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  • How to create named pipe acsessible Only on your machin? (VS08 C++)

    - by Ole Jak
    Hello, I have created a program that write video stream to a named pipe on windows, using Visual Studio C++ 2008 . how to be sequre that no one exept programms on this computer can acsess this pipe? npipe = CreateNamedPipe("\\\\.\\pipe\\TestChannel", PIPE_ACCESS_DUPLEX, PIPE_TYPE_MESSAGE | PIPE_WAIT, PIPE_UNLIMITED_INSTANCES , 1024, 1024,5000,NULL);

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  • Can I set a timeout for a InputStream's read() function?

    - by Zombies
    I have a DataInputStream that I obtained from a Socket. Is there any way I can set a timeout for dis.read(...)? Currently I spawn a new thread to do the read. While the parent thread does a thread.join(timeout) to wait before interrupting it. I am aware of nio, but I don't think I want to refactor that much at this point. Thanks.

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  • How can I take any function as input for my Scala wrapper method?

    - by pr1001
    Let's say I want to make a little wrapper along the lines of: def wrapper(f: (Any) => Any): Any = { println("Executing now") val res = f println("Execution finished") res } wrapper { println("2") } Does this make sense? My wrapper method is obviously wrong, but I think the spirit of what I want to do is possible. Am I right in thinking so? If so, what's the solution? Thanks!

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  • How do I create a polymorphic model with a collection_select?

    - by muxe
    This are my models: class Speaker < ActiveRecord::Base belongs_to :session, :foreign_key => :session_id, :class_name => :Session belongs_to :speakable, :polymorphic => true end class Session < ActiveRecord::Base has_many :speakers accepts_nested_attributes_for :speakers end class Person < ActiveRecord::Base has_many :speakers, :as => :speakable end class Company < ActiveRecord::Base has_many :speakers, :as => :speakable end What I want to do now is something like this: app/views/sessions/edit.html.erb <% f.fields_for :speakers do |sf| %> <p> <%= sf.label :speaker %><br /> <%= sf.collection_select :speakable, Company.all + Person.all, :id, :full_name %> </p> <% end %> But it is not working because of the polymorphic assignment. How do I approach this problem? EDIT: The Error is: undefined method `base_class' for String:Class with params being: "speaker"=>{"speakable"=>"1063885469", "session_id"=>"1007692731"} The value passed to speakable is the id of the Speaker/Company. Yes, this is the value I specified the collection_select to return, but how can I manage to supply both values (speakable_id and speakable_type) ?

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  • Why can’t I create a database in an empty ASP MVC 2 project using Project->Add->New Item->SQL Server

    - by Dr Dork
    I'm diving head first into ASP MVC and am playing around with creating and manipulating a database. I did a search and found this tutorial for creating a database, however when I follow it, I get this error right at the start when trying to add a new database to my fresh, empty ASP MVC 2 project... A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) The only requirement the tutorial mentioned was SQL Server Express, but when I went to download it, it said it was already installed. I'm assuming it was part of the VS 2010 RC I installed and am running. So I don't know what else I need if I am missing something. This is all new to me, so I'm sure I'm missing something obvious here and after I'm done posting this question, I plan to do some more research into the topic of databases and how they work with ASP MVC. In the meantime, I was you could help me answer a couple high level questions... What am I missing/forgetting to do that is causing this error? Any suggestions for good resources/tutorials that focus on using databases with ASP MVC? I've done a lot of database programming in the past, so I'm familiar with the concepts of relational databases and the SQL language. I wish I could find a good resource for learning how to work with them in an ASP dev environment, as well as a good breakdown of all the related technologies used for working with them (i.e. LINQ to SQL). Thanks so much in advance for all your help! I'm going to start researching these questions right now.

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  • How can I create an Assembly program WITHOUT using libraries?

    - by Newbie
    Hello. I've literally only just started looking to learn Assembly language. I'm using the NASM assembler on Windows Vista. Usually, when I begin to learn a new language, I'll copy someone else's Hello World code and try to understand it line-by-line. However, I'm finding it suprisingy difficult to find a Hello World program that doesn't reference other libraries! You see, there's no point trying to understand each line of the code if it is closely linked with a whole library of additional code! One of the reasons I want to learn Assembly is so that I can have near complete control over the programs I write. I don't want to be depending on any libraries. And so my question is this: Can anyone give me NASM-compatible Assembly code to a completely stand-alone Hello World program that can output to the Windows Vista console? Alternatively, I appreciate that a library may be required to tell the pogram WHERE to print the output (ie. the Windows console). Other than that, I can't see why any libraries should be required. Am I overlooking anything?

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  • VS2010 Database Compare. How do you create a *.DBSchema extensioned file?

    - by George
    I'd like to take a snapshot of my database, make some changes and then use the db compare functionality to identify the changes, and who knows, maybe even generate scripts to make the change. I'd like to avoid having to backup the current db and restore it as a separate db just to have a "before" snapshot. I'm guessing I shouldn't have to. Obsviously, I'm clueless about db projects and am looking to be pointed in the right direction. ty!

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  • How do i create these borders in the middle?

    - by Nitesh Panchal
    Hello, I know how to generate rounded corners using images. But please have a look at the link :- http://roundedbox.andreas-kalt.de/ The rounded corners on all four corners are all images, but my question is how are those borders in the middle done? Those green color borders that surround the whole div. The tutorial is given but it is German :(. Also i don't want to use Css3 like -webkit-border-radius etc as they are not yet supported in IE Thanks in advance :)

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  • How to take a NSString such as, "0+1+2", get the sum of those and create new string. Obj-C

    - by Ace Legend
    Alright. My app has a text field and next to it are two buttons (Plus button and Equals button). When you press the "Plus" button, it takes the text inside of the textField and adds a "+" to it. Code below: - (IBAction)plusButtonPressed:(id)sender { NSString *plusString = @"+"; NSString *inputString = carbsField.text; NSString *outputString = [NSString stringWithFormat:@"%@%@",inputString,plusString]; NSLog(@"%@",outputString); [carbsField setText:outputString]; } I will eventually make that more intelligent so that I can't put two pluses or whatever. Anyway, then I want the equal button to take whatever is in the textField, which should look something like: "23+54+2.2" and get the sum of those values. I believe I know how to take an Integer and make it a String, but I want to verify it: int *value = 56; NSString *string = @"%d",value; Well, if anyone can show me how to do this, I would be very appreciative. Thanks. EDIT At the moment, I have not tried anything. This is because I do not know where to start. I have an idea of what to do, but I do not know how to execute it. I believe I need to get all characters before a "+" convert them into int and then get the sum of some array of those values.

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  • PHP & bash; Linux; Compile my own function

    - by flienteen
    Hi. I would like to make my own program but I have no idea how.. for example I want to make a typical 'Hello $user' program. So.. +-- hi ¦   +-- hi.sh ¦   +-- hi_to.sh hi.sh #!/bin/bash ~/hi/hi_to.sh $1 hi_to.sh #!/usr/bin/php <?php echo "\nHellO ".$argv[1]."\n"; ?> Run it in terminal: me:~/hi ? ./hi.sh User HellO User and my question is: how to compile all this files into one bash program?

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  • How to Create Adobe AIR MJPEG server? (AIR 2.0)

    - by Ole Jak
    So all I want to stream images from my WebCam onto some local adress\port and be able to see them as MJPEG stream. I want server (one that shares MJPEGS) and CLIENT (That sends MJPEGS) be in the same air app. Can you give me link to working opensource project DETAILED STEP BY STEP instructions on what should I do\implement and where to find code examples

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  • How to implement a private virtual function within derived classes?

    - by Dane
    Hi, I know why I want to use private virtual functions, but how exactly can I implement them? For example: class Base{ [...] private: virtual void func() = 0; [...] } class Derived1: puplic Base{ void func() { //short implementation is ok here } } class Derived2: puplic Base{ void func(); //long implementation elsewhere (in cpp file) } [...] void Derived2::func() { //long implementation } The first version is ok but not always possible. Isn't the second version simply name hiding? How do you define the Base::func() of Derived2, if you cannot do it within the class declaration of Dereived2? Thanks

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  • ios - how do I concatinate strings to create a url?

    - by GeekedOut
    I am trying to make a url by first collecting the parameters, and then in one statement creating the actual url. Here is what I am trying to do: NSString *urlString = @"http://www.some_login_url.com?email=%@&password=%@"; NSString *email = self.email.text; NSString *password = self.password.text; NSString *url_to_send = [NSString stringWithFormat:@"%@%@", urlString , email , password]; So what I wanted to do was replace the @ symbols with the values in the variables, but instead the second variable just got appended to the end of the string. How would I change the last line so I could put the right parameters in their correct spots? Thanks!!

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  • Failing rspec Rails Tutorial Chapter 9.3

    - by greyghost24
    I am failing 3 tests and I have found numerous examples on here and on on the internet in general but I can't seem to find where I'm going wrong. Thanks for any help. 1) User pages signup with valid information edit page Failure/Error: before { visit edit_user_path(user) } ActionView::Template::Error: undefined method `model_name' for NilClass:Class # ./app/views/users/edit.html.erb:6:in `_app_views_users_edit_html_erb___4113112884365867193_70232486166220' # ./spec/requests/user_pages_spec.rb:96:in `block (5 levels) in <top (required)>' 2) User pages signup with valid information edit page Failure/Error: before { visit edit_user_path(user) } ActionView::Template::Error: undefined method `model_name' for NilClass:Class # ./app/views/users/edit.html.erb:6:in `_app_views_users_edit_html_erb___4113112884365867193_70232486166220' # ./spec/requests/user_pages_spec.rb:96:in `block (5 levels) in <top (required)>' 3) User pages signup with valid information edit page Failure/Error: before { visit edit_user_path(user) } ActionView::Template::Error: undefined method `model_name' for NilClass:Class # ./app/views/users/edit.html.erb:6:in `_app_views_users_edit_html_erb___4113112884365867193_70232486166220' # ./spec/requests/user_pages_spec.rb:96:in `block (5 levels) in <top (required)>' Finished in 0.26515 seconds 3 examples, 3 failures Failed examples: rspec ./spec/requests/user_pages_spec.rb:100 # User pages signup with valid information edit page rspec ./spec/requests/user_pages_spec.rb:99 # User pages signup with valid information edit page rspec ./spec/requests/user_pages_spec.rb:101 # User pages signup with valid information edit page authentication_pages_spec.rb require 'spec_helper' describe "Authentication" do subject { page } describe "signin page" do before { visit signin_path } it { should have_selector('h1', text: 'Sign in') } it { should have_selector('title', text: 'Sign in') } end describe "signin" do before { visit signin_path } describe "with invalid information" do before { click_button "Sign in" } it { should have_selector('title', text: 'Sign in') } it { should have_selector('div.alert.alert-error', text: 'Invalid') } describe "after visiting another page" do before { click_link "Home" } it { should_not have_selector('div.alert.alert-error') } end end describe "with valid information" do let(:user) { FactoryGirl.create(:user) } before do fill_in "Email", with: user.email fill_in "Password", with: user.password click_button "Sign in" end it { should have_selector('title', text: user.name) } it { should have_link('Profile', href: user_path(user)) } it { should have_link('Sign out', href: signout_path) } it { should_not have_link('Sign in', href: signin_path) } describe "followed by signout" do before { click_link "Sign out" } it { should have_link('Sign in') } end end end end Here is the users_controller: class UsersController < ApplicationController def show @user = User.find(params[:id]) end def new @user = User.new end def create @user = User.new(params[:user]) if @user.save sign_in @user flash[:success] = "Welcome to the Sample App!" redirect_to @user else render 'new' end end end def edit @user = User.find(params[:id]) end edit.html.erb: <% provide(:title, "Edit user") %> <h1>Update your profile</h1> <div class="row"> <div class="span6 offset3"> <%= form_for(@user) do |f| %> <%= render 'shared/error_messages' %> <%= f.label :name %> <%= f.text_field :name %> <%= f.label :email %> <%= f.text_field :email %> <%= f.label :password %> <%= f.password_field :password %> <%= f.label :password_confirmation, "Confirm Password" %> <%= f.password_field :password_confirmation %> <%= f.submit "Save changes", class: "btn btn-large btn-primary" %> <% end %> <%= gravatar_for @user %> <a href="http://gravatar.com/emails">change</a> </div> here is the user_pages_spec: require 'spec_helper' describe "User pages" do subject { page } describe "profile page" do let(:user) { FactoryGirl.create(:user) } before { visit user_path(user) } it { should have_selector('h1', text: user.name) } it { should have_selector('title', text: user.name) } end describe "signup page" do before { visit signup_path } it { should have_selector('h1', text: 'Sign up') } it { should have_selector('title', text: full_title('Sign up')) } end describe "signup" do before { visit signup_path } describe "with invalid information" do it "should not create a user" do expect { click_button "Create my account" }.not_to change(User, :count) end describe "error messages" do before { click_button "Create my account" } it { should have_selector('title', text: 'Sign up') } it { should have_content('error') } end end describe "with valid information" do before do fill_in "Name", with: "Example User" fill_in "Email", with: "[email protected]" fill_in "Password", with: "foobar" fill_in "Confirmation", with: "foobar" end it "should create a user" do expect do click_button "Create my account" end.to change(User, :count).by(1) end describe "after saving the user" do before { click_button "Create my account" } let(:user) { User.find_by_email('[email protected]') } it { should have_selector('title', text: user.name) } it { should have_selector('div.alert.alert-success', text: 'Welcome') } it { should have_link('Sign out') } end end end describe "signup page" do before { visit signup_path } it { should have_selector('h1', text: 'Sign up') } it { should have_selector('title', text: full_title('Sign up')) } end describe "signup" do before { visit signup_path } let(:submit) { "Create my account" } describe "with invalid information" do it "should not create a user" do expect { click_button submit }.not_to change(User, :count) end end describe "with valid information" do before do fill_in "Name", with: "Example User" fill_in "Email", with: "[email protected]" fill_in "Password", with: "foobar" fill_in "Confirmation", with: "foobar" end it "should create a user" do expect { click_button submit }.to change(User, :count).by(1) end describe "edit" do let(:user) { FactoryGirl.create(:user) } before { visit edit_user_path(user) } describe "page" do it { should have_selector('h1', text: "Update your profile") } it { should have_selector('title', text: "Edit user") } it { should have_link('change', href: 'http://gravatar.com/emails') } end describe "with invalid information" do before { click_button "Save changes" } it { should have_content('error') } end end end end end edit: users_controllers.rb was formatted incorrectly. It should look like this: class UsersController < ApplicationController def show @user = User.find(params[:id]) end def new @user = User.new end def create @user = User.new(params[:user]) if @user.save sign_in @user flash[:success] = "Welcome to the Sample App!" redirect_to @user else render 'new' end end def edit @user = User.find(params[:id]) end end

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