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• NHibernate Query object collection issue

  - by Mahesh

  Hi, I am new to NHibernate and need some information regarding the internal working of the engine: I have a table called Student and the design is as follows: RollNo Name City Postcode and there are 5 more columns like this. I have School class and mappings associated with it. I am querying RollNo and Name using session as given below: IQuery query = session.CreateQuery("SELECT RollNo,Name FROM Student); Executing query.List resulting in error because the query is returning object[][]. Now, I changed the query as given below: IQuery query = session.CreateQuery("FROM Student); Executing query.List on this query yeilds the desired results. But, the results contain more data than I want. Could you please let me know the query to which I can get RollNo and Name from Student and castable as Student collection. Thanks, Mahesh

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• What is the life cycle of the XNA GraphicsDevice on the Xbox 360?

  - by David Brown

  I'm working on an XNA project that doesn't use the built-in Game class, mostly for learning purposes (so I can mess with different game loop types, etc). It's only designed for the Xbox 360, because the hardware is consistent and I don't have to worry about compatibility among different PC hardware configurations. So far, it's working well and I can clear the screen to a color, but I'd like to make sure I handle the GraphicsDevice correctly before moving on. What exactly is the life cycle for the GraphicsDevice on the Xbox 360? Is it ever lost or reset automatically? I know that on Windows, it's lost when the window loses focus, but the Xbox obviously doesn't manage focus. It appears to even keep the graphics device when the Guide pops up, which is the closest thing I can find to "losing focus" on the Xbox. I'd like to think it's simply a matter of "fire and forget," which would make a lot of other things much easier (only needing to load content once, for instance). But I want to make sure.

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• Python In-memory table

  - by nsharish

  What is the right way to forming in-memory table in python with direct lookups for rows and columns.I thought of using dict of dicts this way, class Table(dict): def __getitem__(self, key): if key not in self: self[key]={} return dict.__getitem__(self, key) table = Table() table['row1']['column1'] = 'value11' table['row1']['column2'] = 'value12' table['row2']['column1'] = 'value21' table['row2']['column2'] = 'value22' >>>table {'row1':{'column1':'value11','column2':'value12'},'row2':{'column1':'value21','column2':'value22'}} I had difficulty in looking up for values in columns. >>>'row1' in table True >>>'value11' in table['row1'].values() True Now how do I do lookup if 'column1' has 'value11' Is this method of forming tables wrong?Is there a better way to implement such tables with easier lookups?.Thanks

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• Get logical path from treeview which has HierarchicalDataTemplate

  - by phenevo

  Hi, I have a structure of geography objects: Country Areas, Provinces, Cities and Hotels Country has regions, regions provinces etc... Whne I'll click City node I wanna to get logical path eg: France,Provanse,SomeProvince,Montpellier,Coral Hotel. Each class has fields: name, code nad listOf... Treeview works great, but this method not: private void structureTree_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e) { if (structureTree.SelectedItem is Hotel) { objectCode = ((Hotel)structureTree.SelectedItem).Code; TreeViewItem item = e.OriginalSource as TreeViewItem; DependencyObject parent = VisualTreeHelper.GetParent(item); dlgEditHotel(objectCode, structureTree.Parent.ToString()); } }

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• GUI freezes when executing def function. Use threads?

  - by wtzolt

  Hi, I've made a small program which has 2 buttons and each does certain thing. Here's a simplified version of the code. Thing is it works fine except that the button freezes and stays in a clicked position and whole GUI freezes until the command is completed. As far as I know threads would be best to use in this situation, but I have no idea how to implement it in this example. I use glade and pygtk for gui. def do1: t = 2 #do something time.sleep(t) #do something time.sleep(t) def do2: t = 3 #do something time.sleep(t) #do something time.sleep(t) class we: wTree = None def __init__( self ): self.wTree = gtk.glade.XML( "ui.glade" ) dic = { "on_buttonSone" : self.sone, "on_buttonStwo" : self.stwo, } self.wTree.signal_autoconnect( dic ) gtk.main() def sone(self, widget): i = 0 while i < 3: t = 1 #do something i += 1 time.sleep(t) self.wTree.get_widget("entryResult").set_text("Done.") def stwo(self, widget): start = time.clock() array = ['A','B'] adict = {'A':do1,'B':do2} for f in array: adict[f]() end = time.clock() elapsed = end - start gg = round(elapsed,2) self.wTree.get_widget("entryResult").set_text(str(gg)) go=we()

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• How long does it take to iterate through a long loop?

  - by Carl Rosenberger

  On a modern 64-Bit machine, how long do you think it takes to iterate through all the positive long numbers? Below is a code snippet in Java to demonstrate the idea. Without running the code yourself, how long do you think this code is going to run? How long will similar code run in other programming languages? public class LongLoop { public static void main(String[] args) { long startTime = System.currentTimeMillis(); for (long i = 0; i < Long.MAX_VALUE; i++) { // do nothing, just loop } long stopTime = System.currentTimeMillis(); long duration = stopTime - startTime; System.out.println("Time taken: " + duration + " milliseconds"); } }

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• Java Slick2d - How to translate mouse coordinates to world coordinates

  - by SYNYST3R1

  I am translating in my main class' render. How do I get the mouse position based on the translation? public void render(GameContainer gc, Graphics g) throws SlickException { float centerX = 800/2; float centerY = 600/2; g.translate(centerX, centerY); g.translate(-player.playerX, -player.playerY); gen.render(g); player.render(g); } playerX = 800 /2 - sprite.getWidth(); playerY = 600 /2 - sprite.getHeight(); I update the player position on keydown by .2f * delta Picture to help with explanation i92.photobucket.com/albums/l22/occ31191/Untitled-4.png

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• Centralized error handling in VB6.

  - by AngryHacker

  I have the following method that all the error handlers call: Public Function ToError(strClass As String, strMethod As String) As String On Error GoTo errHandle ToError = "Err " & Err.Number & _ ", Src: " & Err.Source & _ ", Dsc: " & Err.Description & _ ", Project: " & App.Title & _ ", Class: " & strClass & _ ", Method: " & strMethod & _ ", Line: " & Erl Err.Clear exitPoint: Exit Function errHandle: oLog.AddToLog "Error in ToError Method: " & Err.Description, False Resume exitPoint End Function It turns out that because I declare an error handler in this function On Error GoTo errHandle, VB6 clears the error before I am able to record it. Is there a way to prevent the 'On Error GoTo errHandle' statement from clearing the error?

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• Manually Writing the HTML in TWebBrowser Pt. 2

  - by nomad311

  As the name suggests this is a continuation (sort of) of http://stackoverflow.com/questions/2784679/manually-writing-the-html-in-twebbrowser This time around I'm trying to add some auto-refresh logic to the HTML I get. I have pieced together an approach from several sources (see below). In short, I am trying to locate the title node and add a meta node after it (in the HTML head node). But, I get an access violation. Here is the source: iHtmlDoc := IHTMLDocument3(WebBrowser1.Document); iHtmlEleTitle := IHTMLElement2(iHtmlDoc.getElementsByName('title').item(0, 0)); iHtmlEle := IHTMLElement2(IHTMLDocument2(iHtmlDoc).createElement(Format('<meta http-equiv="refresh" content="%d">', [1]))); iHtmlEleTitle.insertAdjacentElement('afterEnd', IHTMLElement(iHtmlEle)); And A (technically not functionally) different way of doing it ...casting is slightly different here: IHTMLElement2(IHtmlDocument3(WebBrowser1.Document).getElementsByName('title').item(0, 0)).insertAdjacentElement('afterEnd', IHTMLDocument2(WebBrowser1.Document).createElement(Format('<meta http-equiv="refresh" content="%d">', [VPI_ISSUANCE_AUTO_RELOAD]))); Again all I get from Delphi is a access exception, and I fished through MSDN documentation on it, but now I'm hoping someone out there has gone through the same and has some insight. Any help? Sources (I think this is all of them): http://webdesign.about.com/od/metataglibraries/a/aa080300a.htm (auto-reload) http://delphi.about.com/od/adptips2005/qt/webbrowserhtml.htm (web browser document as an HTML document) http://msdn.microsoft.com/en-us/library/system.windows.forms.htmlelement.insertadjacentelement(VS.80).aspx (GetElementsByName) http://www.experts-exchange.com/Web_Development/Components/ActiveX/Q_26131034.html (insertAdjacentElement) http://www.experts-exchange.com/Programming/Languages/Pascal/Delphi/Q_23407977.html (GetElementsByName)

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• What's the best way to develop a debugging window for an ajax ASP.Net MVC application

  - by KallDrexx

  While developing my ASP.NET MVC, I have started to see the need for a debugging console window to assist in figuring out what is going right and wrong in my code. I read the last few chapters of the Pro Asp.net MVC book, and the author details how to use http modules to show page load/creation times and linq to sql query logs, both of which I definitely want to be able to see. However, since I am loading a lot of small sections of my page individually with ajax I don't want the debug information right there in the middle of my screen. So the idea I came up with was to have a separate browser window (open-able by a link or some javascript) with a console log, that can contain logged entries both from javascript and from the asp.net mvc run. The former should be relatively easy, but I'm having trouble coming up with a way to log the asp.net information in ajax requests. The direction I have been thinking of going is to create an httpmodule (like the Pro MVC book does), and have that module contain some that append the javascript's log to console calls with the messages. The issue I see with this is finding a way to get the log messages from the controller's action methods to the httpmodule's methods. The only way I see to do this is with a singleton, but I'm not sure if singletons are bad practice for a stateless web application. Furthermore, it seems like if I return json with my ajax calls (instead of pure html) then that won't work at all anyways and unless there is a way to add data to an existing json structure inside the httpmodule. How does everyone else handle this type of debugging in heavily ajax applications? For reference, the javascript library I am using is jquery.

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• A good design pattern for almost similar objects

  - by Sam

  Hello, I have two websites that have an almost identical database schema. the only difference is that some tables in one website have 1 or 2 extra fields that the other and vice versa. I wanted to the same Database Access layer classes to will manipulate both websites. What can be a good design pattern that can be used to handle that little difference. for example, I have a method createAccount(Account account) in my DAO class but the implementation will be slightly different between website A and website B. I know design patterns don't depend on the language but FYI i m working with Perl. Thanks

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• How do I get Linq-to-SQL to refresh its local copy of a database record?

  - by Gary McGill

  Suppose I have an Orders table in my database and a corresponding model class generated by the VS2008 "Linq to SQL Classes" designer. Suppose I also have a stored procedure (ProcessOrder) in my database that I use to do some processing on an order record. If I do the following: var order = dataContext.Orders.Where(o => o.id == orderId).First(); // More code here dataContext.ProcessOrder(orderId); order.Status = "PROCESSED"; dataContext.SubmitChanges(); ...then I'll get a concurrency violation if the ProcessOrder stored proc has modified the order (which is of course very likely), because L2S will detect that the order record has changed, and will fail to submit the changes to that order. That's all fairly logical, but what if I want to update the order record after calling the stored proc? How do I tell L2S to forget about its cached copy and refresh it from the DB?

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• adding model validation errors in rescue

  - by ash34

  I have the following model with a virtual attribute class Mytimeperiod < ActiveRecord::Base validates presence of :from_dt validates_format_of :from_dt, :with => /\A\d{2}\/\d{2}\/\d{4}\Z/, :message => "format is mm/dd/yyyy" def from_dt self.from_date.strftime("%m/%d/%Y") if !self.from_date.blank? end def from_dt=(from_dt) self.from_date = Date.parse(from_dt) rescue self.errors.add_to_base("invalid from dt") end end I am using <%= f.error_messages %> to display the error messages on the form. I am using from_dt as a virtual attribute (string). The 'presence of' and 'format of' validation errors show up on the form, but when the user enters an invalid date format on the form and Date.Parse raises an exception I have a 'errors.add_to_base' statement in the rescue clause. Can anyone tell me why this error does not show up in the form error messages when I disable the 'format of' validation. thanks.

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• Builder pattern and singletons

  - by Berryl

  Does anyone have any links to some code they like that shows a good example of this in c#? As an example of bad code, here is what a builder I have now looks like. I'm trying to have a way to keep the flexibility of the builder pattern but not rebuild the properties. Cheers, Berryl public abstract class ActivityBuilder { public abstract ActivityBuilder Build(); public bool IsBuilt { get; protected set; } public IEnumerable<Project> Projects { get { if(_projects==null) { Build(); } return _projects; } } protected IEnumerable<Project> _projects; // .. other properties }

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• Looking for Eclipse plugin: Lock source tabs in place

  - by Fredrik

  When working with java code in Eclipse I can typically juggle between 20-40 different files, but there usually are just two that I actively work with at the time (test and code). Going back to the code where I want to work after having debugged through 5-10 classes can be a pain. So what I would like to do is to be able to right click on the tab of a class and choose to lock them in place. The classes would then always be available as the first and second tabs furthest to the left in the editor. All other classes (and other files opened in the editor) would then fight over the remaining space in the editor like today. Is there a plugin like this? My google-fu might not be strong enough, cause I find nothing.

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• What to write in "Web location" field when starting an "New website" in Visual Studio 2010?

  - by Ivan

  I want a website to be deployed automatically to a local IIS (built in Windows XP Pro SP3), avoiding VisualStudio-built-in server if possible. I'd like development source files to be stored in a project folder outside wwwroot (I wouldn't mind built files to be copied to wwwroot each time I press F5). I don't store my projects inside default directories inside "My documents". What should I specify as in "Web location" when starting an "New website" in Visual Studio 2010? A deployment path in wwwroot, a folder where I'd like to save my project, or something else? I want the website to be a part of a complex solution in VS 2010, also icludinc a class libray project, a WinForms application project, a Windows Service project and a common Entitity Framework data model.

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• Login to SQL Server Express via development environment (VS2010)

  - by Sanarothe

  Seems like I'm missing something simple, but my attempts to connect to SQL Server Express have failed. I feel like I need to add privileges for my account but I'm not sure where to do it. Dev Env: VS 2010 (Web) SQL: Sql Server Express 2008 OS: XP Trying to open a connection to database returns: Cannot open database "|DataDirectory|DropData.mdf" requested by the login. The login failed. Login failed for user 'devel.' I created the database using the interface in VS 2010 (Add new item - DB File) but my ASP.Net class only covered design-time access and not access in code, so I'm not familiar with what to do. I created a user (Devel) using SQL Server Management Studio to avoid connecting as SA, but couldn't figure out how to give any SQL-level access rights to this account. Any ideas? Thanks, Cameron

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• PHP CLI application debug in ZendStudio (STDIN)

  - by Yuriy

  0 I am trying to debug php CLI using Zend Studio. My problem: I can't get user input from keyboard. This is part of code (method in some class): public function getInput($promt = null, $defaultValue = null) { if(!isset($promt)){ $promt = self::$DEFAULT_PROMPT; } echo $promt; $stdin = fopen ( "php://stdin", "r" ); $val = fgets ( $stdin ); return $val; } So ZS walks through code quite ok, but it stops at $val=fgets() And I have no clue where am I supposed to enter something from keyboard. I tried in console, and everywhere, I chacked debug configuration (Allocate console = on) etc. HELP!

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• How to get the file name for <input type="file" in jsp

  - by deepthinker121

  I want to read the file path from html input type="file" (the entry selected in the file dialog by the user) <script> function OpenFileDialog(form) { var a = document.getElementById("inputfile").click(); SampleForm.filePath.value = //set the path here document.SampleForm.submit(); } </script> <form name="SampleForm" action="TestServlet" method="get"> <input type="file" style="display:none;" id="inputfile"/> <a href="javascript:OpenFileDialog(this.form);">Open here</a> <input type="hidden" name="filePath" value=""/> </form> I want the path of the selected file to be read in my Servlet class How do I get the file path? Can I read it from var a? Or is there any way to directly access the file path from the input type="file" from my servlet?

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• pass objective c object and primitive type into a void *

  - by user674669

  I want to pass 2 variables: UIImage * img int i into another method that only takes a (void *) I tried making a C struct containing both img and i struct MyStruct { UIImage *img; int i; } but xcode gives me an error saying "ARC forbids Objective-C objects in structs or unions" The next thing I tried is to write an objective-c class MyStruct2 containing img and i, alloc-initing an instance of it and typecasting it as (__bridge void*) before passing it to the method. Seems little involved for my use case. Seems like there should be a better way. What's the simplest way to achieve this? Thank you. Edit based on comments: I have to use void * as it is required by the UIView API. I created a selector as mentioned by UIVIew API + (void)setAnimationDidStopSelector:(SEL)selector Please see documentation for setAnimationDidStopSelector at http://developer.apple.com/library/ios/#documentation/uikit/reference/UIView_Class/UIView/UIView.html . It says ... The selector should be of the form: - (void)animationDidStop:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context I want to pass both img and i into the (void *)context argument.

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• Freemarker template not found

  - by brock

  Hi, I'm currently trying to get Freemarker to work with my application using Spring. No matter what I try I keep getting template not found. I am not sure if I have the configuration set up properly, but it never finds my template. Here is my spring bean config: <bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer"> <property name="templateLoaderPath" value="/WEB-INF/freemarker/"/> </bean> Whenever I try to call getTemplate on the freemaker configuration it always sends back a template not found error. So if I do configuration.getTemplate("testTemplate.ftl") it always throws an IOException. I'm not sure if anyone has an idea of what I'm doing wrong. Thanks for all your help!

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• WinForms form freezes

  - by andrew

  On a form (F1) i have a button, from which if i create another form (lets call it F2) and show it there's no problem but i'd like to do something like this Some thread in my app is running a connection and listens for messages from a server. when a message arrives, my main form is registered to get an event that runs a function. From that function i'm trying to create and show the F2 type form (empty, nothing modified in it): it shows it but then it freezes my application. more exactly: public partial class Form1 : Form { public Form1() { InitializeComponent(); ConnectionManagerThread.getResponseListener().MessageReceived += Form1_OnMessageReceived; } private void Form1_OnMessageReceived(object sender, MessageEventArgs e) { Form2 f2 = new Form2(); f2.Show(); } }

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• mvvm-light: Should we merge Cleanup methods in locator?

  - by mark smith

  Hi there, when creating a new ViewModel within the locator class using the snippet it creates a Cleanup Method but there is already one available from the Main so hence an error.... Should we merge them all?? Or should we be renaming the method to Cleanup[Name of viewmodel] for example. I am a little confused here Another question i would like to ask is regards to the naming conventions. I tried to follow the naming convention used with "MAIN"... hence i have CreateLogin, ClearLogin, Login (non static property for binding) etc etc.. Would it not be better to use CreateLoginViewModel, ClearLoginViewModel etc?? Just curious Thanks

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• How to control respond_to based on variable in Rails controller?

  - by smotchkkiss

  The dilemma I'm using a before_filter in my controller that restricts access to admins. However, I want to allow access public access to some methods based on request format. See the index method to understand what I'm talking about. items_controller.rb class ItemsController < ApplicationController before_filter :superuser_required layout 'superuser' def index @items = Item.all respond_to do |format| format.html format.js # I want public to have access to this end end def show @item = Item.find(params[:id]) respond_to do |format| format.html end end def new @item = Item.new respond_to do |format| format.html end end # remaining controller methods # ... def superuser_required redirect_to login_path unless current_user.superuser? end end

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• Java basic authorization with URLConnection

  - by zigomir

  Hello! I'm opening a connection to WebService with an URLConnection class. I also set request property for basic authorization like this: c.setRequestProperty("Authorization", "Basic " + usernameAndPasswordEncoded); Where c is an object of type URLConnection. So this is client side of WebService call. Now on server side I need to get username from session: User user = (User) request.getSession().getAttribute("user"); But this won't get an username. Also if I look through debug mode, I see an anonymous userName in HttpSession object. What to do to solve this problem, so that username is sent through client to WebService server for authorization? Thanks everyone!

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