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• Why wouldn't I be able to establish a trust relationship for a SSL/TLS channel?

  - by Abe Miessler

  I have a piece of .NET code that is erroring out when it makes a call to HTTPWebRequest.GetRequestStream. Here is the error message: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. I've read a few things that suggest that I might need a certificate on the machine running the code, but i'm not sure if that's true or how to do it. If I need to get a certificate, how do I do it? Code: var request = (HttpWebRequest)HttpWebRequest.Create(requestUrl); //my url request.Method = StringUtilities.ConvertToString(httpMethod); // Set the http method GET, POST, etc. if (postData != null) { request.ContentLength = postData.Length; request.ContentType = contentType; using (var dataStream = request.GetRequestStream()) { dataStream.Write(postData, 0, postData.Length); } }

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• Generating link path with parameters

  - by fl00r

  Hi. I've got model with many associations. User :has_many = :posts, :videos, :images etc I've got helper method, which receives one of this association draw_chart user.videos def draw_chart(assoc) assoc.each do |a| link_to "update", [a.user, a], :method => :put, :remote => true, :confirm => 'orrly?' end end Problem here is to send extra parameters to update action. For example I want to get this url: /users/1/videos/2?status=done but I am confused how to realize this while I am using [a.user, a] instead of user_videos_path(video, :status => 'done'). But I can't use last, because it can be either videos, or images or anything else

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• Simple Scala syntax - trying to define "==" operator - what am I missing?

  - by Alex R

  While experimenting with some stuff on the REPL, I got to a point where I needed something like this: scala class A(x:Int) { println(x); def ==(a:A) : Boolean = { this.x == a.x; } } Just a simple class with an "==" operator. Why doesn't it work??? Here's the result: :10: error: type mismatch; found : A required: ?{val x: ?} Note that implicit conversions are not applicable because they are ambiguous: both method any2ArrowAssoc in object Predef of type [A](x: A)ArrowAssoc[A] and method any2Ensuring in object Predef of type [A](x: A)Ensuring[A] are possible conversion functions from A to ?{val x: ?} class A(x:Int) { println(x); def ==(a:A) : Boolean = { this.x == a.x; } } ^ This is scala 2.8 RC1. Thanks

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• java servlet: difference between send redirect and forward in servlets

  - by Sanjeev

  I am using servlet there is two method redirect and forward both are send request to the same page but what is the difference between them.any idea

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• Struts2 action: how to know if HTTP request is GET or POST?

  - by Aleksey

  Is there a way to know in Struts2 action's method if this is GET or POST request?

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• speed up calling lot of entities, and getting unique values, google app engine python

  - by user291071

  OK this is a 2 part question, I've seen and searched for several methods to get a list of unique values for a class and haven't been practically happy with any method so far. So anyone have a simple example code of getting unique values for instance for this code. Here is my super slow example. class LinkRating2(db.Model): user = db.StringProperty() link = db.StringProperty() rating2 = db.FloatProperty() def uniqueLinkGet(tabl): start = time.time() dic = {} query = tabl.all() for obj in query: dic[obj.link]=1 end = time.time() print end-start return dic My second question is calling for instance an iterator instead of fetch slower? Is there a faster method to do this code below? Especially if the number of elements called be larger than 1000? query = LinkRating2.all() link1 = 'some random string' a = query.filter('link = ', link1) adic ={} for itema in a: adic[itema.user]=itema.rating2

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• CoreData: Sort and Section on Relationships

  - by David.Chu.ca

  I have two questions about using Core Data. Taking the typical case of Employee and Department as an example. The Employee entity has a relationship field "deparment" as to-one to Department, and the Department entity has a relationship "employee" as to-many to Employee entity. I would like to display all the employees in a TableView in sections of department's names. I think that the NSFetchedResultsController should use Employee as entity. I am not sure how to use Department's name as a sort criteria, since it is in an employee's relationship field department's name. Can you use "DepartmentName" as a sort and add this to Employee entity class as a method which will return department's name for a given employee? The second question is the section name. I would like to use department names as sections. Can I use the above method as sectionKeyPath's value for the NSFethedResultsController? Not sure if I am on the right track.

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• Help modifying QuartzDemo example application

  - by BittenApple

  Can anyone please, oh sweet pain, please take me out of my misery by writing a simple example on how the heck you pass a number (int value) which gets created in 1 .m file to another .m file. In the apple demo application called QuartzDemo, there is a file called QuartzImages.m This file has the following line of code: [CODE]CGPDFPageRef page = CGPDFDocumentGetPage(pdf, 1);[/CODE] Notice the (pdf, 1) in that line. This number should be replaced with an integer variable. Now, there is also a file called MainViewController.m. In that file, there is a method? called -(void)viewDidLoad In that method, I want to assign a number to the integer variable which would replace the damn "1" with whatever number I want. I have been pulling my hair trying to get this done, reading beginning iPhone 3 Development book, dev documentation and God knows what not, without results. Any help would be greatly appreciated... Sigh.

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• Combinatoric 'N choose R' in java math?

  - by Aly

  Is there a built in method in a java library that can compute 'N choose R' for any N, R?

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• Print out the variable name objective-C

  - by vodkhang

  Continued from the last question here: Log method name in Obj-C . I just wondered if there is a way to print out the variable name as well. For example: NSString *name = "vodkhang"; NCLog(@"%@", name); and I hope that the output should be: name: vodkhang Just to summarize the previous post, currently, I can print out the class name, method name and the line number when I call NCLog(@"Hello World"); <ApplicationDelegate:applicationDidFinishLaunching:10>Hello world with #define NCLog(s, ...) NSLog(@"<%@:%d> %@", __FUNCTION__, __LINE__, [NSString stringWithFormat:(s), ##__VA_ARGS__])

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• Assign multiple css classes to a table element in Rails

  - by Eric K

  I'm trying to style a table row using both cycle and a helper, like shown: <tr class= <%= cycle("list-line-odd #{row_class(item)}", "list-line-even #{row_class(item)}")%> > However, when I do this, the resulting HTML is: <tr class = "list-line-odd" lowest-price> with the return from the helper method not enclosed in the quotes, and therefore not recognized. Here's the helper I'm using: def row_class(item) if item.highest_price > 0 and item.lowest_price > 0 and item.highest_price != item.lowest_price if item.current_price >= item.highest_price "highest-price" elsif item.current_price <= item.lowest_price "lowest-price" end end end I must be missing something obvious, but I just can't figure out how to wrap both the result of cycle and the helper method return in the same set of quotes. Any help would be greatly appreciated!

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• Simple Serialization Faster Than JSON? (in Ruby)

  - by Sinan Taifour

  I have an application written in ruby (that runs in the JRuby VM). When profiling it, I realized that it spends a lot (actually almost all of) its time converting some hashes into JSON. These hashes have keys of symbols, values of other similar hashes, arrays, strings, and numbers. Is there a serialization method that is suitable for such an input, and would typically run faster than JSON? It would preferable if it is has a Java or JRuby-compatible gem, too. I am currently using the jruby-json gem, which is the fastest JSON implementation in JRuby (as I am told), so the move will most likely be to a different serialization method rather than just a different library. Any help is appreciated! Thanks.

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• Can't remove first node in linked list

  - by carlmonday

  I'm trying to make a linked list class in python (pointless I know, but it's a learning exercise), and the method I have written to remove a node doesn't work if I try to remove the first element of the linked list. If the node to be removed is anywhere else in the linked list the method works fine. Can someone give me some insight as to where I've gone wrong? Here's my code thus far: class Node: def __init__(self, data=None, next=None): self.data = data self.next = next def __repr__(self): return repr(self.data) def printNodes(self): while self: print self.data self = self.next def removeNode(self, datum): """removes node from linked list""" if self.data == datum: return self.next while self.next: if self.next.data == datum: self.next = self.next.next return self self = self.next

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• Transferring binary file from web server to client

  - by Yan Cheng CHEOK

  Usually, when I want to transfer a web server text file to client, here is what I did import cgi print "Content-Type: text/plain" print "Content-Disposition: attachment; filename=TEST.txt" print filename = "C:\\TEST.TXT" f = open(filename, 'r') for line in f: print line Works very fine for ANSI file. However, say, I have a binary file a.exe (This file is in web server secret path, and user shall not have direct access to that directory path). I wish to use the similar method to transfer. How I can do so? What content-type I should use? Using print seems to have corrupted content received at client side. What is the correct method?

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• ASP.NET profile deletion

  - by Ben Aston

  We use the ASP.NET profile subsystem to associate key-value pairs of information with users. I am implementing functionality for the deletion of users. I have been using the ProfileManager.DeleteProfile(string userName) method, but I have noticed that this leaves a row in the aspnet_Users table in the aspnetdb database we use to store the profile information. Clearly, I could manipulate the database directly, but I am reluctant to do so. What is the best way to ensure all information assocaited with a user is deleted from the aspnetdb? PS: there is a tantalising Membership.DeleteUser(string userName, bool deleteEverything) method, but this returns a database connection error. A web.config issue?

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• Java Webservice with generic methods

  - by danby

  Hi, I was wondering if it is possible to make a generic webservice method in java like this: @WebMethod public <T extends Foo> void testGeneric(T data){ However when I try to consume this with a Java client I get an error stating: [ERROR] Schema descriptor {http://####/}testGeneric in message part "parameters" is not defined and could not be bound to Java. I know it is possible to make a method that takes a parameter such as List and this generates correctly using JAX-WS. I don't mind if there is a solution that means I am tied to using only a particular technology. Thanks, Dan.

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• How do I avoid boxing/unboxing when extending System.Object?

  - by Robert H.

  I'm working on an extension method that's only applicable to reference types. I think, however, it's currently boxing and unboxing the the value. How can I avoid this? namespace System { public static class SystemExtensions { public static TResult GetOrDefaultIfNull<T, TResult>(this T obj, Func<T, TResult> getValue, TResult defaultValue) { if (obj == null) return defaultValue; return getValue(obj); } } } Example usage: public class Foo { public int Bar { get; set; } } In some method: Foo aFooObject = new Foo { Bar = 1 }; Foo nullReference = null; Console.WriteLine(aFooObject.GetOrDefaultIfNull((o) => o.Bar, 0)); // results: 1 Console.WriteLine(nullReference.GetOrDefaultIfNull((o) => o.Bar, 0)); // results: 0

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• Collectable<T> serialization, Root Namespaces on T in .xml files.

  - by Stacey

  I have a Repository Class with the following method... public T Single<T>(Predicate<T> expression) { using (var list = (Models.Collectable<T>)System.Xml.Serializer.Deserialize(typeof(Models.Collectable<T>), FileName)) { return list.Find(expression); } } Where Collectable is defined.. [Serializable] public class Collectable<T> : List<T>, IDisposable { public Collectable() { } public void Dispose() { } } And an Item that uses it is defined.. [Serializable] [System.Xml.Serialization.XmlRoot("Titles")] public partial class Titles : Collectable<Title> { } The problem is when I call the method, it expects "Collectable" to be the XmlRoot, but the XmlRoot is "Titles" (all of object Title). I have several classes that are collected in .xml files like this, but it seems pointless to rewrite the basic methods for loading each up when the generic accessors do it - but how can I enforce the proper root name for each file without hard coding methods for each one? The [System.Xml.Serialization.XmlRoot] seems to be ignored.

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• Editing/Modifying a .java file programmatically? (not the .class file)

  - by Jay

  So, here is a piece of code using CodeModel that generates java code: JCodeModel cm = new JCodeModel(); JDefinedClass dc = cm._class("foo.Bar"); JMethod m = dc.method(0, int.class, "foo"); m.body()._return(JExpr.lit(5)); File f = new File("C:/target/classes"); f.mkdirs(); cm.build(f); This code generates a .java file: package foo; public class Bar { int foo() { return 5; } } However, I DO NOT want CodeModel to create a new java file for me. I do have a .java file already and would like to add a few lines of code to a method inside it. So, I would like the API to modify the java file directly/ create a modified copy of it. Is there a way to doing this?

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• What is the difference between binding data in data grid view methods ??

  - by Ashish

  What is the difference between binding data in data grid view methods ?? <ItemTemplate> <asp:LinkButton ID="lnkBtnUserName" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"UserFirstName")%>' CommandArgument='<%# Eval("UserID") %>' OnClick="lnkBtnUserName_Click" /> </ItemTemplate> and this second one <asp:TemplateField HeaderText="Employee ID"> <ItemTemplate> <asp:Label ID="lblempid" runat="server" Text='<%# Bind("EmpId.EmpId") %>'></asp:Label> </ItemTemplate> </asp:TemplateField> means in method 1 Text='<%# DataBinder.Eval(Container.DataItem,"UserFirstName")%>' CommandArgument='<%# Eval("UserID") %>' method 2 Text='<%# Bind("EmpId.EmpId") also explain use one this CommandArgument='<%# Eval("UserID") in 1st one ????

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• Getting Notifications in Background Mode iOS?

  - by Pau Senabre

  I'm trying to get Notifications in Background Mode by running a method every minute to see if there are new notifications. This works great in Active Mode, but I saw for background mode it is restricted to 7 keys. I enabled the Background Mode with the option Background Fetch, but seems like the method is being called but it's not complete. In AppDelegate I'm calling: - (void)applicationDidEnterBackground:(UIApplication *)application { //This has a Timer to execute every minute [self GetNotifications]; //This executes a NSMutableURLRequest *request //giving back the JSON data with the notifications } I would like to do something like Facebook does for Notifications. Any idea how to do this?

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• Caught AttributeError while rendering: 'str' object has no attribute '_meta'

  - by D_D

  def broadcast_display_and_form(request): if request.method == 'POST' : form = PostForm(request.POST) if form.is_valid(): post = form.cleaned_data['post'] obj = form.save(commit=False) obj.person = request.user obj.post = post obj.save() readers = User.objects.all() for x in readers: read_obj = BroadcastReader(person = x) read_obj.post = obj read_obj.save() return HttpResponseRedirect('/broadcast') else : form = PostForm() posts = BroadcastReader.objects.filter(person = request.user) return render_to_response('broadcast/index.html', { 'form' : form , 'posts' : posts ,} ) My template: {% extends "base.html" %} {% load comments %} {% block content %} <form action='.' method='POST'> {{ form.as_p }} <p> <input type="submit" value ="send it" /></input> </p> </form> {% get_comment_count for posts.post as comment_count %} {% render_comment_list for posts.post %} {% for x in posts %} <p> {{ x.post.person }} - {{ x.post.post }} </p> {% endfor %} {% endblock %}

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• Problem creating ODBC connection to SQL Server 2008 with Vista

  - by earlz

  Well, I'm trying to get a database schema thing working, first I tried just doing it in Linux where I'm more comfortable, but ODBC seems to be a hack there and I couldn't get it to work. So I figured it shouldn't be too hard in Windows.. Ok, so I created a SQL Server Client Alias so that I can simply same windowsserver to refer to my SQL server. Then, I went to the ODBC configuration in Control Panel. I clicked Add in the User DSN section. I chose Native SQL Server (10), and then clicked next. Then I typed a short name and a description and gave the servername as windowsserver/SQLEXPRESS Then, I click next, give it my user name and password and click next. Then, after like 2 minutes it says "Login Timeout Expired" What can be wrong here? I know the server is configured cause I have SQL Server Management Studio opened up with that server in it. I'm also just trying to connect over regular TCP/IP and my firewall is disabled.

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• How do I make lambda functions generic in Scala?

  - by Electric Coffee

  As most of you probably know you can define functions in 2 ways in scala, there's the 'def' method and the lambda method... making the 'def' kind generic is fairly straight forward def someFunc[T](a: T) { // insert body here what I'm having trouble with here is how to make the following generic: val someFunc = (a: Int) => // insert body here of course right now a is an integer, but what would I need to do to make it generic? val someFunc[T] = (a: T) => doesn't work, neither does val someFunc = [T](a: T) => Is it even possible to make them generic, or should I just stick to the 'def' variant?

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• Asp.net gridview MVC

  - by ozsenegal

  Can i create a gridview control in Asp.net MVC,and set its DataSource propertie and DataBind method,mormally as in web forms?

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