' has_many :games, :foreign_key =>'team_2' end When i execute Game.find_games("real") i get : ActiveRecord::StatementInvalid: SQLite3::SQLException: no such column: team_1.name How can i fix the problem i thought that using :include would fix the problem.

    Read the article

  • Dynamic filling WrapPanel buttons from DB, setting the event handlers

    - by Anry
    I have a table: I'm using NHibernate. The class of entity: public class PurchasedItem { public virtual int Id { get; set; } public virtual Product Product { get; set; } public virtual int SortSale { get; set; } } I want to get all the records table PurchasedItems (my method returns an IList ). Records are sorted in descending order (column SortSale). How to fill WrapPanel buttons from the list IList ? For each button assign the event handler. By pressing the button display a message with the name of the product.

    Read the article

  • Automapping to EntityKeys in Entity Framework

    - by CodeGrue
    Does anyone have a technique to automap (using Automapper) references to child entities. So say I have a ViewModel: class AddressModel { int Id; string Street; StateModel State; } class StateModel { int Id; string Name; } And I pass this into a repository to map to equivalent entities in Entity Framework. When Automapping, I want it to automap AddressModel.State.ID to the EntityKey of AddressEntity.StateReference. So hand crafted code would look like this: addressEntity.Id = AddressModel.Id; addressEntity.Street = AddressModel.Street addressEntity.StateReference.EntityKey = new EntityKey("MyDB.States", "Id", AddressModel.State.Id); Obviously, when automapper tries to assign an Address.State.Id to the equivalent in EF, an exception is thrown.

    Read the article

  • 'Why' and 'Where' Generics is actually used?

    - by NLV
    Hi all I know that generics are used to achieve type safety and i frequently read that they are largely used in custom collections. But why actually do we need to have it generic? For example, Why cant i use string[] instead of List<string> Lets consider i declare generic class and it has a property X T x; If i provide a method for the class which does x = x + 1; what does it mean actually? I dono what T is actually going to be and i dono what x = x + 1 going to perform actually? If i'm not able to do my own manipulations in my methods how the generics are going to be help me anyway? I've already studied lot of bookish answers. It would be much appreciated if any one can provide some clear insights in this. Regards NLV

    Read the article

  • Animating inline elements with JQuery

    - by rnielsen
    I am trying to show and hide an inline element (eg a span) using jquery. If I just use toggle(), it works as expected but if I use toggle("slow") to give it an animation, it turns the span into a block element and therefore inserts breaks. Is animation possible with inline elements? I would prefer a smooth sliding if possible, rather than a fade in. Thanks. <script type="text/javascript"> $(function(){ $('.toggle').click(function() { $('.hide').toggle("slow") }); }); </script> <p>Hello <span class="hide">there</span> jquery</p> <button class="toggle">Toggle</button>

    Read the article

  • how to get the type of a deferred template parameter

    - by smerlin
    Is there a way to get the defered type of a class template parameter ? template <class TPtr> struct foo { typedef TPtr ptr_type; typedef ??? element_type; /* shall be the type of a deferred TPtr*/ }; so foo<const char*>::element_type results in const char, and foo<std::vector<int>::iterator_type>::element_type results in int. i am aware of that i can use the value_type typedef for c++ iterators (like std::vector<int>::iterator_type::value_type), but raw pointers havent got a value_type typedef, so i am out of luck there.

    Read the article

  • Server Emulator Design Pattern

    - by adisembiring
    I wanna build server socket emulator, but I want implement some design pattern there. I will described my case study that I have simplified like these: My Server Socket will always listen client socket. While some request message come from the client socket, the server emulator will response the client through the socket. the response is response code. '00' will describe request message processed successfully, and another response code expect '00' will describe there are some error while processing the message request. IN the server there are some UI, this UI contain check response parameter such as. response code timeout interval While the server want to response the client message, the response code taken from input parameter response form UI check the timeout interval, it will create sleep thread and the interval taken from timeout interval input from UI. I have implement the function, but I create it in one class. I feel it so sucks. Can you suggest me what class / interface that I must create to refactor my code.

    Read the article

  • NullPointerException when trying to run an applet of multiple classes

    - by Chad
    I'm trying to display an applet in an html page. I've had success doing this in the past, but now that I have more than one class in the applet, I seem to get an error every time I try to load the applet in an html page. For a bit, I was writing the html page by hand, but then I realized the applet viewer in netbeans (the IDE I'm coding in) created an html page for you, which is the same as the one I was coding. The application runs error-free when in the applet viewer, but the following message is displayed when I try to run it in the html page: java.lang.NullPointerException at sun.plugin2.applet.Plugin2Manager.findAppletJDKLevel(Unknown Source) at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source) at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Exception: java.lang.NullPointerException I tested another small, one class applet and it ran fine in the html page under the same conditions. Any ideas what may be wrong?

    Read the article

  • "Temporary object" warning - is it me or the compiler?

    - by Roddy
    The following snippet gives the warning: [C++ Warning] foo.cpp(70): W8030 Temporary used for parameter '_Val' in call to 'std::vector<Base *,std::allocator<Base *> >::push_back(Base * const &)' .. on the indicated line. class Base { }; class Derived: public Base { public: Derived() // << warning disappears if constructor is removed! { }; }; std::vector<Base*> list1; list1.push_back(new Base); list1.push_back(new Derived); // << Warning on this line! Compiler is Codegear C++Builder 2007. Oddly, if the constructor for Derived is deleted, the warning goes away... Is it me or the compiler?

    Read the article

  • C++ Virtual Constructor, without clone()

    - by Julien L.
    I want to perform "deep copies" of an STL container of pointers to polymorphic classes. I know about the Prototype design pattern, implemented by means of the Virtual Ctor Idiom, as explained in the C++ FAQ Lite, Item 20.8. It is simple and straightforward: struct ABC // Abstract Base Class { virtual ~ABC() {} virtual ABC * clone() = 0; }; struct D1 : public ABC { virtual D1 * clone() { return new D1( *this ); } // Covariant Return Type }; A deep copy is then: for( i = 0; i < oldVector.size(); ++i ) newVector.push_back( oldVector[i]->clone() ); Drawbacks As Andrei Alexandrescu states it: The clone() implementation must follow the same pattern in all derived classes; in spite of its repetitive structure, there is no reasonable way to automate defining the clone() member function (beyond macros, that is). Moreover, clients of ABC can possibly do something bad. (I mean, nothing prevents clients to do something bad, so, it will happen.) Better design? My question is: is there another way to make an abstract base class clonable without requiring derived classes to write clone-related code? (Helper class? Templates?) Following is my context. Hopefully, it will help understanding my question. I am designing a class hierarchy to perform operations on a class Image: struct ImgOp { virtual ~ImgOp() {} bool run( Image & ) = 0; }; Image operations are user-defined: clients of the class hierarchy will implement their own classes derived from ImgOp: struct CheckImageSize : public ImgOp { std::size_t w, h; bool run( Image &i ) { return w==i.width() && h==i.height(); } }; struct CheckImageResolution; struct RotateImage; ... Multiple operations can be performed sequentially on an image: bool do_operations( std::vector< ImgOp* > v, Image &i ) { std::for_each( v.begin(), v.end(), /* bind2nd(mem_fun(&ImgOp::run), i ...) don't remember syntax */ ); } int main( ... ) { std::vector< ImgOp* > v; v.push_back( new CheckImageSize ); v.push_back( new CheckImageResolution ); v.push_back( new RotateImage ); Image i; do_operations( v, i ); } If there are multiple images, the set can be split and shared over several threads. To ensure "thread-safety", each thread must have its own copy of all operation objects contained in v -- v becomes a prototype to be deep copied in each thread.

    Read the article

  • Android GridView - How to change a bitmap dynamically?

    - by Alborz
    Hello I have a gridView which I use to show some pictures on (small thumb of diffrent levels). When the user finishes one level, I would like to change the thumb for that level. (Somehow show that it has been completed). I created two thumbs for each level. One is the original and one that shows that the level is completed. But how can i change the source of the images? The code which I use to draw the images looks like this. The main activity: /** Called when the activity is first created. */ public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.maps); GridView gridview = (GridView) findViewById(R.id.gridview); gridview.setAdapter(new ImageAdapter(this)); gridview.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View v, int position, long id) { //Open the map which was clicked on, if there is one if(position+1 > 1){ Toast.makeText(maps.this, "Level " + (position+1) + " is not yet available!", Toast.LENGTH_SHORT).show(); }else{ Toast.makeText(maps.this, "Opening Level " + (position+1), Toast.LENGTH_SHORT).show(); Intent myIntent = new Intent(v.getContext(), Tutorial2D.class); startActivity(myIntent); } } }); } The ImageAdapter Class: public class ImageAdapter extends BaseAdapter { private Context mContext; public ImageAdapter(Context c) { mContext = c; } public int getCount() { return mThumbIds.length; } public Object getItem(int position) { return null; } public long getItemId(int position) { return 0; } // create a new ImageView for each item referenced by the Adapter public View getView(int position, View convertView, ViewGroup parent) { ImageView imageView; if (convertView == null) { // if it's not recycled, initialize some attributes imageView = new ImageView(mContext); imageView.setLayoutParams(new GridView.LayoutParams(85, 85)); imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); imageView.setPadding(8, 8, 8, 8); } else { imageView = (ImageView) convertView; } //Changing imageView.setImageResource(mThumbIds[position]); return imageView; } // references to our images private Integer[] mThumbIds = { R.drawable.map1, R.drawable.map2, R.drawable.map3, R.drawable.map4, R.drawable.map5, R.drawable.map6, R.drawable.map7, R.drawable.map8, R.drawable.map9, R.drawable.map10, R.drawable.map11, R.drawable.map12, R.drawable.map13, R.drawable.map14, R.drawable.map15, R.drawable.map16, R.drawable.map17, R.drawable.map18, R.drawable.map19 }; }

    Read the article

  • Including a NSUserDefault password test in 1st Tab.m to load a loginView gives eror?

    - by Michael Robinson
    I have a name and password in NSUserDefaults for login. I have this in my 1stTab View.m class to test for presence and load a login/signup loginView.xib modally if there is no password or name stored in the app. Here is the pulling of the defaults: -(void)refreshFields { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; usernameLabel.text = [defaults objectForKey:kUsernameKey]; passwordLabel.text = [defaults objectForKey:kPasswordKey]; { Here is the Test: - (void)viewDidAppear:(BOOL)animated { [self refreshFields]; [super viewDidAppear:animated]; if ([usernameLabel.text length] == 0 || [passwordLabel.text length] == 0) { LoginViewController * vc = [[[LoginViewController alloc] initWithNibName:@"LoginView" bundle:nil] autorelease]; [self presentModalViewController:vc animated: false]; } else { [[self tableView ]reloadData]; } } Thanks in advance, I'm getting this error in the console: * Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key usernameLabel.'

    Read the article

  • Symfony2 : How to make the php_intl extension available for Symfony2?

    - by Miles M.
    I'm trying to follow this documentation on Symfony : http://symfony.com/doc/current/book/forms.html ok so here is my thing, I've externalised my form and created a specific form class for handling the process and being able to reuse it. So what happen when I submit the form, whatever the info are okay or not for my class, I get this fatal Error : Fatal error: Call to a member function setAttribute() on a non-object in C:\Program Files (x86)\wamp\www\QNetworks\vendor\symfony\src\Symfony\Component\Form\Extension\Core\DataTransformer\NumberToLocalizedStringTransformer.php on line 130 Call Stack I'm running with php 5.3.9 and my intl extension is installed and activated BUT when I run the app/check.php command I see : [[WARNING]] Checking that the intl extension is available: FAILED * Install and enable the intl extension (used for validators) * So I don't understand what the problem with this extension. Should I reinstall it ? When I go here : http://php.net/manual/en/intl.requirements.php I see tht i can install the PECL or the ICU library, but i don't know if I should and if there is any relation with my problem .. Thank for your help !!

    Read the article

  • Exposing classes inside modules within a Python package directly in the package's namespace

    - by Richard Waite
    I have a wxPython application with the various GUI classes in their own modules in a package called gui. With this setup, importing the main window would be done as follows: from gui.mainwindow import MainWindow This looked messy to me so I changed the __init__.py file for the gui package to import the class directly into the package namespace: from mainwindow import MainWindow This allows me to import the main window like this: from gui import MainWindow This looks better to me aesthetically and I think it also more closely represents what I'm doing (importing the MainWindow class from the gui "namespace"). The reason I made the gui package was to keep all the GUI stuff together. I could have just as easily made a single gui module and stuffed all the GUI classes in it, but I think that would have been unmanageable. The package now appears to work like a module, but allows me to separate the classes into their own modules (along with helper functions, etc.). This whole thing strikes me as somewhat petty, I just thought I'd throw it out there to see what others think about the idea.

    Read the article

< Previous Page | 785 786 787 788 789 790 791 792 793 794 795 796  | Next Page >