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  • Python Instance Variable as Default Parameter

    - by DuneBug
    Hello, I have am writing a Python function that takes a timeout value as a parameter. Normally, the user will always use the same timeout value, but on occasion he may want to wait slightly longer. The timeout value is stored as a class instance variable. I want to use the class' timeout instance variable as the default parameter. Currently, I am implementing this as follows: def _writeAndWait (self, string, timeout = -1): if (timeout == -1): timeout = self._timeout I was just wondering, is the proper way to use an instance variable as a default parameter? Or is there a better way that would avoid the "if" check? Thanks, Ryan

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  • How do I save my whole program?

    - by user1444829
    What argument should be in this missing part of formatter.Serliaze to get the program to save just the program as a .exe? Ignore the Openfiles. class FileOption { OpenFileDialog openDialog = new OpenFileDialog(); SaveFileDialog saveDialog = new SaveFileDialog(); BinaryFormatter formatter = new BinaryFormatter(); public void Open() { } public void Save() { if (saveDialog.ShowDialog() == DialogResult.OK) { FileStream file = new FileStream(saveDialog.FileName, FileMode.Create); formatter.Serialize(file, x); // x means that i havent set anything there yet// file.Close(); } } }

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  • WPF DataGrid default column types

    - by Trindaz
    Hi, I'm using a DataGrid to display 2 possible types of DataRow in a DataTable. One type has the column Parent = NULL and the other has Parent set to another DataRow in the same DataTable. The list of column in the DataTable is always different, so explicitly describing each column is not possible. I want to display a UserControl in every cell of the Parent = DataRow rows, and default Text / Check boxes for the Parent = NULL rows. My first strategy is to try and set the default Column type for all automatically generated columns to be a DataGridTemplateColumn, regardless of datatype, so that I can use styles to then use either my UserControl or CheckBox or TextBox where required. How can I do this? More importantly, though, is there a better strategy than this? Cheers, Dave

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  • Serialize WPF component using XamlWriter without default constructor

    - by mizipzor
    Ive found out that you can serialize a wpf component, in my example a FixedDocument, using the XamlWriter and a MemoryStream: FixedDocument doc = GetDocument(); MemoryStream stream = new MemoryStream(); XamlWriter.Save(doc, stream); And then to get it back: stream.Seek(0, SeekOrigin.Begin); FixedDocument result = (FixedDocument)XamlReader.Load(stream); return result; However, now I need to be able to serialize a DocumentPage as well. Which lacks a default constructor which makes the XamlReader.Load call throw an exception. Is there a way to serialize a wpf component without a default constructor?

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  • WinForms prints to default printer even if it's not available/connected

    - by Valentein
    How can I determine if printer is connected? Typically this application prints to the default printer but in some cases that printer may not be available. If so I don't want the job sent to it's queue but rather printed to another available printer. I understand the PinterSettings.InstalledPrinters property. Does PrintDocument.PrinterSettings.IsValid return false if a printer is not available? Does WPF provide this kind of functionality? My problem is different than Printing problem in C# windows app - Always prints to default printer

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  • How to stop Python program execution in IDLE

    - by joaoc
    I have a python script that uses plt.show() as it's last instruction. When it runs IDLE just hangs after the last instruction. I get the image but I don't get the prompt back. On other scripts I typically use ctrl-c to break the program (sometimes doesn't work immediately) but how do I get the prompt back with the plt.show()? Ctrl-c doesn't work... Are there other ways to stop the program? This is IDLE on Windows, if it makes any difference.

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  • vb.net program cannot connect to wampserver

    - by user225269
    I have a vb.net program that uses mysql as its database. And it works when the computer has wampservr installed. But the program gets an unhandled exception error when the computer where its running does not have a wampserver. The only thing that is installed in it is the mysql connector net. How do I make it work. I just want the two programs to access the same mysql database. I already opened port 20 by configuring firewall. Both in TCP and UDP. What do I do? Do I have to tweak the codes?

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  • Let system time determine animation speed, not program FPS

    - by Anders
    I'm writing a card game in ActionScript 3. Each card is represented by an instance of a class extending movieclip exported from Flash CS4 that contains the card graphics and a flip animation. When I want to flip a card I call gotoAndPlay on this movieclip. When the frame rate slows down all animations take longer to finish. It seems Flash will by default animate movieclips in a way that makes sure all frames in the clip will be drawn. Therefor, when the program frame rate goes below the frame rate of the clip, the animation will be played at a slower pace. I would like to have an animation always play at the same speed and as a consequence always be shown on the screen for the same amount of time. If the frame rate is too slow to show all frames, frames are dropped. Is is possible to tell Flash to animate in this way? If not, what is the easiest way to program this behavior myself?

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  • Set default form textfield value (webbrowser control)

    - by Khou
    Hi I would like my application to load a webpage and set default the form textfield value a predefine value. Requirements: -The application is a windows form, it is to use the web browser control, to load a web page. -Textfield values are define by within the application. -When textfield on the webpage matches the applications predefined elements, the predefine fixed value is set and can not be changed by the end user. Example If my application defines element "FirstName" equal to value "John", the text field for value for element "FirstName" will always equal "John" and this value can not be changed by the end user. Below is html/javascript code to perform this functionality, now how do I implement this in a windows form? (without having to modify the loaded webpage source code (if possible). HTML <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <title>page title</title> <script script type="text/javascript" src="demo1.js"></script> </head> <body onload="def(document.someform, 'name', 'my default name value');"> <h2 style="color: #8e9182">test form title</h2> <form name="someform" id="someform_frm" action="#"> <table cellspacing="1"> <tr><td><label for="name">NameX: </label></td><td><input type="text" size="30" maxlength="155" name="name" onchange="def(document.someform, 'name', 'my default name value');"></td></tr> <tr><td><label for="name2">NameY: </label></td><td><input type="text" size="30" maxlength="155" name="name2"></td></tr> <tr><td colspan="2"><input type="button" name="submit" value="Submit" onclick="showFormData(this.form);" ></td></table> </form> </body> </html> JAVASCRIPT function def(oForm, element_name, def_txt) { oForm.elements[element_name].value = def_txt; }

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  • Override default behavior of SPACE key in .net WinForms ListView

    - by Axarydax
    Hello, I'd like to implement some custom behavior of Space key in a ListView. Basically I'd like to toggle selected status of the item under cursor - that should be fairly simple this.FocusedItem.Selected = !this.FocusedItem.Selected; but alas, it also does the default action, which is to select the focused item. This way I am unable to 'unselect' the focused item. I've looked for similar problems and they suggest using PreviewKeyDown event, in which I would process the key and disallow the ListView to do its default action. But the PreviewKeyDown event argument has no "handled" property, so I cannot 'eat' this key.

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  • Sonar default, meet "container state was: CONSTRUCTED"

    - by larry cai
    Environment: hudson/sonar/maven2 in ubuntu locally with default parameters And I got the log from hudson below, I can't figure out where is the problem. [INFO] Sonar host: http://localhost:9000 [INFO] Sonar version: 2.0.1 [INFO] [sonar-core:internal {execution: default-internal}] [INFO] Database dialect class org.sonar.api.database.dialect.Derby [INFO] ------------- Analyzing Game of Life business logic module [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Can not execute Sonar Embedded error: Can not analyze the project Cannot stop. Current container state was: CONSTRUCTED [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.lifecycle.LifecycleExecutionException: Can not execute Sonar And I notice it also has problem when run it command line without hudson mvn sonar:sonar

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  • Spawn a multi-threaded Java program from a Windows command line program, spawner won't end until spa

    - by Ross Patterson
    Short version: How can I prevent a spawned Java process in Windows from blocking the spawning process from ending? Long version: I'm trying to spawn a multi-threaded Java program (Selenium RC, not that it should matter) from a program launched from the Windows command line (NAnt's <exec> task, again, not that it should matter). I'm doing it using the Windows "start" command, and the spawned process is started and runs correctly. The spawning process receives control back and finishes (NAnt says "BUILD SUCCEEDED"), but doesn't actually exit to the command line. When the spawned process finally terminates (could be hours later), the command process returns and the command line prompt occurs. For example: <target name="start_rc"> <exec program="cmd" failonerror="false" workingdir="${ross.p5.dir}\Tools\selenium\selenium-server-1.0.1" verbose="true"> <arg value="/C"/> <arg value="start"/> <arg value="java"/> <arg value="-jar"/> <arg path="${ross.p5.dir}\Tools\selenium\selenium-server-1.0.1\selenium-server.jar"/> <arg value="-userExtensions"/> <arg path="${ross.p5.dir}\Tools\selenium\selenium-server-1.0.1\user-extensions.js"/> <arg value="-browserSideLog"/> <arg value="-log"/> <arg value="${ross.p5.dir}\artifacts\selenium.log"/> <arg value="-debug"/> </exec> </target> Produces: C :\Ross>nant start_rc NAnt 0.86 (Build 0.86.2898.0; beta1; 12/8/2007) Copyright (C) 2001-2007 Gerry Shaw http://nant.sourceforge.net Buildfile: file:///C:/Ross/ross.build Target framework: Microsoft .NET Framework 3.5 Target(s) specified: start_rc start_rc: [exec] Starting 'cmd (/C start java -jar C:\p5\Tools\selenium\selenium-server-1.0.1\selenium-server.jar -userExtensions C:\p5\Tools\selenium\selenium-server-1.0.1\user-extensions.js -browserSideLog -log C:\p5\artifacts\selenium.log -debug)' in 'C:\p5\Tools\selenium\selenium-server-1.0.1' BUILD SUCCEEDED Total time: 4.1 seconds. ... and then nothing until I close the window where Java is running, then ... C:\Ross> Obviously something is preventing the nant process from terminating, but shouldn't the Windows START command prevent that?

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  • How to change default image of derived ToolStripButton?

    - by Special Touch
    It seems like a simple task. Create a C# class that derives from ToolStripButton. The derived ToolStripButton should behave exactly the same as the parent class in the designer and the application, except that the default image should be different. Surprisingly just changing the constructor is not sufficient: public CustomToolStripButton() { base.Image = (Image) new Bitmap(typeof(CustomToolStripButton), "CustomImage.bmp"); } When the ToolStripButton is displayed in the designer, the original default image is shown. There must be a simple solution. What could it be?

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  • StructureMap: "No default instance of plugin defined" - even though it is

    - by Dave Hanna
    I've been using StructureMap for about 6 months now; you would think it would start getting easier. It doesn't seem to. Here's the first line of my registry: For<IDbConnection>() .Singleton() .Use<SqlConnection>() .Ctor<string>(WebConfigurationManager.ConnectionStrings["UnifiedConnectionString"].ConnectionString); It compiles and runs. But when I try to use that Interface, like this: return MsSqlConfiguration.MsSql2008.ConnectionString(((DbConnection)ObjectFactory.GetInstance<IDbConnection>()).ConnectionString); I get StructureMap Exception Code: 202 No Default Instance defined for PluginFamily System.Data.IDbConnection, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Now I may be missing something (okay, I obviously am), but I don't know how much more plain I can be about defining the default instance for IDbConnection. What am I doing wrong?

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  • Setting the default jsp view with spring mvc

    - by Walker
    I want to set one of jsp files in my jsps folder as the default view for the application. Is there any way we can tell in that abc.jsp needs to be default and it can be found in such and such path. Also the url pattern is html so is there a way it can be mapped in Spring MVC. For example - When a user types www.example.com , I want the application to direct to abc.jsp page and also when someone types www.example.com/something, even then application should direct to abc.jsp, but the url pattern shouldnt be compromised. Many Thanks. Nice Day Walker

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  • Clear default values using onsubmit

    - by Thomas
    I need to clear the default values from input fields using js, but all of my attempts so far have failed to target and clear the fields. I was hoping to use onSubmit to excute a function to clear all default values (if the user has not changed them) before the form is submitted. <form method='get' class='custom_search widget custom_search_custom_fields__search' onSubmit='clearDefaults' action='http://www.example.com' > <input name='cs-Price-2' id='cs-Price-2' class='short_form' value='Min. Price' /> <input name='cs-Price-3' id='cs-Price-3' class='short_form' value='Max Price' /> <input type='submit' name='search' class='formbutton' value=''/> </form> How would you accomplish this?

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  • theming sencha touch error: File to import not found or unreadable: sencha-tou ch/default/all

    - by dan
    I just cant find a workarround for this, please help my config.rb in location $PROJECT_HOME/assets/www/theming dir = File.dirname('..Path_to_project_home..\assets\www\theming\config.rb') load File.join(dir, '..', 'lib', 'touch', 'resources', 'themes') sass_path = dir css_path = dir environment = :production output_style = :compressed this is my app.scss: @import 'sencha-touch/default/all'; @include sencha-panel; @include sencha-buttons; @include sencha-toolbar; @include sencha-list; @include sencha-layout; @include sencha-sheet; @include sencha-msgbox; in the console in the directory of the 'sass_path' I run compass compile app.scss but I get the following error: File to import not found or unreadable: sencha-touch/default/all. Please help, cant solve this.

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  • Getting a RichTextCtrl's default font size in wxPython

    - by Sam
    I have a RichTextCtrl, which I've modified to accept HTML input. The HTML parsing code needs to be able to increase and decrease the font size as it gets tags like <font size="-1">, but I can't work out how to get the control's default font size to adjust. I tried the following (where self is my RichTextCtrl): fred = wx.richtext.RichTextAttr() self.GetStyle(0,fred) print fred.GetFontSize() However, the final instruction fails, because GetStyle turns fred into a TextAttrEx and so I get AttributeError: 'TextAttrEx' object has no attribute 'GetFontSize'. Am I missing a vastly easier way of getting the default font size?

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  • Why does Java read its default settings from the system

    - by Bozho
    Java is reading the locale, timezone and encoding information (and perhaps more) from the system it is installed on. This often brings bad surprises (brought me one just yesterday). Say your development and production servers are set to have TimeZone GMT+2. Then you deploy on a production server set to GMT. a 2-hour shift may not be easy to observe immediately. And although you can pass a TimeZone to your calendars, APIs might be instantiating calendars (or dates) using the default timezone. Now, I know one should be careful with these settings, but are easy to miss, hence make programs more error-prone. So, why doesn't Java have its own defaults - UTF-8, GMT, en_US (yes, I'm on non-en_US locale, but having it as default is fine). Applications could read the system settings via some API, if needed. Thus programs would be more predictable. So, what is the reason behind this decision?

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  • Help with making a C# P2P Chat Program

    - by Sandeep Bansal
    Hi everyone, I want to make a P2P Chat client, all I want it to do is to be able to send text across to each peer. I looked at a Chat Client from this example: http://www.geekpedia.com/tutorial239_Csharp-Chat-Part-1---Building-the-Chat-Client.html And am wondering if it can be converted to a p2p program? If so how can it be and can someone provide some code as it will help a lot. If it can't how can I make a really simple p2p chat program? Codes and examples will be very helpful. btw I did look at this article, but it didn't help me: http://msdn.microsoft.com/en-us/library/ms751502.aspx

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  • Is there a library for editing program flow?

    - by Iulian Serbanoiu
    Hello, I was wondering if there is a library for editing program flow. I refer to conditions if, loops (do, while, for) and other elements that can exist inside a program. What I would like to have is some sort of a CAD application (similar to an UML editor) from where I can take some elements and edit their properties, make connections between them. Do you know similar software that does this, or resembles a little what I'm trying to achieve? Thanks, Iulian PS: It is something that should resemble this image. PS2: I want to write code for doing this, I was wondering if such things exist.

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  • ASP.NET 3.5 Web Site stopped importing System namespace by default

    - by Alexis
    I have a VB Web Site project that has recently (and mysteriously) stopped importing the "System" namespace by default. I'm having to either place a "Imports System" line at the top of each code behind, or preface everything with "System", which is fairly annoying, not to mention redundant. I can't for the life of me figure out how to get the System namespace back to being imported by default. I've already checked to see that WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG\web.config contains the <add namespace="System"/> line--it does. That was my best lead. I'm tearing my hair out. Does anyone have any suggestions?

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  • Where to put the default destroy in the jQuery UI 1.8.1 widget's destroy function

    - by dominicminicoopers
    Ok, I'm having a slight bit of confusion writing my own jQuery UI widget plugins. The problem lies in the destroy function. In the docs, it says to put the default destroy first then write other things particular to the widget after it. $.Widget.prototype.destroy.apply(this, arguments); // default destroy // now do other stuff particular to this widget See http://jqueryui.com/docs/Developer_Guide However in their example scripts (those being the actual pluings for jQuery Ui released code, does it the opposite. The $.Widget.prototype.destroy.apply(this, arguments); is at the end of the function. See http://dev.jqueryui.com/browser/trunk/ui/jquery.ui.progressbar.js (and all of the other built in widgets as well) So which is it? The way the current widgets are written, or by the explanation in the code comment in the Developer_Guide?

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