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  • Vector iterators in for loops, return statements, warning, c++

    - by Crystal
    Had 3 questions regarding a hw assignment for C++. The goal was to create a simple palindrome method. Here is my template for that: #ifndef PALINDROME_H #define PALINDROME_H #include <vector> #include <iostream> #include <cmath> template <class T> static bool palindrome(const std::vector<T> &input) { std::vector<T>::const_iterator it = input.begin(); std::vector<T>::const_reverse_iterator rit = input.rbegin(); for (int i = 0; i < input.size()/2; i++, it++, rit++) { if (!(*it == *rit)) { return false; } } return true; } template <class T> static void showVector(const std::vector<T> &input) { for (std::vector<T>::const_iterator it = input.begin(); it != input.end(); it++) { std::cout << *it << " "; } } #endif Regarding the above code, can you have more than one iterator declared in the first part of the for loop? I tried defining both the "it" and "rit" in the palindrome() method, and I kept on getting an error about needing a "," before rit. But when I cut and paste outside the for loop, no errors from the compiler. (I'm using VS 2008). Second question, I pretty much just brain farted on this one. But is the way I have my return statements in the palindrome() method ok? In my head, I think it works like, once the *it and *rit do not equal each other, then the function returns false, and the method exits at this point. Otherwise if it goes all the way through the for loop, then it returns true at the end. I totally brain farted on how return statements work in if blocks and I tried looking up a good example in my book and I couldn't find one. Finally, I get this warnings: \palindrome.h(14) : warning C4018: '<' : signed/unsigned mismatch Now is that because I run my for loop until (i < input.size()/2) and the compiler is telling me that input can be negative? Thanks!

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  • Boost any usage

    - by Ockonal
    Hello, how can I insert my own class objects into ptr_map from boost. The objects are templated so I can't use some static typename in the map. So I did: ptr_map<string, any> someMap; My class inherits the boost::noncopyable. someMap.insert("Test", new MyClass()); The error is: error: no matching function for call to ‘boost::ptr_map.

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  • How to refresh xmlDataProvider when xml document changes at runtime in WPF?

    - by Kajsa
    I am trying to make a image viewer/album creator in visual studio, wpf. The image paths for each album is stored in an xml document which i bind to to show the images from each album in a listbox. The problem is when i add a image or an album at runtime and write it to the xml document. I can't seem to make the bindings to the xml document update so they show the new images and albums aswell. Calling Refresh() on the XmlDataProvider doesn't change anything. I don't wish to redo the binding of the XmlDataProvider, just make it read from the same source again. XAML: ... <Grid.DataContext> <XmlDataProvider x:Name="Images" Source="Data/images.xml" XPath="/albums/album[@name='no album']/image" /> </Grid.DataContext> ... <Label Grid.Row="1" Grid.Column="0" HorizontalAlignment="Right" VerticalAlignment="Bottom" Padding="0" Margin="0,0,0,5" Content="{x:Static resx:Resource.AddImageLabel}"/> <TextBox Grid.Row="1" Grid.Column="1" HorizontalAlignment="Stretch" VerticalAlignment="Bottom" Name="newImagePath" Margin="0" /> <Button Grid.Row="1" Grid.Column="2" HorizontalAlignment="Left" VerticalAlignment="Bottom" Name="newImagePathButton" Content="{x:Static resx:Resource.BrowseImageButton}" Click="newImagePathButton_Click" /> ... <ListBox Grid.Column="0" Grid.ColumnSpan="4" Grid.Row="3" HorizontalAlignment="Stretch" Name="thumbnailList" VerticalAlignment="Bottom" IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding BindingGroupName=Images}" SelectedIndex="0" Background="#FFE0E0E0" Height="110"> ... Code behind: private void newImagePathButton_Click(object sender, RoutedEventArgs e) { string imagePath = newImagePath.Text; albumCreator.addImage(imagePath, null); //Reset import image elements to default newImagePath.Text = ""; //Refresh thumbnail listbox Images.Refresh(); Console.WriteLine("Image added!"); } public void addImage(string source, XmlElement parent) { if (parent == null) { //Use default album parent = (XmlElement)root.FirstChild; } //Create image element with source element within XmlElement newImage = xmlDoc.CreateElement(null, "image", null); XmlElement newSource = xmlDoc.CreateElement(null, "source", null); newSource.InnerText = source; newImage.AppendChild(newSource); //Add image element to parent parent.AppendChild(newImage); xmlDoc.Save(xmlFile); } Thank you very much for any help!

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  • How to pass int values to asp.net page methods from jquery?

    - by Pandiya Chendur
    I am using asp.net page methods with jquery..... Here is my code, $.ajax({ type: "POST", url: "Default.aspx/GetRecords", data: "{}", contentType: "application/json; charset=utf-8", dataType: "json", and asp.net page method is, [WebMethod] public static string GetRecords(int currentPage,int pagesize) { // my logic here } How to pass values for currentPage and pagesize from jquery....

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  • Sharing DefaultHttpClient in Android. To synchronize or not to synchronize?

    - by johnrock
    In an Android app, I am using one static instance of org.apache.http.impl.client.DefaultHttpClient and sharing that instance in all activities and services of the app, so that this client may be used to log in once to a remote server and all subsequent user requests to that remote server will remain authenticated. Every activity or Service that makes a GET or POST to this remote server calls the same method : MyUtilityClass.gettHttpClient() Do I need to worry about synchronization of this httpclient? If so, what is the best way to handle this?

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  • Saving an xml file without

    - by little
    Hi, How do I work with an xml file that when updating it, after saving the commented lines would still be present. Here's my code snippet for saving the file: public static void WriteSettings(Settings settings, string path) { XmlSerializer serializer = new XmlSerializer(typeof(Settings)); TextWriter writer = new StreamWriter(path); serializer.Serialize(writer, settings); writer.Close(); }

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  • Critiquing PHP-code / PerlCritic for PHP?

    - by jeekl
    I'm looking for an equivalent of PerlCritic for PHP. PerlCritc is a static source code analyzer that qritiques code and warns about everything from unused variables, to unsafe ways to handle data to almost anything. Is there such a thing for PHP that could (preferably) be run outside of an IDE, so that source code analysis could be automated?

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  • Is it possible to do DNS-based ACLs on a Cisco ASA?

    - by pickles
    Short of using static IP addresses, is it possible to have a Cisco ASA use a DNS name rather than an IP address? For instance, if I want to limit a host in the DMZ to access only one particular web service, but that web service might be globally load balanced or using DynDNS or cloud, how can the ACL be expressed so that a fixed IP address isn't used and the admin doesn't have to keep opening and closing down IP addresses?

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  • Gridview Datasource Server error

    - by salvationishere
    I am developing a C# VS 2008 and SQL Server 2008 website. However, I get the below error now when I first run this: The DataSourceID of 'GridView1' must be the ID of a control of type IDataSource. A control with ID 'AdventureWorks3.mdf' could not be found What is causing this error? Here is my default.aspx file. I have configured GridView1 to use my AdventureWorks3.mdf file, stored in my App_Data folder. Do I need to add this folder name to this ASPX file? <%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Title="Untitled Page" %> <asp:Content ID="Content1" ContentPlaceHolderID="MainContent" Runat="Server"> <asp:Panel runat="server" ID="AuthenticatedMessagePanel"> <asp:Label runat="server" ID="WelcomeBackMessage"></asp:Label> <table> <tr > <td> <asp:Label ID="tableLabel" runat="server" Font-Bold="True" Text="Select target table:"></asp:Label> </td> <td> <asp:Label ID="inputLabel" runat="server" Font-Bold="True" Text="Select input file:"></asp:Label> </td></tr> <tr><td valign="top"> <asp:Label ID="feedbackLabel" runat="server"></asp:Label> <asp:GridView ID="GridView1" runat="server" style="WIDTH: 400px;" CellPadding="4" ForeColor="#333333" GridLines="None" onselectedindexchanged="GridView1_SelectedIndexChanged" AutoGenerateSelectButton="True" DataSourceID="AdventureWorks3.mdf" > <RowStyle BackColor="#F7F6F3" ForeColor="#333333" /> <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /> <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" /> <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" /> <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /> <EditRowStyle BackColor="#999999" /> <AlternatingRowStyle BackColor="White" ForeColor="#284775" /> </asp:GridView> </td> <td valign="top"> <input id="uploadFile" type="file" size="26" runat="server" name="uploadFile" title="UploadFile" class="greybar" enableviewstate="True" /> </td></tr> </table> </asp:Panel> <asp:Panel runat="Server" ID="AnonymousMessagePanel"> <asp:HyperLink runat="server" ID="lnkLogin" Text="Log In" NavigateUrl="~/Login.aspx"> </asp:HyperLink> </asp:Panel> </asp:Content> Or what about my ASPX.CS file? Is this the problem? using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Collections.Generic; using System.IO; using System.Drawing; using System.ComponentModel; using System.Data.SqlClient; using ADONET_namespace; using System.Security.Principal; //using System.Windows; public partial class _Default : System.Web.UI.Page //namespace AddFileToSQL { //protected System.Web.UI.HtmlControls.HtmlInputFile uploadFile; protected System.Web.UI.HtmlControls.HtmlInputButton btnOWrite; protected System.Web.UI.HtmlControls.HtmlInputButton btnAppend; protected System.Web.UI.WebControls.Label Label1; protected static string inputfile = ""; public static string targettable; public static string selection; // Number of controls added to view state protected int default_NumberOfControls { get { if (ViewState["default_NumberOfControls"] != null) { return (int)ViewState["default_NumberOfControls"]; } else { return 0; } } set { ViewState["default_NumberOfControls"] = value; } } protected void uploadFile_onclick(object sender, EventArgs e) { } protected void Load_GridData() { GridView1.DataSource = ADONET_methods.DisplaySchemaTables(); GridView1.DataBind(); } protected void btnOWrite_Click(object sender, EventArgs e) { if (uploadFile.PostedFile.ContentLength > 0) { feedbackLabel.Text = "You do not have sufficient access to overwrite table records."; } else { feedbackLabel.Text = "This file does not contain any data."; } } protected void btnAppend_Click(object sender, EventArgs e) { string fullpath = Page.Request.PhysicalApplicationPath; string path = uploadFile.PostedFile.FileName; if (File.Exists(path)) { // Create a file to write to. try { StreamReader sr = new StreamReader(path); string s = ""; while (sr.Peek() > 0) s = sr.ReadLine(); sr.Close(); } catch (IOException exc) { Console.WriteLine(exc.Message + "Cannot open file."); return; } } if (uploadFile.PostedFile.ContentLength > 0) { inputfile = System.IO.File.ReadAllText(path); Session["Message"] = inputfile; Response.Redirect("DataMatch.aspx"); } else { feedbackLabel.Text = "This file does not contain any data."; } } protected void Page_Load(object sender, EventArgs e) { if (Request.IsAuthenticated) { WelcomeBackMessage.Text = "Welcome back, " + User.Identity.Name + "!"; // Reference the CustomPrincipal / CustomIdentity CustomIdentity ident = User.Identity as CustomIdentity; if (ident != null) WelcomeBackMessage.Text += string.Format(" You are the {0} of {1}.", ident.Title, ident.CompanyName); AuthenticatedMessagePanel.Visible = true; AnonymousMessagePanel.Visible = false; //if (!Page.IsPostBack) //{ // Load_GridData(); //} } else { AuthenticatedMessagePanel.Visible = false; AnonymousMessagePanel.Visible = true; } } protected void GridView1_SelectedIndexChanged(object sender, EventArgs e) { GridViewRow row = GridView1.SelectedRow; targettable = row.Cells[2].Text; } }

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  • IE Script Error/JQuery Cycle

    - by ReidHawkins
    I am working on a site and it works/looks great in Safari, Firefox, Chrome and IE8. For some reason when testing it in IE 6 and 7 the jQuery does not work (the images are there but static) I get the following error message: Internet Explorer Script Error. Line: 38 Char: 1 Error: Expected Identifier, string or number Code: 0 Can someone help me out with this? Internet Exploder is killing me....

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  • Help with float numbers in Java

    - by Alvin
    Hi, Could anyone please me why the output of the following programme is not " different different"? public static void main(String[] args) { float f1=3.2f; float f2=6.5f; if(f1==3.2) System.out.println("same"); else System.out.println("different"); if(f2==6.5) System.out.println("same"); else System.out.println("different"); } o/p :different same

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  • django file serving issues

    - by tipu
    I have in my url patterns, urlpatterns += patterns('', (r'^(?P<path>.*)$', 'django.views.static.serve', {'document_root': '/home/tipu/Dropbox/dev/workspace/search/images'}) In my template when I do <link rel="stylesheet" type="text/css" href="{{ MEDIA_URL }}style.css" /> It serves the css just fine. But the file logo.png, that's in the same directory as style.css, doesn't show when I do this: <img src = "{{ MEDIA_URL }}logo.png" id = "logo" /> Any idea why?

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  • #Define's scope throughout library?

    - by Mohit Deshpande
    Say I have a constant: #define PI 3.14 Say I have a static library with multiple header and source files. If I declare this in the header file, will its scope apply to all of the source files? Or do the source files need to include the header with the declaration of PI?

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  • Need help in page curl animation

    - by visu
    Hi, I am developing one static application, which includes the animation like page curl. Is there any way to create the animation like page flipping when the user clicks on the page. Please anybody helps in this, am stroked into this part in my application. Thanks in advance. Vulvaji.

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  • java.lang.UnsatisfiedLinkError

    - by Prashant
    HI ALL, I got an error java.lang.UnsatisfiedLinkError, I am not getting wat the problem is. public static void main(String[] args) { try { System.loadLibrary("pfcasyncmt"); }catch(){ } } ERROR- xception in thread "main" java.lang.UnsatisfiedLinkError: no pfcasyncmt in java.library.path

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  • What does assert do?

    - by peiska
    What does assert do? for example in the function? private static int charAt(String s, int d) { assert d >= 0 && d <= s.length(); if (d == s.length()) return -1; return s.charAt(d); }

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  • Performance Cost of a Memcopy in C/C++

    - by Cenoc
    So whenever I write code I always think about the performance implications. I've often wondered, what is the "cost" of using a memcopy relative to other functions in terms of performance? For example, I may be writing a sequence of numbers to a static buffer and concentrate on a frame within the buffer, in order to keep the frame once I get to the end of the buffer, I might memcopy all of it to the beginning OR I can implement an algorithm to amortize the computation.

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  • How to convert SQL Statement with TOP, COUNT and GROUP BY to return an object list with LINQ

    - by Junior Mayhé
    Hello guys does anyone know how to convert this SQL statement to a LINQ to a List? SELECT TOP(5) COUNT(CategoryId), CategoryName FROM Tickets GROUP BY CategoryName The result would be something like public static List<Categories> List() { MyEntities db = new MyEntities(); /* here it should return a list o Category type */; return db.Category.GroupBy(...).OrderBy(...); }

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  • GUI programming, what to learn, already know console C++

    - by conqrr
    i have already learnt c++ console(love it!) and want to do gui programming, i have looked at Qt but i dont like the size of exe produced at all,even after compressing or static linking.... Shall i learn c# and gui programming?? is it easy to move from c++? what is dot net exactly by the way and how can it be useful to me and my CV in future??

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  • C++ Thread level constants

    - by Gokul
    Is there a way by which we can simulate thread level constants in C++? For example, if i have to make a call to template functions, then i need to mention the constants as template level parameters? I can use static const variables for template metaprogramming, but they are process level constants. I know, i am asking a question with a high probability of 'No'. Just thought of asking this to capitalize on the very rare probability :)) Thanks, Gokul.

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