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  • Building a wiki like data model in rails question.

    - by lillq
    I have a data model in which I would like to have an item that has a description that can be edited. I would like to also keep track of all edits to the item. I am running into issues with my current strategy, which is: class Item < ActiveRecord::Base has_one :current_edit, :class_name => "Edit", :foreign_key => "current_edit_id" has_many :edits end class Edit < ActiveRecord::Base belongs_to :item end Can the Item have multiple associations to the same class like this? I was thinking that I should switch to keeping track of the edit version in the Edit object and then just sorting the has_many relationship base on this version.

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  • Modify Hyperlinkfield text in Gridview

    - by JohnG
    I am stumped on this one. I want to modify the text in a Hyperlinkfield of Gridview after the data is bound to it. I found similar code to this on msdn and I can't get it to work. protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { e.Row.Cells[2].Text = e.Row.Cells[2].Text + "random text"; } I also tried similar code in the Page_PreRender event with no luck. I have also tried calling DataBind() before this one line of code with no help. I always just get "random text" in the cell without the data from the DB. Thanks

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  • I need to debug my BrowserHelperObject (BHO) (in C++ with Visual Studio 2008) after a internet explo

    - by BHOdevelopper
    Hi, here is the situation, i'm developping a Browser Helper Object (BHO) in C++ with Visual Studio 2008, and i learned that the memory wasn't managed the same way in Debug mode than in Release mode. So when i run my BHO in debug mode, internet explorer 8 works just fine and i got no erros at all, the browser stays alive forever, but as soon as i compile it in release mode, i got no errors, no message, nothing, but after 5 minutes i can see through the task manager that internet explorer instances are just eating memory and then the browser just stop responding every time. Please, I really need some hint on how to get a feedback on what could be the error. I heard that, often it was happening because of memory mismanagement. I need a software that just grab a memory dump or something when iexplorer crashes to help me find the problem. Any help is appreciated, I'll be looking for responses every single days, thank you.

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  • Python .app doesn't read .txt file like it should

    - by Bambo
    This question relates to this one: Python app which reads and writes into its current working directory as a .app/exe i got the path to the .txt file fine however now when i try to open it and read the contents it seems that it doesn't extract the data properly. Here's my code - http://pastie.org/4876896 These are the errors i'm getting: 30/09/2012 10:28:49.103 [0x0-0x4e04e].org.pythonmac.unspecified.main: for index, item in enumerate( lines ): # iterate through lines 30/09/2012 10:28:49.103 [0x0-0x4e04e].org.pythonmac.unspecified.main: TypeError: 'NoneType' object is not iterable I kind of understand what the errors mean however i'm not sure why they are being flagged up because if i run my script with it not in a .app form it doesn't get these errors and extracts the data fine.

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  • initializer_list in the VC10

    - by user335870
    hi i wrote this program in VC++ 2010: class class1 { public: class1 (initializer_list<int> a){}; int foo; float Bar; }; void main() { class1 c = {2,3}; getchar(); } but i get this errors when i compile project: Error 1 error C2552: 'c' : non-aggregates cannot be initialized with initializer list c:\users\pswin\documents\visual studio 2010\projects\test_c++0x\test_c++0x\main.cpp 27 and 2 IntelliSense: initialization with '{...}' is not allowed for object of type "class1" c:\users\pswin\documents\visual studio 2010\projects\test_c++0x\test_c++0x\main.cpp 27 what is the problem?

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  • What's the performance penalty of weak_ptr?

    - by Kornel Kisielewicz
    I'm currently designing a object structure for a game, and the most natural organization in my case became a tree. Being a great fan of smart pointers I use shared_ptr's exclusively. However, in this case, the children in the tree will need access to it's parent (example -- beings on map need to be able to access map data -- ergo the data of their parents. The direction of owning is of course that a map owns it's beings, so holds shared pointers to them. To access the map data from within a being we however need a pointer to the parent -- the smart pointer way is to use a reference, ergo a weak_ptr. However, I once read that locking a weak_ptr is a expensive operation -- maybe that's not true anymore -- but considering that the weak_ptr will be locked very often, I'm concerned that this design is doomed with poor performance. Hence the question: What is the performance penalty of locking a weak_ptr? How significant is it?

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  • How to use Map element as text of a JComboBox

    - by llm
    I am populating a JComboBox (using addItem()) with all the elements of a collection. Each element in the collection is a HashMap (so its a ComboBox of Hashmaps..). My question is - Given that I need each item to be a HashMap how do I set the text to apear in the combobox on the GUI? It needs to be the value of a certain key in the map. Normally if I am populating a combobox with my own type, I would just overide the toString() method...but I am not sure how to acheive this since I am using a Java HashMap. Any ideas (if possible, without implementing my own HashMap)? Update: It seems like there isn't anyway to avoid having the object int the JComboBox overide toString() if I want custom functionality..I wish there was a way to (1) specify the objects to be loaded into the JComboBox and (2) specify how these objects are to appear in the GUI.

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  • Problem with sys.argv[1] when unittest module is in a script

    - by chrissygormley
    Hello, I have a script that does various things and access paramenters using sys.argv but when the script gets to the unittest part of the code it says there is no module for this. The script that I have is: class MyScript(): def __init__(self): self.value = sys.argv[1] def hello(self): print self.value def suite(self): modules_to_test = ('external_sanity_onvif', 'starttest') alltests = unittest.TestSuite() for module in map(__import__, modules_to_test): alltests.addTest(unittest.findTestCases(module)) return alltests if __name__ == '__main__': Run = MyScript() Run.hello() log_file = 'log_file.txt' test_file = open(log_file, "w") runner = unittest.TextTestRunner(test_file) unittest.main(defaultTest='Run.suite', testRunner=runner) Say I enter ./script.py Hello in the command line. The error I get is: AttributeError: 'module' object has no attribute 'Hello' If I remove the unittest module it works. Also if I remove the testrunner log and leave it at: unittest.main(defaultTest='Run.suite') This still doesn't work. Can anyone help. Thanks

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  • what is the best way to have a Generic Comparer

    - by oo
    I have a lot of comparer classes where the class being compared is simply checking the name property of the object and doing a string compare. For example: public class ExerciseSorter : IComparer<Exercise> { public int Compare(Exercise x, Exercise y) { return String.Compare(x.Name, y.Name); } } public class CarSorter : IComparer<Car> { public int Compare(Car x, Car y) { return String.Compare(x.Name, y.Name); } } what is the best way to have this code generic so i dont need to write redundant code over and over again.

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  • Work flow for authentication and API use with Twitter on OAuth

    - by Gustavo Carreno
    I'm a bit confused about all this OAuth bruhaha in the sense that all the examples I can find are for web applications and none of them for desktop applications. I understand the Web application work flow, but that includes some redirections between the web app and twitter. How does one do this in an desktop application? How does the redirects work? Should I have to include a Web Browser object? Is there a way to go around this? Could anyone point me to resources instead of a full blown solution please? Thanks

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  • Error in asp.net C#

    - by Ishan
    How to pass Editor1 as Parameter: In my aspx.cs i am giving a call to a function which is in .cs file for the same project, as follows: protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e) { DropDown abs = new DropDown(); abs.dd(this.DropDownList2, this.DropDownList3); } .CS file code public void dd(DropDownList DropDownList2, DropDownList DropDownList3) { //My code which contains DropDownList2 DropDownList3 and Editor1 } The error that i am getting is: Error 1 The name 'Editor1' does not exist in the current context The way i have passed DropDownList2 and DropDownList3 i am not able to pass Editor1(It is an ajax control). How do i pass it?

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  • Problem while looping on a NSDictionary

    - by Tom
    Hi! The end of my loop causes a EXC_BAD_ACCESS. Here's my dictionary (AppDelegate.data): 1 = ( 3, "Test 1", False, "" ); 2 = ( 4, "Test 2", False, "" ); And here is my loop: for (id theKey in AppDelegate.data) { if (theKey = nil) { NSLog(@"HOLY COW"); } else { NSLog(@"Key: %@ ?", theKey); } } It never says holy cow, and it says the right key but at the end it crashes... Do you have any idea why? It should only loop on 1 and two and then exit the loop... I know that there's always a "nil" object at the end that's why I did a condition with it but it doesn't look like it works at all.. Thanks!

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  • WxPython multiple grid instances

    - by randomPythonHacker
    Does anybody know how I can get multiple instances of the same grid to display on one frame? Whenever I create more than 1 instance of the same object, the display of the original grid widget completely collapses and I'm left unable to do anything with it. For reference, here's the code: import wx import wx.grid as gridlib class levelGrid(gridlib.Grid): def __init__(self, parent, rows, columns): gridlib.Grid.__init__(self, parent, -1) self.moveTo = None self.CreateGrid(rows, columns) self.SetDefaultColSize(32) self.SetDefaultRowSize(32) self.SetColLabelSize(0) self.SetRowLabelSize(0) self.SetDefaultCellBackgroundColour(wx.BLACK) self.EnableDragGridSize(False) class mainFrame(wx.Frame): def __init__(self, parent, id, title): wx.Frame.__init__(self, parent, id, title, size=(768, 576)) editor = levelGrid(self, 25, 25) panel1 = wx.Panel(editor, -1) #vbox = wx.BoxSizer(wx.VERTICAL) #vbox.Add(editor, 1, wx.EXPAND | wx.ALL, 5) #selector = levelGrid(self, 1, 25) #vbox.Add(selector, 1, wx.EXPAND |wx.BOTTOM, 5) self.Centre() self.Show(True) app = wx.App() mainFrame(None, -1, "SLAE") app.MainLoop()

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  • Adobe Reader 9.0 memory leak while loading-unloading PDF files every one second indefinitely

    - by Total Starnger
    I have c++ written MFC based application that has PDF object viewer as a part of the implementation. A whole thing works just fine with Adobe Reader 8.0. Once I switched to Adobe Reader 9.0 as a default PDF reader, I keep experiencing small memory leak that forces my application to crash within a half an hour of continuous loading-unloading different PDF files. Any ideas what might cause this memory leak and is there any cure besides replacing Adobe Reader 9.0 with anything else? (Works fine with Foxit PDF reader as well, by the way..)

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  • What would you do if you coded a C++/OO cross-platform framework and realize its laying on your disk

    - by Manuel
    This project started as a development platform because i wanted to be able to write games for mobile devices, but also being able to run and debug the code on my desktop machine too (ie, the EPOC device emulator was so bad): the platforms it currently supports are: Window-desktop WinCE Symbian iPhone The architecture it's quite complete with 16bit 565 video framebuffer, blitters, basic raster ops, software pixel shaders, audio mixer with shaders (dsp fx), basic input, a simple virtual file system... although this thing is at it's first write and so there are places where some refactoring would be needed. Everything has been abstracted away and the guiding principle are: mostly clean code, as if it was a book to just be read object-orientation, without sacrifying performances mobile centric The idea was to open source it, but without being able to manage it, i doubt the software itself would benefit from this move.. Nevertheless, i myself have learned a lot from unmaintained projects. So, thanking you in advance for reading all this... really, what would you do?

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  • Django complex queries

    - by Josh K
    I need to craft a filter for an object that checks date ranges. Right now I'm performing a very inefficient loop which checks all the objects. I would like to simplify this to a database call. The logic is you have a start and an end date objects. I need to check if the start OR the end is within the range of an appointment. if (start >= appointment.start && start < appointment.end) || (end > appointment.start && end <= appointment.end) I could do this in SQL, but I'm not as familiar with the Django model structure for more complex queries.

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  • How to populate gridview on button_click after searching from access database?

    - by Usman
    I am creating a form in c#.net . I want to populate the gridview only on button click with entries meeting search criteria. I have tried but on searching ID it works but on searching FirstName it gives error plz check SQL also. My Code behind private void button1_Click(object sender, EventArgs e) { try { string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=L:/New project/Project/Project/Data.accdb"; string sql = "SELECT * FROM AddressBook WHERE FirstName='" + textBox1.Text.ToString(); OleDbConnection connection = new OleDbConnection(strConn); OleDbDataAdapter dataadapter = new OleDbDataAdapter(sql, connection); DataSet ds = new DataSet(); connection.Open(); dataadapter.Fill(ds, "AddressBook"); connection.Close(); dataGridView1.DataSource = ds; dataGridView1.DataMember = "AddressBook"; } catch (System.Exception err) { this.label27.Visible = true; this.label27.Text = err.Message.ToString(); } }

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  • How to programmatically blur an area in a movie (in python) ?

    - by Stefano Borini
    I have a movie, and I want to produce a new movie out of it with an area blurred (e.g. an object, a writing or a face). The area is moving, so I must have fine control of the current frame and move the position of the blur area accordingly. Blur is an option, but also a dark mask is fine too. Now, I have a question open at superuser on which software to use, but since I suspect I will have to buy adobe premiere to do something like this, and I don't want to shell out a kidney for something I have to do once, I am thinking about coding it myself in python. What are the best libraries available for this task ?

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  • Arbitrary Header content for each row in WPF datagrid

    - by tk
    I'm trying to put row header text based on a converter function of the index of the row. I found a way to bind to the datagridrow like below, but i can't find how to get the row index of the datagridrow object. <DataTemplate x:Key="MyRowHeaderTemplate" DataType="DataRowView"> <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Margin="1,0,1,0" Padding="1,0,1,0" Text="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type DataGridRow}}, Path=Item}"/> </DataTemplate> How can i get the row index and use my converter function to set the row header text?

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  • Using Cases to change background colour | Visual Studio 2008

    - by Simon
    I really need help working with cases, I'm only learning it so far, but just can't get a drop down menu to work that would change the background of a Textbox. Private Sub cbColours_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cbColours.SelectedIndexChanged Select Case colours Case Is = "Red" txtSpace.BackColor = Color.Red Case Is = "Blue" txtSpace.BackColor = Color.Blue Case Is = "Green" txtSpace.BackColor = Color.Green End Select End Sub It isn't doing anything at all... In the dropdown menu, it has Red, Blue and Green one per line When the value (e.g. Green) is clicked, it will then change the Textbox to the colour selected. Many help appreciated :)

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  • C++ Constructor Initializer List - using member functions of initialized members

    - by Andy
    I've run into the following a few times with initializer lists and I've never been able to explain it well. Can anyone explain why exactly the following fails (I don't have a compiler to catch typos, so bear with me): class Foo { public: Foo( int i ) : m_i( i ) {} //works with no problem int getInt() {return m_i;} ~Foo {} private: int m_i; }; class Bar { public: Bar() : m_foo( 5 ), //this is ok m_myInt( m_foo.getInt() ) //runtime error, seg 11 {} ~Bar() {} private: Foo m_foo; int m_myInt; }; When trying to call member functions of members initialized higher up the initializer list, I get seg faults. I seem to recall this is a known problem (or perhaps somehow by design) but I've never seen it well described. The attached example is contrived with plain old data types, but substitute the Bar::m_myInt with another object lacking a default (empty) constructor and the issue is more real. Can anyone enlighten me? Thanks!

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  • "paste" listener on a SWT widget

    - by Fredrik
    I have an application with a SWT widget, say a org.eclipse.swt.widgets.Text, and want to add some control to the paste function. The idea is that if the user can paste a string of IDs, I detect that, run some code and paste the object that corresponds to the IDs. So I'm looking for some "ClipBoardListener" of some sort to add to my widget, but that doesnt seem to exist. A keylistener would only trap the pastes done by key and then you would have to deal with different key combos for pasting in different OS's. Based on this java 1.2 question I tried subclassing the text class and override the inser method, but that didnt work Exception in thread "main" org.eclipse.swt.SWTException: Subclassing not allowed Seemed like an ugly solution anyway.

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  • How to access the user font settings of the Internet Explorer?

    - by Mil
    I would like to access the Internet Explorer user settings for fonts, especially the font family, within a Browser Helper Object written in C#. I have looked into SHDocVw.WebBrowser and IHTMLDocument( to 5) but I don't see what I'm looking for or missing the property. The BHO is for Internet Explorer 7. Thank you very much! Edit: Richard asks why I need this information: The font-family you can adjust in the IE7 settings is used if the given font-families by the HTML document or CSS are not installed on the system. I need this application-based font-family which is used to render the text in the last instance (if all other information fail).

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  • .wmv player not working

    - by blackessej
    So...I've got an embedded object that looks like this: <div id="vid"> <script type="text/javascript"> var cnt = document.getElementById("vid"); var src = 'wmvplayer.xaml'; var cfg = { file:'images/photostory.wmv', height:'240', width:'360', windowless:'true' }; var ply = new jeroenwijering.Player(cnt,src,cfg); so1.addParam('allowfullscreen','true'); so1.addParam('allowscriptaccess','always'); so1.addVariable('file','images/photostory.wmv'); so1.write('vid'); </script> </div> ..with all the right scripts in the head and everything. The player loads just fine, all the functionality is there, but the video just wont play. It seems like it starts to, but nah... Thanks, in advance, for any help.

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  • jQuery Tablesorter - disabled headers show progress bar, sortEnd never triggered

    - by McGirl
    I'm combining Tablesorter's 'disable headers using options' function and the 'trigger sortStart / sortEnd' function and have run into an issue. The following code works fine for the most part, BUT: when you click on a disabled header, the progress-indicating #overlay div appears and never goes away. <script type="text/javascript" id="js"> $(document).ready(function() { // call the tablesorter plugin, the magic happens in the markup $("#projectTable").tablesorter({ // pass the headers argument and assing a object headers: { // assign the secound column (we start counting zero) 1: { // disable it by setting the property sorter to false sorter: false }, // assign the third column (we start counting zero) 2: { // disable it by setting the property sorter to false sorter: false } } }); //assign the sortStart event $("#projectTable").bind("sortStart",function() { $("#overlay").show(); }).bind("sortEnd",function() { $("#overlay").hide(); }); }); </script> Any ideas on how I could fix this so that nothing at all happens when the disabled headers are clicked? Thanks!

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