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  • iPhone User Interface Design

    - by Blaenk
    Hey guys, I've just had a nagging question for a while regarding iPhone app user interfaces. For example, consider WeightBot's User Interface. I am wondering, how are most of these user interfaces created? In general, of course. Is there a way to simply design controls (that is, the images) in a program like Photoshop, then use that 'skin' for controls in UIKit? I realize that there are some controls that are probably created by the programmer (custom controls), but I'm referring to the ready-made ones that come in UIKit. In other words, is the concept similar to 'splicing' web site designs? Where a designer draws out the design of the website in something like Photoshop, and then it is cut up into pieces which can be applied to form the actual website? I know this can be done for UIButtons, can this also be done for other controls, and is this how it is usually done? Or perhaps this is done with Core Animation? I've heard this from time to time, so does this mean that the User Interfaces are 'hard-coded'? Or is Core Animation only use for the 'effects', such as applying the glowing effect to the numbers in WeightBot? If there are any resources you can point me to I would really appreciate it. Thanks!

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  • How to not persist NSManagedObjects retrieved from NSManagedObjectContext

    - by RickiG
    Hi I parse an xml file containing books, for each new node I go: Book *book = (Book*)[NSEntityDescription insertNewObjectForEntityForName:@"Book" inManagedObjectContext:managedObjectContext]; To obtain an NSManagedObject of my Core Data Book Entity, I then proceed to populate the managed Book object with data, add it to an array, rinse, repeat. When I am done, I present the list of books to the user. I have not yet executed the save: NSError *error; if (![managedObjectContext save:&error]) { NSLog(@"%@", [error domain]); } The user now selects one of the books, this one I would like to persist, but only this one, all the other books are of no interest to me any more. The Book Entity does not have/or is part of any relationships. It is just a "single" Entity. If I pull the "save lever" every Book object will be persisted and I will have to delete everything but my desired one. How would I get around this challenge, I can't really seem to find that particular use-case in the Core Data Programming Guide, which sort of also bugs me a bit, am I going against best practice here? Thanks for any help given.

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  • NSPredicate case-insensitive matching on to-many relationship

    - by Brian Webster
    I am implementing a search field where the user can type in a string to filter the items displayed in a view. Each object being displayed has a keywords to-many relationship, and I would like to be able to filter the objects based on their keywords. Each keyword object has a name property, so I've set up an NSPredicate to do the filtering that looks like this: NSPredicate* predicate = [NSPredicate predicateWithFormat:@"keywords.name CONTAINS %@", self.searchString]; This works, but the problem is that the search is case-sensitive, so if the keyword has a capital letter but the user types in all lowercase, no matches are found. I've tried the following modification: NSPredicate* predicate = [NSPredicate predicateWithFormat:@"keywords.name CONTAINS[c] %@", self.searchString]; But that doesn't make any difference in the case sensitivity of the matching. Is there a way to do this case-insensitive matching using just a plain predicate? Or will I need to implement some sort of custom accessor on the keyword class, e.g. write a lowercaseName method and match against a lowercased version of the search string instead? Addendum: After further exploration, the workaround of adding a custom accessor works OK for manual use of NSPredicate, but does not work at all when using NSFetchRequest with Core Data, which only works when querying attributes defined in the Core Data model.

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  • How to animate the drawing of a CGPath?

    - by Jordan Kay
    I am wondering if there is a way to do this using Core Animation. Specifically, I am adding a sub-layer to a layer-backed custom NSView and setting its delegate to another custom NSView. That class's drawInRect method draws a single CGPath: - (void)drawInRect:(CGRect)rect inContext:(CGContextRef)context { CGContextSaveGState(context); CGContextSetLineWidth(context, 12); CGMutablePathRef path = CGPathCreateMutable(); CGPathMoveToPoint(path, NULL, 0, 0); CGPathAddLineToPoint(path, NULL, rect.size.width, rect.size.height); CGContextBeginPath(context); CGContextAddPath(context, path); CGContextStrokePath(context); CGContextRestoreGState(context); } My desired effect would be to animate the drawing of this line. That is, I'd like for the line to actually "stretch" in an animated way. It seems like there would be a simple way to do this using Core Animation, but I haven't been able to come across any. Do you have any suggestions as to how I could accomplish this goal?

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  • Sorting/Paginating/Filtering Complex Multi-AR Object Tables in Rails

    - by Matt Rogish
    I have a complex table pulled from a multi-ActiveRecord object array. This listing is a combined display of all of a particular user's "favorite" items (songs, messages, blog postings, whatever). Each of these items is a full-fledged AR object. My goal is to present the user with a simplified search, sort, and pagination interface. The user need not know that the Song has a singer, and that the Message has an author -- to the end user both entries in the table will be displayed as "User". Thus, the search box will simply be a dropdown list asking them which to search on (User name, created at, etc.). Internally, I would need to convert that to the appropriate object search, combine the results, and display. I can, separately, do pagination (mislav will_paginate), sorting, and filtering, but together I'm having some problems combining them. For example, if I paginate the combined list of items, the pagination plugin handles it just fine. It is not efficient since the pagination is happening in the app vs. the DB, but let's assume the intended use-case would indicate the vast majority of the users will have less than 30 favorited items and all other behavior, server capabilities, etc. indicates this will not be a bottleneck. However, if I wish to sort the list I cannot sort it via the pagination plugin because it relies on the assumption that the result set is derived from a single SQL query, and also that the field name is consistent throughout. Thus, I must sort the merged array via ruby, e.g. @items.sort_by{ |i| i.whatever } But, since the items do not share common names, I must first interrogate the object and then call the correct sort by. For example, if the user wishes to sort by user name, if the sorted object is a message, I sort by author but if the object is a song, I sort by singer. This is all very gross and feels quite un-ruby-like. This same problem comes into play with the filter. If the user filters on the "parent item" (the message's thread, the song's album), I must translate that to the appropriate collection object method. Also gross. This is not the exact set-up but is close enough. Note that this is a legacy app so changing it is quite difficult, although not impossible. Also, yes there is some DRY that can be done, but don't focus on the style or elegance of the following code. Style/elegance of the SOLUTION is important, however! :D models: class User < ActiveRecord::Base ... has_and_belongs_to_many :favorite_messages, :class_name => "Message" has_and_belongs_to_many :favorite_songs, :class_name => "Song" has_many :authored_messages, :class_name => "Message" has_many :sung_songs, :class_name => "Song" end class Message < ActiveRecord::Base has_and_belongs_to_many :favorite_messages belongs_to :author, :class_name => "User" belongs_to :thread end class Song < ActiveRecord::Base has_and_belongs_to_many :favorite_songs belongs_to :singer, :class_name => "User" belongs_to :album end controller: def show u = User.find 123 @items = Array.new @items << u.favorite_messages @items << u.favorite_songs # etc. etc. @items.flatten! @items = @items.sort_by{ |i| i.created_at } @items = @items.paginate :page => params[:page], :per_page => 20 end def search # Assume user is searching for username like 'Bob' u = User.find 123 @items = Array.new @items << u.favorite_messages.find( :all, :conditions => "LOWER( author ) LIKE LOWER('%bob%')" ) @items << u.favorite_songs.find( :all, :conditions => "LOWER( singer ) LIKE ... " ) # etc. etc. @items.flatten! @items = @items.sort_by{ |i| determine appropriate sorting based on user selection } @items = @items.paginate :page => params[:page], :per_page => 20 end view: #index.html.erb ... <table> <tr> <th>Title (sort ASC/DESC links)</th> <th>Created By (sort ASC/DESC links))</th> <th>Collection Title (sort ASC/DESC links)</th> <th>Created At (sort ASC/DESC links)</th> </tr> <% @items.each |item| do %> <%= render { :partial => "message", :locals => item } if item.is_a? Message %> <%= render { :partial => "song", :locals => item } if item.is_a? Song %> <%end%> ... </table> #message.html.erb # shorthand, not real ruby print out message title, author name, thread title, message created at #song.html.erb # shorthand print out song title, singer name, album title, song created at

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  • Adding data (not only text) to a multi column ListView (WPF)

    - by user811804
    I am working on a WPF application in C# (.NET 4.0) where I have a ListView with a GridView that has two columns. I dynamically want to add rows (in code). My dilemma is that only the first column will have regular text added to it. The second column will have an object that includes a multi column Grid with TextBlocks. (see link http://imageshack.us/photo/my-images/803/listview.png/) If I do what you would normally do when you want to enter text in all columns (ie. DisplayMemberBinding) all I get in the second column is the text "System.Windows.Grid", which obviously isn't what I want. For reference if I just try to add the Grid object (with the TextBlocks) with the code listView1.Items.Add(grid1) (not using DisplayMemberBinding) the object gets added to the second column only (with the first column being blank) and not how it normally works with text where the same text ends up in all columns. I hope my question is detailed enough and any help with this would be much appreciated. EDIT: I have tried the following code, howeever every time I click the button to add a new row every single row gets updated with the same datatemplate. (ie. the second column always shows the same data on every row.) xaml: <Window x:Class="TEST.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Name="AAA" Title="MainWindow" Height="350" Width="525" Loaded="Window_Loaded"> <Grid Name="grid1"> <Grid.ColumnDefinitions> <ColumnDefinition Width="374*" /> <ColumnDefinition Width="129*" /> </Grid.ColumnDefinitions> <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="21,12,0,0" Name="button1" VerticalAlignment="Top" Width="75" Grid.Column="1" Click="button1_Click" /> </Grid> code: public partial class MainWindow : Window { ListView listView1 = new ListView(); GridViewColumn viewCol2 = new GridViewColumn(); public MainWindow() { InitializeComponent(); Style style = new Style(typeof(ListViewItem)); style.Setters.Add(new Setter(ListViewItem.HorizontalContentAlignmentProperty, HorizontalAlignment.Stretch)); listView1.ItemContainerStyle = style; GridView gridView1 = new GridView(); listView1.View = gridView1; GridViewColumn viewCol1 = new GridViewColumn(); viewCol1.Header = "Option"; gridView1.Columns.Add(viewCol1); viewCol2.Header = "Value"; gridView1.Columns.Add(viewCol2); grid1.Children.Add(listView1); viewCol1.DisplayMemberBinding = new Binding("Option"); } private void Window_Loaded(object sender, RoutedEventArgs e) { } private void button1_Click(object sender, RoutedEventArgs e) { DataTemplate dataTemplate = new DataTemplate(); FrameworkElementFactory spFactory = new FrameworkElementFactory(typeof(Grid)); Random random = new Random(); int cols = random.Next(1, 6); int full = 100; for (int i = 0; i < cols; i++) { FrameworkElementFactory col1 = new FrameworkElementFactory(typeof(ColumnDefinition)); int partWidth = random.Next(0, full); full -= partWidth; col1.SetValue(ColumnDefinition.WidthProperty, new GridLength(partWidth, GridUnitType.Star)); spFactory.AppendChild(col1); } if (full > 0) { FrameworkElementFactory col1 = new FrameworkElementFactory(typeof(ColumnDefinition)); col1.SetValue(ColumnDefinition.WidthProperty, new GridLength(full, GridUnitType.Star)); spFactory.AppendChild(col1); } for (int i = 0; i < cols; i++) { FrameworkElementFactory text1 = new FrameworkElementFactory(typeof(TextBlock)); SolidColorBrush sb1 = new SolidColorBrush(); switch (i) { case 0: sb1.Color = Colors.Blue; break; case 1: sb1.Color = Colors.Red; break; case 2: sb1.Color = Colors.Yellow; break; case 3: sb1.Color = Colors.Green; break; case 4: sb1.Color = Colors.Purple; break; case 5: sb1.Color = Colors.Pink; break; case 6: sb1.Color = Colors.Brown; break; } text1.SetValue(TextBlock.BackgroundProperty, sb1); text1.SetValue(Grid.ColumnProperty, i); spFactory.AppendChild(text1); } if (full > 0) { FrameworkElementFactory text1 = new FrameworkElementFactory(typeof(TextBlock)); SolidColorBrush sb1 = new SolidColorBrush(Colors.Black); text1.SetValue(TextBlock.BackgroundProperty, sb1); text1.SetValue(Grid.ColumnProperty, cols); spFactory.AppendChild(text1); } dataTemplate.VisualTree = spFactory; viewCol2.CellTemplate = dataTemplate; int rows = listView1.Items.Count + 1; listView1.Items.Add(new { Option = "Row " + rows }); } }

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  • What do you need to implement to provide a Content Set for an NSArrayController?

    - by whuuh
    Heys, I am writing something in Xcode. I use Core Data for persistency and link the view and the model together with Cocoa Bindings; pretty much your ordinary Core Data application. I have an array controller (NSArrayController) in my Xib. This has its managedObjectContext bound to the AppDelegate, as is convention, and tracks an entity. So far so good. Now, the "Content Set" biding of this NSArrayController limits its content set (as you'd expect), by a keyPath from the selection in another NSArrayController (otherAc.selection.detailsOfMaster). This is the usual way to implement a Master-Detail relationship. I want to variably change the key path at runtime, using other controls. This way, I sould return a content set that includes several other content sets, which is all advanced and beyond Interface Builder. To achieve this, I think I should bind the Content Set to my AppDelegate instead. I have tried to do this, but don't know what methods to implement. If I just create the KVC methods (objectSet, setObjectSet), then I can provide a Content Set for the Array Controller in the contentSet method. However, I don't think I'm binding this properly, because it doesn't "refresh". I'm new to binding; what do I need to implement to properly update the Content Set when other things, like the selection in the master NSArrayController, changes?

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  • Archiver Securing SQLite Data without using Encryption on iPhone

    - by Redrocks
    I'm developing an iphone app that uses Core Data with a SQLite data store and lots of images in the resource bundle. I want a "simple" way to obfuscate the file structure of the SQLite database and the image files to prevent the casual hacker/unscrupulous developer from gaining access to them. When the app is deployed, the database file and image files would be obfuscated. Upon launching the app it would read in and un-obfuscate the database file, write the un-obfuscated version to the users "tmp" directory for use by core data, and read/un-obfuscate image files as needed. I'd like to apply a simple algorithm to the files that would somehow scramble/manipulate the file data so that the sqlite database data isn't discernible when the db is opened in a text editor and so that neither is recognized by other applications (SQLite Manager, Photoshop, etc.) It seems, from the information I've read, that I could use NSFileManager, NSKeyedArchiver, and NSData to accomplish this but I'm not sure how to proceed. Been developing software for many years but I'm new to everything CocoaTouch, Mac and iPhone. Also never had to secure/encrypt my data so this is new. Any thoughts, suggestions, or links to solutions are appreciated.

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  • PROBLEM: PHP strip_tags & multi-dimensional array form parameter

    - by Tunji Gbadamosi
    I'm having problems stripping the tags from the textual inputs retrieved from my form so as to do something with them in checkout.php. The input is stored in a multi-dimensional array. Here's my form: echo '<form name="choose" action="checkout.php" method="post" onsubmit="return validate_second_form(this);">'; echo '<input type="hidden" name="hidden_value" value="'.$no_guests.'" />'; if($no_guests >= 1){ echo '<div class="volunteer">'; echo '<fieldset>'; echo '<legend>Volunteer:</legend>'; echo '<label>Table:</label>'; echo '<select name="volunteer_table">'; foreach($tables as $t){ echo '<option>'.$t.'</option>'; } echo '</select><br><br>'; echo '<label>Seat number:</label>'; echo '<select name="volunteer_seat">'; foreach($seats as $seat){ echo '<option>'.$seat.'</option>'; } echo '</select><br><br>'; //echo '<br>'; echo '</fieldset>'; echo '</div>'; for($i=0;$i<$no_guests;$i++){ $guest = "guest_".$i; echo '<div class="'.$guest.'">'; echo '<fieldset>'; echo '<legend>Guest '.$i.':</legend>'; echo '<label>First Name:</label>'; echo '<input type="text" name="guest['.$i.']['.$first_name.']" id="fn'.$i.'">'; echo '<label>Surname:</label>'; echo '<input type="text" name="guest['.$i.']['.$surname.']" id="surname'.$i.'"><br><br>'; echo '<label>Date of Birth:</label> <br>'; echo '<label>Day:</label>'; echo '<select name="guest['.$i.'][dob_day]">'; for($j=1;$j<32;$j++){ echo"<option value='$j'>$j</option>"; } echo '</select>'; echo '<label>Month:</label>'; echo '<select name="guest['.$i.'][dob_month]">'; for($j=0;$j<sizeof($month);$j++){ $value = ($j + 1); echo"<option value='$value'>$month[$j]</option>"; } echo '</select>'; echo '<label>Year:</label>'; echo '<select name="guest['.$i.'][dob_year]">'; for($j=1900;$j<$year_limit;$j++){ echo"<option value='$j'>$j</option>"; } echo '</select> <br><br>'; echo '<label>Sex:</label>'; echo '<select name="guest['.$i.']['.$sex.']">'; echo '<option>Female</option>'; echo '<option>Male</option>'; echo '</select><br><br>'; echo '<label>Table:</label>'; echo '<select name="guest['.$i.']['.$table.']">'; foreach($tables as $t){ echo '<option>'.$t.'</option>'; } echo '</select><br><br>'; echo '<label>Seat number:</label>'; echo '<select name="guest['.$i.']['.$seat_no.']">'; foreach($seats as $seat){ echo '<option>'.$seat.'</option>'; } echo '</select><br><br>'; //echo '<br>'; echo '</fieldset>'; echo '</div>'; } } else{ echo '<div id="volunteer">'; echo '<fieldset>'; echo '<legend>Volunteer:</legend>'; echo '<label>Table:</label>'; echo '<select name="volunteer['.$table.']">'; foreach($tables as $t){ echo '<option>'.$t.'</option>'; } echo '</select><br><br>'; echo '<label>Seat number:</label>'; echo '<select name="volunteer['.$seat_no.']">'; foreach($seats as $seat){ echo '<option>'.$seat.'</option>'; } echo '</select><br><br>'; //echo '<br>'; echo '</fieldset>'; echo '</div>'; } echo '<input type="submit" value="Submit form">'; echo '</form>'; here's checkout.php: if(isset($_POST['guest'])){ foreach($_POST['guest'] as $guest){ $guest['first_name'] = strip_tags($guest['first_name']); $guest['surname'] = strip_tags($guest['surname']); } //$_SESSION['guest'] = $guests; }

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  • iphone coredata fetch-request sorting

    - by satyam
    I'm using core data and fetching the results successfully. I've few questions regarding core data 1. When I add a record, will it be added at the end or at the start of entity. 2. I'm using following code to fetch the data. Array is being populated with all the records. But they are not in the same order as I entered records into entity. why? on what basis default sorting is used? NSFetchRequest* allLatest = [[NSFetchRequest alloc] init]; [allLatest setEntity:[NSEntityDescription entityForName:@"Latest" inManagedObjectContext:[self managedObjectContext]]]; NSError* error = nil; NSArray* records = [managedObjectContext executeFetchRequest:allLatest error:&error]; [allLatest release]; 3. The way that I enter the records, 1,2,3,4......... after some time, I want to delete the records that I entered first(i mean oldest data). Something like delete oldest two records. How to do it?

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  • A elusive multi level accordion

    - by juanpablo
    Hi, I try make a multi level accordion with jquery: <div class="acordion"> <a href="#"><h1>aaa</h1></a> <div class="acoTitulo"> <h1>aaa</h1> <div class="acoSubTitulo"> <a href="#"><h2>bbb</h2></a> <div class="acoSubSubTitulo"> <h2>bbb</h2> <div class="acoLink"> <a href="#">ccc</a><br> <a href="#">ccc</a> </div> </div> </div> <!-- acoSubTitulo --> </div> <!-- end acoTitulo --> <div class="acoTitulo"> <h1>aaa</h1> <div class="acoSubTitulo"> <a href="#"><h2>bbb</h2></a> <div class="acoSubSubTitulo"> <h2>bbb</h2> <div class="acoLink"> <a href="#">ccc</a><br> <a href="#">ccc</a> </div> </div> </div> <!-- acoSubTitulo --> </div> <!-- end acoTitulo --> <div class="acoTitulo"> <h1>aaa</h1> <div class="acoSubTitulo"> <a href="#"><h2>bbb</h2></a> <a href="#"><h2>bbb</h2></a> </div> <!-- acoSubTitulo --> </div> <!-- end acoTitulo --> <a href="#"><h1>aaa</h1></a> <a href="#"><h1>aaa</h1></a> <div class="acoTitulo"> <h1>aaa</h1> <div class="acoSubTitulo"> <a href="#"><h2>bbb</h2></a> <a href="#"><h2>bbb</h2></a> </div> <!-- acoSubTitulo --> </div> <!-- end acoTitulo --> <div class="acoTitulo"> <h1>aaa</h1> <div class="acoSubTitulo"> <a href="#"><h2>bbb</h2></a> <a href="#"><h2>bbb</h2></a> </div> <!-- acoSubTitulo --> </div> <!-- end acoTitulo --> </div> <!-- end acordion --> .acordion h1, .acordion h2, .acoLink { font-size: 11px; padding: 8px; } .acoTitulo h2 { margin: 0px; } .acordion * a, .acordion a { text-decoration:none; color: #fff; } .acordion { width: 160px; color: #fff; background-color: #06f; border: 1px solid #06f; } .acoSubTitulo { background-color: #09f; } $(document).ready(function(){ $(".acoSubTitulo").hide(); $(".acoLink").hide(); $(".acoTitulo").hover( function(){ $(this).find(".acoSubTitulo").slideToggle("slow"); },function(){ $(this).find(".acoSubTitulo").slideToggle("slow"); } ); $(".acoSubSubTitulo").hover( function(){ $(this).find(".acoLink").slideToggle(); },function(){ $(this).find(".acoLink").slideToggle(); } ); }); but, this accordion is very elusive with the mouse. any idea? many thanks.

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  • Moving UITableView cells and maintaining consistent data

    - by Mark F
    I've enabled editing mode and moving cells around to allow users to position table view content in the order they please. I'm using Core Data as the data source, which sorts the content by the attribute "userOrder". When content is first inserted, userOrder is set to a random value. The idea is that when the user moves a cell around, the userOrder of that cell changes to accomodate its new position. The following are problems I am running into while trying to accomplish this: Successfully saving the the new location of the cell and adjusting all changed locations of influenced cells. Getting the data to be consistent. For example, the TableView handles the movement fine, but when i click on the new location of the cell, it displays data for the old cell that used to be that location. Data of all influenced cells gets messed up as well. I know I have to implement this in: - (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath {} I just don't know how. The apple docs are not particularly helpful if you are using Core Data, as in my situation. Any guidance greatly appreciated!

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  • Detailstext in TableView from Coredata Iphone

    - by user554867
    Hey, that is my first question here at stackoverflow. Let me try to be specific as I can. The project is as follows: I am trying to parse an xml file in an iphone app, which works already. I am saving the parsed data into the CoreData of the Iphone. So far so good: I have two elements of the xml file which I want to show in the tableview as the text and the detailtext. Now the strange behaviour occurs: If I take the data of the Core Data and trying to visualize them in the tableview, then both elements are displayed in seperate cells and not as detailtext of the element. If I am just taking a constant string for the detailtext, then it works, but if I am trying to take for every cell a specific element from the Core Data then it is shown seperately in the tableview. I googled a lot, reading here and there. I dont know which code I should show because I dont have a clue where exactly the mistake could be. Maybe someone can answer that immediately because it is a stupid mistake somewhere, which is common. Thanks for your help.

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  • What type of data store should I use for my ios app?

    - by mwiederrecht
    I am pretty new to ios and using servers so forgive me. I am building an ios app for research. I need to monitor things that the user does and then push it up to a server for analysis (yes, with user and IRB permission). On the client's side I need to keep quite a bit of data that won't really change except in the case of pulling an updated version from the server, and then a minimal amount of user-specific data. Most of the data I will collect needs to be pushed to a server for analysis and then can be deleted from the client side. I am struggling to figure out what kind of data store I need to use, especially since I am not quite sure how the pushing and pulling from the server process works yet. Does it make sense to use Core Data? XML? SQLite? I like the Core Data idea, but I am not sure what kind of problems I will run into when I need to send large amounts of data to it and from it from the server. I imagine I might need to send data in a different form than it is probably stored in on either end - so what kind of overhead am I likely to run into in the process of converting that data? Is there a good format to save stuff in that would work well for me on both ends AND for sending the data? As you can probably tell, I could use some advice. Thanks!

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  • Multi-threading does not work correctly using std::thread (C++ 11)

    - by user1364743
    I coded a small c++ program to try to understand how multi-threading works using std::thread. Here's the step of my program execution : Initialization of a 5x5 matrix of integers with a unique value '42' contained in the class 'Toto' (initialized in the main). I print the initialized 5x5 matrix. Declaration of std::vector of 5 threads. I attach all threads respectively with their task (threadTask method). Each thread will manipulate a std::vector<int> instance. I join all threads. I print the new state of my 5x5 matrix. Here's the output : 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 It should be : 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 0 0 0 0 0 1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4 Here's the code sample : #include <iostream> #include <vector> #include <thread> class Toto { public: /* ** Initialize a 5x5 matrix with the 42 value. */ void initData(void) { for (int y = 0; y < 5; y++) { std::vector<int> vec; for (int x = 0; x < 5; x++) { vec.push_back(42); } this->m_data.push_back(vec); } } /* ** Display the whole matrix. */ void printData(void) const { for (int y = 0; y < 5; y++) { for (int x = 0; x < 5; x++) { printf("%d ", this->m_data[y][x]); } printf("\n"); } printf("\n"); } /* ** Function attached to the thread (thread task). ** Replace the original '42' value by another one. */ void threadTask(std::vector<int> &list, int value) { for (int x = 0; x < 5; x++) { list[x] = value; } } /* ** Return the m_data instance propertie. */ std::vector<std::vector<int> > &getData(void) { return (this->m_data); } private: std::vector<std::vector<int> > m_data; }; int main(void) { Toto toto; toto.initData(); toto.printData(); //Display the original 5x5 matrix (first display). std::vector<std::thread> threadList(5); //Initialization of vector of 5 threads. for (int i = 0; i < 5; i++) { //Threads initializationss std::vector<int> vec = toto.getData()[i]; //Get each sub-vectors. threadList.at(i) = std::thread(&Toto::threadTask, toto, vec, i); //Each thread will be attached to a specific vector. } for (int j = 0; j < 5; j++) { threadList.at(j).join(); } toto.printData(); //Second display. getchar(); return (0); } However, in the method threadTask, if I print the variable list[x], the output is correct. I think I can't print the correct data in the main because the printData() call is in the main thread and the display in the threadTask function is correct because the method is executed in its own thread (not the main one). It's strange, it means that all threads created in a parent processes can't modified the data in this parent processes ? I think I forget something in my code. I'm really lost. Does anyone can help me, please ? Thank a lot in advance for your help.

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  • Cmdlets for AD CS deployment: Install-ADcsCertificationAuthority cmdlet failing when attempting to install an offline policy CA

    - by red888
    I installed an offline root CA without issue using this command: Install-ADcsCertificationAuthority ` -OverwriteExistingKey ` <#In the case of a re-installation#> ` -AllowAdministratorInteraction ` -CACommonName ` "LAB Corporate Root CA" ` -CADistinguishedNameSuffix ` 'O=LAB Inc.,C=US' ` -CAType ` StandaloneRootCA ` -CryptoProviderName ` "RSA#Microsoft Software Key Storage Provider" ` -HashAlgorithmName ` SHA256 ` -KeyLength ` 2048 ` -ValidityPeriod ` Years ` -ValidityPeriodUnits ` 20 ` -DatabaseDirectory ` 'E:\CAData\CertDB' ` -LogDirectory ` 'E:\CAData\CertLog' ` -Verbose I installed the root CA's cert and CRl on the policy CA, installed the AD CS binaries, and attempted to run this command to install the policy CA and export a req file: Install-ADcsCertificationAuthority ` -OverwriteExistingKey ` <#In the case of a re-installation#> ` -AllowAdministratorInteraction ` -CACommonName ` "LAB Corporate Policy Internal CA" ` -CADistinguishedNameSuffix ` 'O=LAB Inc.,C=US' ` -CAType ` StandaloneSubordinateCA ` -ParentCA ` rootca ` -OutputCertRequestFile ` 'e:\polca-int.req' ` -CryptoProviderName ` "RSA#Microsoft Software Key Storage Provider" ` -HashAlgorithmName ` SHA256 ` -KeyLength ` 2048 ` -ValidityPeriod ` Years ` -ValidityPeriodUnits ` 10 ` -DatabaseDirectory ` 'E:\CAData\CertDB' ` -LogDirectory ` 'E:\CAData\CertLog' ` -Verbose When doing this I receive the following error: VERBOSE: Calling InitializeDefaults method on the setup object. Install-ADcsCertificationAuthority : At line:1 char:1 + Install-ADcsCertificationAuthority ` + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidArgument: (:) [Install-AdcsCertificationA uthority], CertificationAuthoritySetupException + FullyQualifiedErrorId : ValidateParameters,Microsoft.CertificateServices .Deployment.Commands.CA.InstallADCSCertificationAuthority Is there a parameter I am entering incorrectly or something?

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  • Can I use LGA775 heatsink on LGA1156 CPU?

    - by Ghostrider
    Will cooler that is designed to LGA775 CPUs install on LGA1156 CPU or are they mechanically incompatible? I'm building my first 1U server and surprise-surprise - Intel stock cooler doesn't fit (unless I'm willing to keep the case open). Places that I prefer to buy stuff from are currently out of stock on 1U 1156 heatsinks so I'm wondering if LGA775 would do the trick.

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  • Unlocking AMD Phenom II X2 550 Black Edition cores - what are the risks?

    - by Vilx-
    I've got the above mentioned CPU and a GigaByte GA-MA790XT-UD4P motherboard, which should be capable of unlocking the extra two cores - if I'm lucky and they're not faulty. The Internet is full of instructions on how to do that. What I don't have is spare money to buy new hardware if I brick something. What are the risks when attempting to do this? Is it completely safe, or can I be left with an expensive pile of junk? What should I keep in mind when doing so? Bigger cooler maybe (I'm running with the default box cooler)? Should I lower the frequencies too? I've never done any OC before.

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  • Forgot the username

    - by prithviraj
    Hello all I have fedora installed in my system. I know the password but i forgot the user name. I can access through terminal but i don't no how to login through gui. Please help me. Thanks in advance.

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  • Processor Upgrade HP Elite M9510F

    - by DaveM
    I have an HP 9510F that uses the ASUS IPIBL-LB MB. It ships with an Intel Q8200 Quad Core processor but it does not support virtualization. Specs for the board from HP (ASUS does not list this OEM board) do not show support for the Intel Q8200 it ships with (obviously incorrect) but only these • Supports the following processors: o Intel Core 2 Quad (Yorkfield core) Q9xxx o Intel Core 2 Duo (Wolfsdale core) E8xxx o Intel Core 2 Quad (Kentsfield core) up to Q6600 o Core 2 Duo E6x00 (Conroe core) up to E6700 o Core 2 Duo E4x00 (Conroe core) up to E4400 Can this MB support the Q8400 or will it only support the indicated Q9xxx series? Naturally HP is little help here. Specs are located hereHP/ASUS MB specs

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  • ffmpeg not using all cores

    - by user2783132
    I just got my new server with two intel e5-2695 but I was shocked to see that ffmpeg or ubuntu doesn't utilize all cores. top while ffmpeg was running top - 23:35:25 up 2:41, 2 users, load average: 5.35, 4.37, 3.12 Tasks: 333 total, 2 running, 331 sleeping, 0 stopped, 0 zombie %Cpu0 : 0.0 us, 1.0 sy, 35.6 ni, 63.4 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu1 : 0.0 us, 0.7 sy, 35.5 ni, 63.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu2 : 0.0 us, 0.7 sy, 33.4 ni, 65.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu3 : 0.0 us, 0.0 sy, 32.7 ni, 67.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu4 : 0.0 us, 0.3 sy, 32.3 ni, 67.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu5 : 0.0 us, 0.3 sy, 33.0 ni, 66.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu6 : 0.0 us, 0.0 sy, 32.6 ni, 67.4 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu7 : 0.0 us, 0.3 sy, 32.7 ni, 67.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu8 : 0.0 us, 0.7 sy, 32.6 ni, 66.8 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu9 : 0.0 us, 0.3 sy, 33.9 ni, 65.8 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu10 : 0.0 us, 0.0 sy, 35.0 ni, 65.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu11 : 0.0 us, 0.7 sy, 30.0 ni, 69.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu12 : 21.1 us, 0.0 sy, 0.0 ni, 78.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu13 : 0.7 us, 0.0 sy, 4.3 ni, 95.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu14 : 0.3 us, 0.0 sy, 5.0 ni, 94.6 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu15 : 24.9 us, 0.0 sy, 0.0 ni, 75.1 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu16 : 0.3 us, 0.0 sy, 3.7 ni, 96.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu17 : 0.7 us, 0.3 sy, 4.9 ni, 94.1 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu18 : 1.0 us, 0.0 sy, 4.6 ni, 94.4 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu19 : 0.7 us, 0.0 sy, 4.7 ni, 94.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu20 : 11.1 us, 0.0 sy, 0.0 ni, 88.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu21 : 1.3 us, 0.0 sy, 4.6 ni, 94.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu22 : 2.0 us, 0.3 sy, 4.3 ni, 93.4 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu23 : 96.7 us, 1.0 sy, 0.0 ni, 2.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu24 : 0.0 us, 0.0 sy, 0.7 ni, 99.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu25 : 0.0 us, 0.0 sy, 3.0 ni, 97.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu26 : 0.0 us, 0.0 sy, 1.3 ni, 98.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu27 : 0.0 us, 0.0 sy, 4.0 ni, 96.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu28 : 0.0 us, 0.0 sy, 1.7 ni, 98.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu29 : 0.0 us, 0.0 sy, 1.7 ni, 98.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu30 : 0.0 us, 0.0 sy, 1.7 ni, 98.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu31 : 0.0 us, 0.0 sy, 1.0 ni, 99.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu32 : 0.0 us, 0.0 sy, 0.7 ni, 99.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu33 : 0.0 us, 0.0 sy, 1.7 ni, 98.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu34 : 0.0 us, 0.0 sy, 2.0 ni, 98.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu35 : 0.0 us, 0.0 sy, 1.0 ni, 99.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st %Cpu36 : 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st ffmpeg was sent with -threads 0 *I also tried sending ffmoeg with -threads 500- no difference

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  • Need Windows XP VGA driver for i3 Haswell

    - by AFH
    Background: I have recently upgraded my hardware because the previous Pentium system started failing to the point that it would not run long enough to boot. It was obviously a hardware fault, but I had no way of knowing whether it was in the motherboard, CPU or memory. Not all the components were now available, so I decided to replace all three. In order to get some benefit from the expenditure, I though I would put in faster components, and for future-proofing went for recently released ones: MSI Z87-G41-PCMate and Intel i3-4130 with 4400 HD graphics. The system performs excellently with Ubuntu 13.10, so I know there are no hardware problems, but I need to continue running XP because it runs several thousand pounds (UK) worth of software, which meets my needs more than adequately: in some cases there is no longer support for later Windows releases, and in most others an expensive and to me unnecessary upgrade is required. Problem: The motherboard specifications claim Windows XP support for the live driver update utility, which misled me into believing that XP drivers were available. Not true: Intel have apparently refused to provide XP drivers for Haswell chips. The update program runs on XP, but finds no suitable Intel drivers. The system is more or less running on the default fail-safe VGA driver, but DirectX will not load, which stops a number of my applications from running. I have been trawling the internet for a month now, but I have not found a graphics driver which will load successfully: all show "This device cannot start. (code 10)". I don't need HDMI support: my monitor is 1280x1024 and connected through the VGA port, so all I need is a driver which will handle this resolution well enough to support DirectX. Has anyone found a driver which will do this? Please don't reply with information found from internet searches, unless you have actually solved this problem: be assured that I have been all round the houses looking at solutions which others have reported as working, but none of them does for me. Incidentally, I did find an Intel HD sound driver which XP accepts (winxp_145111.exe from Intel), though without connecting to an HDMI port on a TV or sound system I have no idea if it works in practice. However, the graphics section of the same driver fails, like all the others I've tried.

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  • AMD switchable graphics are not working OR I don't know how to make them work

    - by Deus Deceit
    I don't know if this is the right place for this question, but I'll give it a shot. I have a Dell Inspiron 17R 5721. It's supposed to be using switchable graphics. It has an Intel HD 4000 and a Radeon HD 8730M and I'm using windows 8. My problem is this, I Installed the drivers that dell gives me but I don't see the AMD graphics card ANYWHERE ( I do see it in device manager but not anywhere else to select and play a game using AMD). I installed the latest drivers from AMD and same thing, I can't run a game with AMD graphics card. I change the applications preferences in the Catalyst control center but even after that, games don't give me the option to select the AMD card, they list only the Intel HD 4000. Can someone tell me what I have to do to make this work? ------------------- After looking around and messing with stuff. I think.... I THINK that you don't really get the option to select a graphics card. Switchable graphics is all about switching automatically depending on application's needs. Cause when I uninstalled AMD's drivers or actually (screwed up lol) games were playing much worse. When I re-installed them, games went back to being good looking. So even if a game sees only the Intel HD 4000 graphics card windows or AMD's drivers will switch to the AMD Readeon graphics card automatically. I hope someone can verify this. Cause seriously I don't think you get to play scyrim with High graphics settings or even ultra with the Intel HD Graphics card. -------------------

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