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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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  • Relation between TCP/IP Keep Alive and HTTP Keep Alive timeout values

    - by Suresh Kumar
    I am trying to understand the relation between TCP/IP and HTTP timeout values. Are these two timeout values different or same? Most Web servers allow users to set the HTTP Keep Alive timeout value through some configuration. How is this value used by the Web servers? is this value just set on the underlying TCP/IP socket i.e is the HTTP Keep Alive timeout and TCP/IP Keep Alive Timeout same? or are they treated differently? My understanding is (maybe incorrect): The Web server uses the default timeout on the underlying TCP socket (i.e. indefinite) and creates Worker thread that counts down the specified HTTP timeout interval. When the Worker thread hits zero, it closes the connection.

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  • Codeigniter: How to build an edit form that uses form validation and re-population?

    - by Sergio
    Hi There, I have a simple form in codeigniter that I wish to use for the editing or records. I am at the stage where my form is displayed and the values entered into the corresponding input boxes. This is done by simply setting the values of said boxes to whatever they need to be in the view: <input type="text" value="<?php echo $article['short_desc'];?>" name="short_desc" /> But, if I wish to use form_validation in codeigniter then I have to add thos code to my mark-up: <input value="<?php echo set_value('short_desc')?>" type="text" name="short_desc" /> So not the value can be set with the set_value function should it need to be repopulated on error from the post data. Is there a way to combine the two so that my edit form can show the values to be edited but also re-populate? Thanks

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  • Null safe way to get values from an IDataReader

    - by kumar
    Hi all, (LocalVariable)ABC.string(Name)= (Idatareader)datareader.GetString(0); this name value is coming from database.. what happening here is if this name value is null while reading it's throwing an exception? I am manually doing some if condition here. I don't want to write a manual condition to check all my variables.. I am doing something like this now.. string abc = (Idatareader)datareader.GetValue(0); if(abc = null) //assiging null else assiging abc value is there something like can we write extension method for this? thanks

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  • WPF DataGridTextColumn Can't type point for float data

    - by Alvin
    I had a WPF DataGrid and use DataGridTextColumn Binding to a Collection. The items in Collection had some float property. When my program launched, I modify the value of float property in DataGrid, if I type a integer value, it works well. But if I type char . for a float value, char . can't be typed. I had to type all the numbers first, and then jump to the . position to type char . to finish my input. So how can I type . in my situation? Thanks.

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  • TableView as DetailView's subview with a UISplitViewController?

    - by Gerry
    I have a UISplitViewController, I used the iPad template to start. To change the type of view in the detailview area, I'm adding my view types as subviews to the DetailViewController's view. This works for UIViewController derived views, but not for UITableViewController view types?. Why would this be? My problem is rooted in the fact that the manufactured DetailView is the UISplitViewController's delegate. To get the correct popover behaviour, I'd like to keep it add buttons to its toolbar and then based on user selection open different details when master list selections are made. Thanks,

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  • Json.NET - How to serialize a class using custom resolver

    - by Mendy
    I want to serialize this class: public class CarDisplay { public string Name { get; set; } public string Brand { get; set; } public string Year { get; set; } public PictureDisplay[] Pictures { get; set; } } public class PictureDisplay { public int Id { get; set; } public string SecretKey { get; set; } public string AltText { get; set; } } To this Json test: { Name: "Name value", Brand: "Brand value", Year: "Year value", Pictures: ["url1", "url2", "url3"] } Note that each Car have an pictures array with only url string, instead of all the properties that Picture class have. I know that Json.NET have the notion of Custom Resolver, but I don't sure exactly how to use it.

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  • django-rest-framework: api versioning

    - by w--
    so googling around it appears that the general consensus is that embedding version numbers in REST URIs is a bad practice and a bad idea. even on SO there are strong proponents supporting this. e.g. Best practices for API versioning? My question is about how to accomplish the proposed solution of using the accept header / content negotiation in the django-rest-framework to accomplish this. It looks like content negotiation in the framework, http://django-rest-framework.org/api-guide/content-negotiation.html is already configured to automatically return intended values based on accepted MIME types. If I start using the Accept header for custom types, I'll lose this benefit of the framework. Is there a better way to accomplish this in the framework?

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  • javascript onkeypressed not giving current text box content

    - by Austin
    I have an html form like this: <form id="boxy" action="layout.html" method="get" accept-charset="utf-8"> <input type="text" id="a" onkeypress="Boxy.Check(this);"> </form> Invoking javascript like this: Boxy.Check = function() { input = document.getElementById(this.currentSelector.id).value; console.log("\"" + input + "\""); }; However, this.value is the previous value before onkeypress. For example, if I just type "A" into the form, console.log() prints "". And if I type "AA", console.log prints "A". Is there a way to get the current content of the input?

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  • Exim 4 pipe select command/script from mysql db

    - by axel.klein
    Is there an option to run a mysql lookup in the pipe driver of exim? MYSQL_Q_SCRIPT=SELECT script FROM MYSQL_EMAILTABLE WHERE domain='${quote_mysql:$domain}' AND local_part='${quote_mysql:$local_part}' command = "${lookup mysql {MYSQL_Q_SCRIPT}{$value} I am always getting an error like this: "Expansion of "${lookup" from command "${lookup mysql {SELECT script FROM emails WHERE domain='${quote_mysql:$domain}' AND local_part='${quote_mysql:$local_part}'}{$value}}" in run_script transport failed: missing lookup type" The problem is that exactly the same query works fine in the appenddriver. So I do not see the mistake.

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  • Enumerations and String values in ASP.NET

    - by Jason
    I'm looking for some best practice advice on enumerations and retrieving an associated string value. Given this: public enum SerialKillers { TedBundy, EdGein, AlbertFish, GeorgeBush } What is the best way to get a related string value of the name? Eg. "Ted Bundy", given that the string value may not match the representation in the enumeration. eg "George W Bush" My current thinking is function accepting an enum and returning a string, but would that not mean hard coding the string values (which I prefer not to do)? Is using a resources file where the string can be retrieved via the enumeration too heavy handed? Should I accept the fact I am going to Hell for victimising Ted Bundy by associating him with George Bush?

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  • Test if a Property is not Null before Returning

    - by DaveDev
    I have the following property public MyType MyProperty {get;set;} I want to change this property so that if the value is null, it'll do populate the value first, and then return it... but without using a private member variable. For instance, if I was doing this: public MyType MyProperty { get { if (_myProperty != null) return _myProperty else _myProperty = XYZ; return _myProperty; } set { _myProperty = value; } } is this possible? Or do I need the member variable to get it done?

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  • forloop and table in latex

    - by Tim
    Hi, Here is the latex code for my table: \begin{table}{| c || c | c | c || c | c | c | } \caption{Examples of the concepts. \label{tab:conceptsimgs}}\\ \hline \backslashbox{Concept}{Class} &\multicolumn{3}{|c||}{Negative Class} & \multicolumn{3}{|c|}{Positive Class} \\ \hline \forloop{themenumber}{1}{\value{themenumber} < 4}{ %\hline \arabic{themenumber} \forloop{classnumber}{0}{\value{classnumber} < 2}{ \forloop{imagenumber}{1}{\value{imagenumber} < 4}{ & 0 } } \\ \hline } \end{table} Something is wrong in the result however. There is some extra thing at the end of the table, as shown in this image. How can I fix it? Thanks and regards!

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  • MediaElement.Position behaviour and Windows Phone 7 issue

    - by RoguePlanetoid
    I have a problem, I have written a simple Media Player for Windows Phone 7 and can Play, Stop and control the Volume of a Video (loaded from a URI) however when I try to set the position, this causes the application to freeze. I have used both these lines, but either does not work: Player.Position = new TimeSpan(0, 0, 0, 0, (int)Position.Value); Player.Position = TimeSpan.FromSeconds((int)(Position.Value)); I do have this event handler: void Player_MediaOpened(object sender, RoutedEventArgs e) { Position.Maximum = Player.NaturalDuration.TimeSpan.TotalMilliseconds; } And have tried using the Seconds value, casting to Ints etc, however everytime I try to set the Position, the app freezes. The video otherwise plays normally - anyone know what the problem may be here?

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  • ASP .NET: SQL Server Money Type and .NET Currency Type

    - by Rudi Ramey
    MS SQL Server's Money Data Type seems to accept a well formatted currency value with no problem (example: $52,334.50) From my research MS SQL Sever just ignores the "$" and "," characters. ASP .NET has a parameter object that has a Type/DbType property and Currency is an available option to set as a value. However, when I set the parameter Type or DbType to currency it will not accept a value like $52,334.50. I receive an error "Input string was not in a correct format." when I try to Update/Insert. If I don't include the "$" or "," characters it seems to work fine. Also, if I don't specify the Type or DbType for the parameter it seems to work fine also. Is this just standard behavior that the parameter object with its Type set to currency will still reject "$" and "," characters in ASP .NET? Here's an example of the parameter declaration (in the .aspx page): <asp:Parameter Name="ImplementCost" DbType="Currency" />

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  • How to inherit from DataAnnotations.ValidationAttribute (it appears SecureCritical under Visual Stud

    - by codetuner
    Hi, I have an [AllowPartiallyTrustedCallers] class library containing subtypes of the System.DataAnnotations.ValidationAttribute. The library is used on contract types of WCF services. In .NET 2/3.5, this worked fine. Since .NET 4.0 however, running a client of the service in the Visual Studio debugger results in the exception "Inheritance security rules violated by type: '(my subtype of ValidationAttribute)'. Derived types must either match the security accessibility of the base type or be less accessible." (System.TypeLoadException) The error appears to occure only when all of the following conditions are met: a subclass of ValidationAttribute is in an AllowPartiallyTrustedCallers assembly reflection is used to check for the attribute the Visual Studio hosting process is enabled (checkbox on Project properties, Debug tab) So basically, in Visual Studio.NET 2010: create a new Console project, add a reference to "System.ComponentModel.DataAnnotations" 4.0.0.0, write the following code: . using System; [assembly: System.Security.AllowPartiallyTrustedCallers()] namespace TestingVaidationAttributeSecurity { public class MyValidationAttribute : System.ComponentModel.DataAnnotations.ValidationAttribute { } [MyValidation] public class FooBar { } class Program { static void Main(string[] args) { Console.WriteLine("ValidationAttribute IsCritical: {0}", typeof(System.ComponentModel.DataAnnotations.ValidationAttribute).IsSecurityCritical); FooBar fb = new FooBar(); fb.GetType().GetCustomAttributes(true); Console.WriteLine("Press enter to end."); Console.ReadLine(); } } } Press F5 and you get the exception ! Press Ctrl-F5 (start without debugging), and it all works fine without exception... The strange thing is that the ValidationAttribute will or will not be securitycritical depending on the way you run the program (F5 or Ctrl+F5). As illustrated by the Console.WriteLine in the above code. But then again, this appear to happen with other attributes (and types?) too. Now the questions... Why do I have this behaviour when inheriting from ValidationAttribute, but not when inheriting from System.Attribute ? (Using Reflector I don't find special settings on the ValidationAttribute class or it's assembly) And what can I do to solve this ? How can I keep MyValidationAttribute inheriting from ValidationAttribute in an AllowPartiallyTrustedCallers assembly without marking it SecurityCritical, still using the new .NET 4 level 2 security model and still have it work using the VS.NET debug host (or other hosts) ?? Thanks a lot! Rudi

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  • Ending a Rails 2 URL with an IP address causes routing error?

    - by Dave Williams
    I'm trying to construct URLs in the format http://servername/find/by/CRITERION/VALUE CRITERION is a finite set of strings, as is VALUE. Trouble is, VALUE needs to be an IP address in some situations, and it's causing me a routing error. Here's my route: map.find 'find/by/:criterion/:query', :controller => "find", :action => "by" And the error, from the Mongrel logs: Processing ApplicationController#index (for 127.0.0.1 at 2010-05-07 10:20:32) [GET] ActionController::RoutingError (No route matches "/find/by/ip/1.2.3.4" with {:method=>:get}): Rendering rescues/layout (not_found) If I visit /find/by/foo/bar or /find/by/foo/1234 I don't have problems. I suspect the problem might be Rails' inference of MIME types based on periods in the URL, but I don't really know how I can disable that. I've tried passing a :defaults = {:format = :html} to the route but that causes Mongrel to fail to start entirely. Any help appreciated!

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  • XAML trigger as StaticResource

    - by adrianm
    Why can't I create a trigger and use it as a static resource in XAML? <Window.Resources> <Trigger x:Key="ValidationTrigger" x:Shared="False" Property="Validation.HasError" Value="true"> <Setter Property="FrameworkElement.ToolTip" Value="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=(Validation.Errors)/ErrorContent}"/> </Trigger> <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource {x:Type TextBox}}"> <Style.Triggers> <StaticResource ResourceKey="ValidationTrigger"/> </Style.Triggers> </Style> </Window.Resources> I get an errormessage at runtime "Value cannot be null. Parameter name: triggerBase Error at object 'System.Windows.Markup.StaticResourceHolder' in markup file"

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  • delphi insert update record´s

    - by ml
    Hi friends what is that im doing wrong because it goes and goes on LOOP var ii: Integer; i: Integer; j: Integer; ie : integer; je : integer; fileSource, fileDest: string; Fo : TSHFileOpStruct; buffer : array[0..4096] of char; p : pchar; dirFile: String; dirFile1: String; dirFile11: String; begin dirFile1 := (Dirlocal + 'Vibrometria\'+ClienteN.text+'\'); dirFile := (localAplicação+ 'Vibrometria\'+ClienteN.text+'\'+NInterv.text ) ; dirFile11:= Dirlocal+'Vibrometria\'; if ForceDirectories(dirFile11) then if ForceDirectories(dirFile1) then //...................................................................... begin ShowMessage('Vai devolver "'+cxDBTextEdit5.Text+'..........' +obra.Text); Sub_TRelFinal.First; Begin ADOTable_casa.First; Begin begin Sub_TRelFinal.Edit; //Tabela1Codoco.Value := Tabela2Codoco.Value; Sub_TRelFinal.FieldByName('Foto1').text := ADOTable_casa.FieldByName('Foto1').text; Sub_TRelFinal.FieldByName('Obra').text := ADOTable_casa.FieldByName('Obra').text; Sub_TRelFinal.FieldByName('OBS1').text := ADOTable_casa.FieldByName('OBS1').text; Sub_TRelFinal.FieldByName('Data_VisitaLocal').text := ADOTable_casa.FieldByName('Data_VisitaLocal').text; Sub_TRelFinal.FieldByName('ContractoN').text := ADOTable_casa .FieldByName('ContractoN').text;; Sub_TRelFinal.FieldByName('Cliente').text := ADOTable_casa .FieldByName('Cliente').text; Sub_TRelFinal.FieldByName('Morada').text := ADOTable_casa .FieldByName('Morada').text; Sub_TRelFinal.FieldByName('localizacao').text:= ADOTable_casa .FieldByName('localizacao').text; Sub_TRelFinal.FieldByName('Intruducao').text:= ADOTable_casa .FieldByName('Intruducao').text; Sub_TRelFinal.FieldByName('Analise').text := ADOTable_casa.FieldByName('Analise').text; Sub_TRelFinal.Post; end; End; end; //iniciar inserção registos sub Sub_TRelFinal_1.First; For j := 1 to Sub_TRelFinal_1.RecordCount do Begin ADOTable_casa_sub_1.First; For i := 1 To ADOTable_casa_sub_1.RecordCount Do Begin begin Sub_TRelFinal_1.Edit; //Tabela1Codoco.Value := Tabela2Codoco.Value; Sub_TRelFinal_1.FieldByName('Foto1').text := ADOTable_casa_sub_1.FieldByName('Foto1').text; Sub_TRelFinal_1.FieldByName('Obra').text := ADOTable_casa_sub_1.FieldByName('Obra').text; Sub_TRelFinal_1.FieldByName('OBS1').text := ADOTable_casa_sub_1.FieldByName('OBS1').text; Sub_TRelFinal_1.FieldByName('Data_VisitaLocal').text := ADOTable_casa_sub_1.FieldByName('Data_VisitaLocal').text; Sub_TRelFinal_1.FieldByName('ContractoN').text := ADOTable_casa_sub_1.FieldByName('ContractoN').text; Sub_TRelFinal_1.FieldByName('Cliente').text := ADOTable_casa_sub_1.FieldByName('Cliente').text; Sub_TRelFinal_1.FieldByName('Morada').text := ADOTable_casa_sub_1.FieldByName('Morada').text; Sub_TRelFinal_1.FieldByName('localizacao_eq').text:= ADOTable_casa_sub_1.FieldByName('localizacao_eq').text; Sub_TRelFinal_1.FieldByName('Equipamento').text:= ADOTable_casa_sub_1.FieldByName('Equipamento').text; Sub_TRelFinal_1.FieldByName('tipo_equip').text := ADOTable_casa_sub_1.FieldByName('tipo_equip').text; Sub_TRelFinal_1.Post; end; //iniciar inserção registos subsub SubTRelFinal_sub.First; For ie := 1 to SubTRelFinal_sub.RecordCount do Begin ADOTable_casa_sub_Sub.First; For je := 1 To ADOTable_casa_sub_Sub.RecordCount Do begin SubTRelFinal_sub.Edit; //Tabela1Codoco.Value := Tabela2Codoco.Value; SubTRelFinal_sub.FieldByName('Foto1').text := ADOTable_casa_sub_Sub.FieldByName('Foto1').text; SubTRelFinal_sub.FieldByName('Foto2').text := ADOTable_casa_sub_Sub.FieldByName('Foto2').text; SubTRelFinal_sub.FieldByName('Analisefoto1').text := ADOTable_casa_sub_Sub.FieldByName('Analisefoto1').text; SubTRelFinal_sub.FieldByName('Observações').text := ADOTable_casa_sub_Sub.FieldByName('Observações').text;; SubTRelFinal_sub.FieldByName('ContractoN').text := ADOTable_casa_sub_Sub.FieldByName('ContractoN').text; SubTRelFinal_sub.FieldByName('OBS3').text := ADOTable_casa_sub_Sub.FieldByName('OBS3').text; SubTRelFinal_sub.FieldByName('OBS4').text := ADOTable_casa_sub_Sub.FieldByName('OBS4').text; SubTRelFinal_sub.FieldByName('OBS2').text := ADOTable_casa_sub_Sub.FieldByName('OBS2').text; SubTRelFinal_sub.FieldByName('OBS1').text := ADOTable_casa_sub_Sub.FieldByName('OBS1').text; SubTRelFinal_sub.FieldByName('Localização').text := ADOTable_casa_sub_Sub.FieldByName('Localização').text; SubTRelFinal_sub.FieldByName('Tipo_equipamento').text:= ADOTable_casa_sub_Sub.FieldByName('Tipo_equipamento').text; SubTRelFinal_sub.FieldByName('Analisefoto101').text:= ADOTable_casa_sub_Sub.FieldByName('Analisefoto101').text; SubTRelFinal_sub.FieldByName('Analisefoto201').text := ADOTable_casa_sub_Sub.FieldByName('Analisefoto201').text; SubTRelFinal_sub.FieldByName('GrauAnomalia').text := ADOTable_casa_sub_Sub.FieldByName('GrauAnomalia').text; SubTRelFinal_sub.Post; end; ADOTable_casa_sub_Sub.Next; End; SubTRelFinal_sub.Next; End; ADOTable_casa_sub_1.Next; End; Sub_TRelFinal_1 .Next;

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  • Serializing data using IEnumerable<T> with WebGet

    - by Jim
    possible duplicate: Cannot serialize parameter of type ‘System.Linq.Enumerable… ’ when using WCF, LINQ, JSON Hi, If my method signiature looks like this, it works fine. [WebGet] MyClass[] WebMethod() If the signiature looks like this [WebGet] IEnumerable<T> WebMethod() I get the following error: Cannot serialize parameter of type 'X.Y.Z.T+<WebMethod>d__2c' (for operation 'WebMethod', contract 'IService') because it is not the exact type 'System.Collections.Generic.IEnumerable`1[X.Y.Z.T]' in the method signature and is not in the known types collection. In order to serialize the parameter, add the type to the known types collection for the operation using ServiceKnownTypeAttribute. I have tried adding. ServiceKnownType(typeof(IEnumerable)) Same error. Is this a bug in 2010 beta 2, or is this likely to be correct going forward? Thanks

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  • Can I check the validity of a single DataMapper property?

    - by Nathan Long
    In a custom DataMapper setter, I'd like to check whether the value I'm setting is valid or not. For instance: class ToastMitten include DataMapper::Resource property :id, Serial property :wearer, Enum['Chuck Norris', 'Jon Skeet'] property :first_worn_at, DateTime def wearer=(name) super if wearer.valid? # How can I do this? first_worn_at = Time.now end end end t = ToastMitten.new t.wearer = 'Nathan Long' # invalid value; do NOT set first_worn_at t.wearer = 'Jon Skeet' # valid value; set first_worn_at Can I check the validity of a single property like this without calling valid? on the object itself and looking through all the errors?

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  • Read cookies in silverlight

    - by Dharam Narayan
    hi, I have an ASP.NET MVC application. In this after user get Sign in .We set the a cookie for the user who logged in using FormsAuthentication.SetAuthCookie(userName, false). In other page we get the Cookies using the FormsAuthentication.GetAuthCookie(userName]) . This cookie values as string is then set in the Response.Cookies["username"].Value = cookiesvalue . We have .aspx page in the same application that downloads silverlight application .Silverlight reads the cookies using the code string[] cookies = HtmlPage.Document.Cookies.Split(';'); The problem is that once session expires in the application,silverlight cannot read the cookie value. After the session expires we again set the cookies in headers using the Response.Cookies["username"].Value = cookiesvalue . But still silverlight application cannot read this cookie . Thanks in Advance DNM

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  • Cassandra/HBase or just MySQL: Potential problems doing the next thing

    - by alexeypro
    Say I have "user". It's the key. And I need to keep "user count". I am planning to have record with key "user" and value "0" to "9999+ ;-)" (as many as I'll have). What problems I will drive in if I use Cassandra, HBase or MySQL for that? Say, I have thousand of new updates to this "user" key, where I need to increment the value. Am I in trouble? Locked for writes? Any other way of doing that? Why this is done -- there will be a lot of "user"-like keys. Different other cases. But the idea is the same. Why keep it this way -- because I'll have more reads, so I can always get "counted value" very fast.

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  • jquery select item in radiobuttonlist via client-side function

    - by mcliedtk
    I have the following ASP.NET RadioButtonList: <asp:RadioButtonList ID="rbl" runat="server"> <asp:ListItem Text="Type1" Value="1" /> <asp:ListItem Text="Type2" Value="2" /> </asp:RadioButtonList> I would like to select an item in the list programmatically via a client-side jquery function like this (simplified version): function BindWidget(widget) { // Type property of Widget is an int. $("#<%=rbl.ClientID%>").selectItemByValue(widget.Type); } Ideally, there is some function - in the above code I have proposed selectItemByValue - that selects an item in a RadioButtonList by a given value. Does jquery have a similar function built-in? If not, how should I go about implementing the desired functionality?

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