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  • image processing

    - by miplz
    Hi, i'm doing a image processing programme using VB. i need to read a characters from my image and display in my programme. can anyone please tell me what type of method can i use??

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  • How can I refactor out needing so many for-loops in rails?

    - by Angela
    I need help refactoring this multi-loop thing. Here is what I have: Campaign has_many Contacts Campaign also has many templates for EVent (Email, Call, and Letter). I need a list of all the Emails, Calls and Letters that are "overdue" for every Contact that belongs to a Campaign. Overdue is determined by a from_today method which looks at the date the Contact was entered in the system and the number of days that needs to pass for any given Event. from_today() outputs the number of days from today that the Event should be done for a given Contact. Here is what I've done, it works for all Emails in a Campaign across all contacts. I was going to try to create another each do loop to change the class names. Wasn't sure where to begin: named_scope, push some things into a method, etcetera, or -- minimum to be able to dynamically change the class names so at least it loops three timees across the different events rather than repeating the code three times: <% @campaigns.each do |campaign| %> <h2><%= link_to campaign.name, campaign %></h2> <% @events.each do |event| %> <%= event %> <% for email in campaign.emails %> <h4><%= link_to email.title, email %> <%= email.days %> days</h4> <% for contact in campaign.contacts.find(:all, :order => "date_entered ASC" ) %> <% if (from_today(contact, email.days) < 0) %> <% if show_status(contact, email) == 'no status'%> <p> <%= full_name(contact) %> is <%= from_today(contact,email.days).abs%> days overdue: <%= do_event(contact, email) %> </p> <% end %> <% end %> <% end %> <% end %> <% end %> <% end %>

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  • Getting custom attribute from an Exception thrown during testing

    - by Amit Bhargava
    I'm using JUnit4 to test my code. Now, I'm aware that the following annotation allows me to expect an exception of a certain type @Test(expected = NipException.class) However, I have an 'errorCode' property in my exception class which I would also like to verify. This is because the same exception is thrown at three places in the same method with different error codes. How do I access 'errorCode' of the thrown exception?

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  • Python: Convert a string to an integer

    - by Adam Nelson
    Does anybody have a quickie for converting an unsafe string to an int? The string typically comes back as: '234\r\n' or something like that. In this case I want 234. If '-1\r\n', I want -1. I never want the method to fail but I don't want to go so far as try, except, pass just to hide errors either (in case something extreme happens).

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  • Problems with asp:Button OnClick event...

    - by Matt
    Hi, Here is my button <asp:Button ID="myButton" Text="Click Me" OnClick="doSomething(10)" runat="server" /> Here is the server function public void doSomething(int num) { int someOtherNum = 10 + num; } When I try to compile the code I get the error "Method Name Expected" for the line: <asp:Button ID="myButton" Text="Click Me" OnClick="doSomething(10)" runat="server" /> What am I doing wrong? Am I not allowed to pass values to the server from an OnClick event?

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  • Check if BigInteger is not a perfect square

    - by Ender
    I have a BigInteger value, let's say it is 282 and is inside the variable x. I now want to write a while loop that states: while b2 isn't a perfect square: a ? a + 1 b2 ? a*a - N endwhile How would I do such a thing using BigInteger? EDIT: The purpose for this is so I can write this method. As the article states one must check if b2 is not square.

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  • android mobile development performance vs extensibility

    - by mixm
    im developing a game in android, and i've been thinking about subdividing many of the elements of the game (e.g. game objects) into separate classes and sub-classes. but i know that method calls to these objects will cause some overhead. would it be better to improve performance or to improve extensibility?

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  • Where is the PyGTK event stack?

    - by mkotechno
    You can know if the event stack is empty calling the gtk.events_pending() method, but I want to manipulate the pending events and filter it before the next gtk loop cycle, this data must be stored somewhere as an attribute or something, but where? Thanks.

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  • initializing variables in ActiveRecord's classes

    - by Hadi
    How to initialize variables in ActiveRecord class? Variables here is the variables that are outside the scope of database such as: class Product attr_accessor :used end I want to initially assign @used initially to false, later if some person access the product, i will change @used to true First i thought of putting @used=false in initialize method, but it does not get called.

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  • Impossible to use ref and out in Extension methods?

    - by Hun1Ahpu
    Why is it forbidden to call Extension method with ref modifier? This one is possible: public static void Change(ref TestClass testClass, TestClass testClass2) { testClass = testClass2; } And this one not: public static void ChangeWithExtensionMethod(this ref TestClass testClass, TestClass testClass2) { testClass = testClass2; } But why?

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  • Rails 3 Nested Forms with datamapper

    - by jens freudenau
    i have two models: class MeetingPoint include DataMapper::Resource belongs_to :profile property :id, Serial property :lat, String end and class Profile include DataMapper::Resource has n, :meeting_points property :id, Serial property :distance, Text property :created_at, DateTime property :updated_at, DateTime end Now I create a form to edit the profile and the meeting_poing: = form_for @profile do |f| = f.text_field :distance = f.fields_for :meeting_points do |ff| = ff.text_field :lat = f.submit But when I want to save the values I get always the error: "undefined method `readonly?' for ["lat", "14.000"]:Array"

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  • Androids Facebook SDK, single sign on question?

    - by Joakim Engstrom
    On Androids Facebook SDK there is a single login feature which I can't get to work. Done all the key hash thing but maybe there is something wrong with this method. What exactly should I pass on, or could somebody explain what this is supposed to do? @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { facebook.authorizeCallback(requestCode, resultCode, data); }

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  • Is it possible to move the stage in actionscript 3.0?

    - by Joe.F
    Hi to keep it short and simple let's say I have a stage with 400x400 size in pixels, but I've drawn a map of 1000x1000 size in pixels. I want my player to be able to "walk" about the stage, but it appears stage.x and stage.y are read-only? Is there any method or way to have the stage "scroll" about, without having to move each object on the map? Thanks!

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  • Share xml-documentation accross overloads

    - by Kurresmack
    Hey, is there a way to share xml-documentation of the parameters to all the overloads? Lets say I have 10 overloads of a method but they all share the first 5 parameter (I use C# so I cannot have optional parameters). How do I do so that I do not have to write the same text for all of the parameters?

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  • Printing Instance ID to NSLog?

    - by fuzzygoat
    In the dealloc method for a class how would I print out the ID (or some other unique identifier) for the instance being deallocated? - (void)dealloc { NSLog(@"_deallocing: ??"); [super dealloc]; } Is this possible? I am just trying to get a little more feedback in the console as an aid to learning. many thanks -gary-

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  • Define interface for loading custom UserControls through reflection

    - by Tim
    I'm loading custom user controls into my form using reflection. I would like all my user controls to have a "Start" and "End" method so they should all be like: public interface IStartEnd { void Start(); void End(); } public class AnotherControl : UserControl, IStartEnd { public void Start() { } public void End() { } } I would like an interface to load through reflection, but the following obviously wont work as an interface cannot inherit a class: public interface IMyUserControls : UserControl, IInit, IDispose { }

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  • Flex PopUpManager: How can I detect the existence of a modal popup?

    - by Glenn
    My Flex 3 application has some modal dialogs displayed via the PopUpManager, but there are times when I'd like other view components to know there is popup displayed. The PopUpManager doesn't have any method for actually checking the existence of popups. Is there any other way to detect this in flash/flex without writing my own global manager? (also systemManager.popUpChildren.numChildren == 0 even when there's a modal popup) Cheers.

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  • FTP server returned 500 error with ASP.NET C#

    - by ffffff
    I 'm developing FTP exe ASP.NET?C#2.0 . but I FTP server returned 500 error FtpWebRequest myReq; FtpWebResponse myRes; myReq = (FtpWebRequest)WebRequest.Create("ftp://test/aaa.txt"); myReq.Credentials = new NetworkCredential("xxxx", "xxxx"); myReq.Method = WebRequestMethods.Ftp.DownloadFile; myRes = (FtpWebResponse)myReq.GetResponse(); // here error occured What's wrong?

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