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  • how to remove dynamically loaded images in javascript

    - by jesse
    I'm loading in 3 images (named 1.jpg, 2.jpg, 3jpg) dynamically to 3 divs called "div1", "div2" and "div3". function loadImages() { for (var i = 1; i < 3; i++ ) { var img = document.createElement("img"); img.src = "vegetables/"+i+".jpg"; img.id = "a"+i+""; var divName = "div"+i+""; document.getElementById(divName).appendChild(img); } } That works, but the removing part I can't seem to get to work.. function removeImages() { for (var i = 1; i < 3; i++ ) { var oldImages = "a"+i+""; var divName = "div"+i+""; document.getElementById(divName).removeChild(oldImages); } } Thank you.

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  • C# / Winforms - Visually remove button click event

    - by Wayne Koorts
    .NET newbie alert Using Visual C# 2008 Express Edition I have accidentally created a click event for a button. I then deleted the automatically-created method code, which resulted in an error saying that the function, which had now been referenced in the form loading code, could no longer be found. Deleting the following line from the Form1.Designer.cs file's InitializeComponent() function... this.btnCopy.Click += new System.EventHandler(this.btnCopy_Click); ... seems to do the trick, however, it makes me feel very dirty because of the following warning at the beginning of the #region: /// Required method for Designer support - do not modify /// the contents of this method with the code editor. I haven't been able to find a way to do this using the form designer, which I assume is the means implied by this warning. What is the correct way to do this?

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  • Assignment to None

    - by Joel
    Hello, I have a function which returns 3 numbers, e.g.: def numbers(): return 1,2,3 usually I call this function to receive all three returned numbers e.g.: a,b,c=numbers() However, I have one case in which I only need the first returned number. I tried using: a, None None = numbers() But I receive "SyntaxError: assignment to None". I know, of course, that i can use the first option I mentioned and then not use "b" and "c", but only "a". However, this seems like a "waste" of two vars and feels like wrong programming. Any ideas? Thanks, Joek

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  • XSD NewDataSet Namespace?

    - by Ian
    I'm running XSD on an XML file and getting something strange. Depending on the depth of elements it produces a 'NewDataSet' element which will then is prefixed in Visual Studio to my auto-generated classes which is something I don't want. I've got quite a complex structure and am just trying to add a simple version element or attribute which is causing the problem. The simplest demo I could come up with is this. <A> <B>Text</B> </A> Running this through XSD says there is an element called 'NewDataSet' which may or may not appear and will prefix namespaces. <A> <B> <C>Text</C> </B> </A> This example works as expected and there is no magic 'NewDataSet' element in the generated XSD file.

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  • md5 hash for file without File Attributes

    - by Glennular
    Using the following code to compute MD5 hashs of files: Private _MD5Hash As String Dim md5 As New System.Security.Cryptography.MD5CryptoServiceProvider Dim md5hash() As Byte md5hash = md5.ComputeHash(Me._BinaryData) Me._MD5Hash = ByteArrayToString(md5hash) Private Function ByteArrayToString(ByVal arrInput() As Byte) As String Dim sb As New System.Text.StringBuilder(arrInput.Length * 2) For i As Integer = 0 To arrInput.Length - 1 sb.Append(arrInput(i).ToString("X2")) Next Return sb.ToString().ToLower End Function We are getting different hashes depending on the create-date and modify-date of the file. We are storing the hash and the binary file in a SQL DB. This works fine when we upload the same instance of a file. But when we save a new instance of the file from the DB (with today's date as the create/modify) on the file-system and then check the new hash versus the MD5 stored in the DB they do not match, and therefor fail a duplicate check. How can we check for a file hash excluding the file attributes? or is there a different issue here?

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  • perl split on empty file

    - by Casey
    I have basically the following perl I'm working with: open I,$coupon_file or die "Error: File $coupon_file will not Open: $! \n"; while (<I>) { $lctr++; chomp; my @line = split/,/; if (!@line) { print E "Error: $coupon_file is empty!\n\n"; $processFile = 0; last; } } I'm having trouble determining what the split/,/ function is returning if an empty file is given to it. The code block if (!@line) is never being executed. If I change that to be if (@line) than the code block is executed. I've read information on the perl split function over at http://perldoc.perl.org/functions/split.html and the discussion here about testing for an empty array but not sure what is going on here. I am new to Perl so am probably missing something straightforward here. Thanks.

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  • Partial overriding in Java (or dynamic overriding while overloading)

    - by Lie Ryan
    If I have a parent-child that defines some method .foo() like this: class Parent { public void foo(Parent arg) { System.out.println("foo in Function"); } } class Child extends Parent { public void foo(Child arg) { System.out.println("foo in ChildFunction"); } } When I called them like this: Child f = new Child(); Parent g = f; f.foo(new Parent()); f.foo(new Child()); g.foo(new Parent()); g.foo(new Child()); the output is: foo in Parent foo in Child foo in Parent foo in Parent But, I want this output: foo in Parent foo in Child foo in Parent foo in Child I have a Child class that extends Parent class. In the Child class, I want to "partially override" the Parent's foo(), that is, if the argument arg's type is Child then Child's foo() is called instead of Parent's foo(). That works Ok when I called f.foo(...) as a Child; but if I refer to it from its Parent alias like in g.foo(...) then the Parent's foo(..) get called irrespective of the type of arg. As I understand it, what I'm expecting doesn't happen because method overloading in Java is early binding (i.e. resolved statically at compile time) while method overriding is late binding (i.e. resolved dynamically at compile time) and since I defined a function with a technically different argument type, I'm technically overloading the Parent's class definition with a distinct definition, not overriding it. But what I want to do is conceptually "partially overriding" when .foo()'s argument is a subclass of the parent's foo()'s argument. I know I can define a bucket override foo(Parent arg) in Child that checks whether arg's actual type is Parent or Child and pass it properly, but if I have twenty Child, that would be lots of duplication of type-unsafe code. In my actual code, Parent is an abstract class named "Function" that simply throws NotImplementedException(). The children includes "Polynomial", "Logarithmic", etc and .foo() includes things like Child.add(Child), Child.intersectionsWith(Child), etc. Not all combination of Child.foo(OtherChild) are solvable and in fact not even all Child.foo(Child) is solvable. So I'm best left with defining everything undefined (i.e. throwing NotImplementedException) then defines only those that can be defined. So the question is: Is there any way to override only part the parent's foo()? Or is there a better way to do what I want to do?

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  • How to update a table row with save button using .ajax

    - by Randall
    I have a table which has one row and only one cell will be editable. I have accomplished this with the following code. $("td#effEndDate").click(function() { if (!$(this).hasClass("edit")) { var value = jQuery.trim($(this).html()); $(this).html("<input id=\"txtEdit\" type=\"text\" value=\"" + value + "\" />"); $(this).addClass("edit"); $("#txtEdit").focus(); } }); Now this is the part where i'm stuck. After the field is updated a save button must be clicked to call the proper .ajax method to update the database. But how can I compare the previous value to the current value on a button press? Since i'm not using the onblur property where I could have saved the old value and passed it to the update function.

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  • jquery load method

    - by cognos79
    I am using mscaptcha image and trying to only reload the captcha image on button click. Seems like the captcha image is being loaded twice sometimes. <script type="text/javascript"> $(document).ready(function() { $('#btnSubmit').click(function() { $('#dvCaptcha').load('default.aspx #dvCaptcha'); }); }); </script> <div id="btnDiv"> <asp:Button ID="btnSubmit" runat="server" Text="Submit" /> </div> <div id="dvCaptcha"> <cc1:CaptchaControl ID="ccJoin" runat="server" CaptchaBackgroundNoise="none" CaptchaLength="5" CaptchaHeight="60" CaptchaWidth="200" CaptchaLineNoise="None" CaptchaMinTimeout="5" CaptchaMaxTimeout="240" /> </div> Any ideas?

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  • How to override the behavior of Input type="file" Browse button?

    - by jay sean
    Hi All, I need to change the locale/language of the browse button in input type="file" We have a special function to change the locale of any text to the browser language such as en-US es-MX etc. Say changeLang("Test"); // This will display test in Spanish if the browser // locale is es-MX What I need to do is to change the language of the browse button. Since it is not displayed, I can't code it like changeLang("Browse..."); That's why I need to get the code of this input type and override so that I can apply my function to Browse text. It will be appreciated if you can give a solution for this. Thanks! Jay...

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  • compiler warning at C++ template base class

    - by eike
    I get a compiler warning, that I don't understand in that context, when I compile the "Child.cpp" from the following code. (Don't wonder: I stripped off my class declarations to the bare minuum, so the content will not make much sense, but you will see the problem quicker). I get the warning with VS2003 and VS2008 on the highest warning level. The code AbstractClass.h : #include <iostream> template<typename T> class AbstractClass { public: virtual void Cancel(); // { std::cout << "Abstract Cancel" << std::endl; }; virtual void Process() = 0; }; //outside definition. if I comment out this and take the inline //definition like above (currently commented out), I don't get //a compiler warning template<typename T> void AbstractClass<T>::Cancel() { std::cout << "Abstract Cancel" << std::endl; } Child.h : #include "AbstractClass.h" class Child : public AbstractClass<int> { public: virtual void Process(); }; Child.cpp : #include "Child.h" #include <iostream> void Child::Process() { std::cout << "Process" << std::endl; } The warning The class "Child" is derived from "AbstractClass". In "AbstractClass" there's the public method "AbstractClass::Cancel()". If I define the method outside of the class body (like in the code you see), I get the compiler warning... AbstractClass.h(7) : warning C4505: 'AbstractClass::Cancel' : unreferenced local function has been removed with [T=int] ...when I compile "Child.cpp". I do not understand this, because this is a public function and the compiler can't know if I later reference this method or not. And, in the end, I reference this method, because I call it in main.cpp and despite this compiler warning, this method works if I compile and link all files and execute the program: //main.cpp #include <iostream> #include "Child.h" int main() { Child child; child.Cancel(); //works, despite the warning } If I do define the Cancel() function as inline (you see it as out commented code in AbstractClass.h), then I don't get the compiler warning. Of course my program works, but I want to understand this warning or is this just a compiler mistake? Furthermore, if do not implement AbsctractClass as a template class (just for a test purpose in this case) I also don't get the compiler warning...?

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  • LINQ how to concatenate 2 db columns to display in dropdownlist

    - by Simke Nys
    I'm trying to concatenate product_name with product_prize_kg by using LINQ so I can display it as one field in a dropdownlist. When I try to do this I get the following error. value of type 'system.collections.generic.list(of anonymous type )' cannot be converted to ... My code is like this: Public Function selectAll() As List(Of tblProduct) Dim result = From product In dc.tblProducts Select New With { Key .productID = product.pk_product_id, Key .productNameKg = Convert.ToString(product.product_name) & " " & Convert.ToString(product.product_price_kg) } Return result.ToList() End Function This is the dropdownlist that I want to fill. <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="ObjectDataSource1" DataTextField="productNameKg" DataValueField="productID"> </asp:DropDownList> Thanks Grtz Simke

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  • Using boost.python to import a method with opencv calls but failing due to symbols not being found a

    - by nmz787
    So I don't have the code right now, as I am not home... but i used the boost library for python in C++ to allow python to access a function called something like loadImageIntoMainWindow(string filepath) in the C++ source code the method calls opencv methods that are imported at the top of the file, I included opencv in my Jamroot file, and also found a way to compile and link manually on the command line... in either case when I run my python file it complains that the symbols aren't found for the first function call to an opencv method... I will update as soon as I get home with the C++, the command line compilation lines, the Jamroot, and the python files

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  • CakePHP Accessing Dynamically Created Tables?

    - by Dave
    As part of a web application users can upload files of data, which generates a new table in a dedicated MySQL database to store the data in. They can then manipulate this data in various ways. The next version of this app is being written in CakePHP, and at the moment I can't figure out how to dynamically assign these tables at runtime. I have the different database config's set up and can create the tables on data upload just fine, but once this is completed I cannot access the new table from the controller as part of the record CRUD actions for the data manipulate. I hoped that it would be along the lines of function controllerAction(){ $this->uses[] = 'newTable'; $data = $this->newTable->find('all'); //use data } But it returns the error Undefined property: ReportsController::$newTable Fatal error: Call to a member function find() on a non-object in /app/controllers/reports_controller.php on line 60 Can anyone help.

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  • Statistics: combinations in Python

    - by Morlock
    I need to compute combinatorials (nCr) in Python but cannot find the function to do that in 'math', 'numyp' or 'stat' libraries. Something like a function of the type: comb = calculate_combinations(n, r) I need the number of possible combinations, not the actual combinations, so itertools.combinations does not interest me. Finally, I want to avoid using factorials, as the numbers I'll be calculating the combinations for can get to big and the factorials are going to be monstruous. This seems like a REALLY easy to answer question, however I am being drowned in questions about generating all the actual combinations, which is not what I want. :) Many thanks

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  • How do I do an AJAX post to a url within a class library but not the same IIS Web Application?

    - by Mark Adesina
    I have been working with ajax and there has been no problems below is how my ajax post code look like: $.ajax({ type: "POST", url: '<%=ResolveUrl("TodoService.asmx/CreateNewToDo")%>', data: jsonData, contentType: "application/json; charset=utf-8", datatype: "json", success: function () { //if (msg.d) { $('#ContentPlaceHolder1_useridHiddenField').val(""); $('#ContentPlaceHolder1_titleTextBox').val(""); $('#ContentPlaceHolder1_destTextBox').val(""); $('#ContentPlaceHolder1_duedateTextBox').val(""); alert('Your todo has been saved'); // } }, error: function (msg) { alert('There was an error processing your request'); } }); However, the problem came up when I try to get the url to a webservice that is located in a class library within the same solution.

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  • How do you balance business process changes against the challenges of changing software?

    - by Achilles
    In my admittedly young career I've found myself writing code to support quirky business rules and processes. Inevitably these changes were always in some massively difficult code base and caused many issues. My question has a couple of parts: While software is a tool for businesses to make their lives easier, at what point do we as developers suggest a change in business process rather than in the software as the "magic bullet" to solve a particular problem. How do we as developers evangelize a certain level of reverence for the software as well as the difficulty involved in making changes simply to support the quirks of the business? I understand that these changes in business processes promote our industry, but in an analogy my father would understand: Which is easier, to melt down a hammer to forge a screwdriver to drive screws or to simply use nails since your hammer is already awesome...?

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  • javascript problems when generating html reports from within java

    - by posdef
    Hi, I have been working on a Java project in which the reports will be generated in HTML, so I am implementing methods for creating these reports. One important functionality is to be able to have as much info as possible in the tables, but still not clutter too much. In other words the details should be available if the user wishes to take a look at them but not necessarily visible by default. I have done some searching and testing and found an interesting template for hiding/showing content with the use of CSS and javascript, the problem is that when I try the resultant html page the scripts dont work. I am not sure if it's due a problem in Java or in the javascript itself. I have compared the html code that java produces to the source where I found the template, they seem to match pretty well. Below are bits of my java code that generates the javascript and the content, i would greatly appreciate if anyone can point out the possible reasons for this problem: //goes to head private void addShowHideScript() throws IOException{ StringBuilder sb = new StringBuilder(); sb.append("<script type=\"text/javascript\" language=\"JavaScript\">\n"); sb.append("<!--function HideContent(d) {\n"); sb.append("document.getElementById(d).style.display=\"none\";}\n"); sb.append("function ShowContent(d) {\n"); sb.append("document.getElementById(d).style.display=\"block\";}\n"); sb.append("function ReverseDisplay(d) {\n"); sb.append("if(document.getElementById(d).style.display==\"none\")\n"); sb.append("{ document.getElementById(d).style.display=\"block\"; }\n"); sb.append("else { document.getElementById(d).style.display=\"none\"; }\n}\n"); sb.append("//--></script>\n"); out.write(sb.toString()); out.newLine(); } // body private String linkShowHideContent(String pathname, String divname){ StringBuilder sb = new StringBuilder(); sb.append("<a href=\"javascript:ReverseDisplay('"); sb.append(divname); sb.append("')\">"); sb.append(pathname); sb.append("</a>"); return sb.toString(); } // content out.write(linkShowHideContent("hidden content", "ex")); out.write("<div id=\"ex\" style=\"display:block;\">"); out.write("<p>Content goes here.</p></div>");

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  • How do I use a Rails ActiveRecord migration to insert a primary key into a MySQL database?

    - by Terry Lorber
    I need to create an AR migration for a table of image files. The images are being checked into the source tree, and should act like attachment_fu files. That being the case, I'm creating a hierarchy for them under /public/system. Because of the way attachment_fu generates links, I need to use the directory naming convention to insert primary key values. How do I override the auto-increment in MySQL as well as any Rails magic so that I can do something like this: image = Image.create(:id => 42, :filename => "foo.jpg") image.id #=> 42

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  • Jquery simplemodal close existing modal and open a new one?

    - by matthewsteiner
    Alright, so all modals already have an image at the top right to close them. How can I make additionally another anchor to do the same thing? I thought I could use the "closeClass" option which default to "simplemodal-close" and just add that class to an anchor, but it didn't have the desired effect. Is that what I'm supposed to do? Also, all modals will have a "contact us" link which should close it's own modal and open the contact modal. How can I wait until it is closed to open the next one? Ideas? $('a#ask').click(function(){ $.modal.close(function(){ }); $('#modal-contact').modal(); });

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  • KO 2.3.4 - Accessing validation array from callbacks in models

    - by kenny99
    Hi, Apologies if this is an oversight or sheer stupidity on my part but I can't quite figure out how to access the validation array from a callback in a model (using ORM and KO 2.3.4). I want to be able to add specific error messages to the validation array if a callback returns false. e.g This register method: public function register(array & $array, $save = FALSE) { // Initialise the validation library and setup some rules $array = Validation::factory($array) ->pre_filter('trim') ->add_rules('email', 'required', 'valid::email', array($this, 'email_available')) ->add_rules('confirm_email', 'matches[email]') ->add_rules('password', 'required', 'length[5,42]') ->add_rules('confirm_password', 'matches[password]'); return ORM::validate($array, $save); } Callback: public function email_available($value) { return ! (bool) $this->db ->where('email', $value) ->count_records($this->table_name); } I can obviously access the current model from the callback, but I was wondering what the best way to add custom error from the callback would be?

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  • iPhone. UITableView and pushing view controller

    - by Jacek
    Hello. I have a working UITableView in my view controller. It is being successfully populated and seems to be fine. However, when I try using following function, new view is not loaded (function is called, I get output from NSLog): - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { NSLog(@"asf"); [self.navigationController pushViewController:sendRequestFavoriteController animated:YES]; } What might be a problem? I get no compilation or debugging errors/warnings. Maybe UITabBar's navigation controller?

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  • JQuery autocomplete: is not working asp.net

    - by Abu Hamzah
    is that something wrong in the below code? its not firing at all edit <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="HostPage.aspx.cs" Inherits="HostPage" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>Untitled Page</title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js"></script> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script> <link rel="stylesheet" href="http://dev.jquery.com/view/trunk/plugins/autocomplete/jquery.autocomplete.css" type="text/css" /> <script type="text/javascript" src="http://dev.jquery.com/view/trunk/plugins/autocomplete/jquery.autocomplete.js"></script> </head> <body> <form id="form1" runat="server"> <script type="text/javascript"> $(document).ready(function() { $("#<%=txtHost.UniqueID %>").autocomplete("HostService.asmx/GetHosts", { dataType: 'json' , contentType: "application/json; charset=utf-8" , parse: function(data) { var rows = Array(); debugger for (var i = 0; i < data.length; i++) { rows[i] = { data: data[i], value: data[i].LName, result: data[i].LName }; } return rows; } , formatItem: function(row, i, max) { return data.LName + ", " + data.FName; } }); }); </script> <div> <asp:Label runat="server" ID='Label4' >Host Name:</asp:Label> <asp:TextBox ID="txtHost" runat='server'></asp:TextBox> <p> </div> </form> </body> </html>

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  • An IOCP documentation interpretation question - buffer ownership ambiguity

    - by Poni
    Since I'm not a native English speaker I might be missing something so maybe someone here knows better than me. Taken from WSASend's doumentation at MSDN: lpBuffers [in] A pointer to an array of WSABUF structures. Each WSABUF structure contains a pointer to a buffer and the length, in bytes, of the buffer. For a Winsock application, once the WSASend function is called, the system owns these buffers and the application may not access them. This array must remain valid for the duration of the send operation. Ok, can you see the bold text? That's the unclear spot! I can think of two translations for this line (might be something else, you name it): Translation 1 - "buffers" refers to the OVERLAPPED structure that I pass this function when calling it. I may reuse the object again only when getting a completion notification about it. Translation 2 - "buffers" refer to the actual buffers, those with the data I'm sending. If the WSABUF object points to one buffer, then I cannot touch this buffer until the operation is complete. Can anyone tell what's the right interpretation to that line? And..... If the answer is the second one - how would you resolve it? Because to me it implies that for each and every data/buffer I'm sending I must retain a copy of it at the sender side - thus having MANY "pending" buffers (in different sizes) on an high traffic application, which really going to hurt "scalability". Statement 1: In addition to the above paragraph (the "And...."), I thought that IOCP copies the data to-be-sent to it's own buffer and sends from there, unless you set SO_SNDBUF to zero. Statement 2: I use stack-allocated buffers (you know, something like char cBuff[1024]; at the function body - if the translation to the main question is the second option (i.e buffers must stay as they are until the send is complete), then... that really screws things up big-time! Can you think of a way to resolve it? (I know, I asked it in other words above).

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