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  • A question on vectors, pointers and iterators

    - by xbonez
    Guys, I have a midterm examination tomorrow, and I was looking over the sample paper, and I'm not sure about this question. Any help would be appreciated. Let v be a vector<Thingie*>, so that each element v[i] contains a pointer to a Thingie. If p is a vector<Thingie*>::iterator, answer the following questions: what type is p? what type is *p? what code provides the address of the actual Thingie? what code provides the actual Thingie?

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  • Change of a background image of a button on onclick event

    - by Alpan67
    Why does this not work ? In Firebug, when I click on the button, it always says to me that cambiaBandiera is not defined ... HELP Alex CSS ITA{ float:right; margin : 5px 85px; width:40px; height:40px; background : #FFFFFF url("../ITA_off.png") center center no-repeat; border:0; } JAVASCRIPT (in HEAD) style type="text/javascript" function cambiaBandiera() { test=document.getElementById("ITA"); test.style.backgroundImage="url('../ITA_on.png')"; } /style and this is HTML div id="bandiere" input type="button" id="ITA" onClick="cambiaBandiera()" /input /div

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  • Is there a way to determine the Variance of an Interface / Delegate in C# 4.0?

    - by BFree
    So now that we have generic Covariance and Contravariance on interfaces and delegates in C#, I was just curious if given a Type, you can figure out the covariance/contravariance of its generic arguments. I started trying to write my own implementation, which would look through all of the methods on a given type and see if the return types and or arguments match the types in the generic arguments. The problem is that even if I have this: public interface IFoo<T> { void DoSomething(T item); } using my logic, it LOOKS like it should be contravariant, but since we didn't actually specify: public interface IFoo<in T> { void DoSomething(T item); } (the in parameter) it isn't actually contravariant. Which leads to my question: Is there a way to determine the variance of generic parameters?

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  • How do I implement .net plugins without using AppDomains?

    - by Abtin Forouzandeh
    Problem statement: Implement a plug-in system that allows the associated assemblies to be overwritten (avoid file locking). In .Net, specific assemblies may not be unloaded, only entire AppDomains may be unloaded. I'm posting this because when I was trying to solve the problem, every solution made reference to using multiple AppDomains. Multiple AppDomains are very hard to implement correctly, even when architected at the start of a project. Also, AppDomains didn't work for me because I needed to transfer Type across domains as a setting for Speech Server worfklow's InvokeWorkflow activity. Unfortunately, sending a type across domains causes the assembly to be injected into the local AppDomain. Also, this is relevant to IIS. IIS has a Shadow Copy setting that allows an executing assembly to be overwritten while its loaded into memory. The problem is that (at least under XP, didnt test on production 2003 servers) when you programmatically load an assembly, the shadow copy doesnt work (because you are loading the DLL, not IIS).

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  • Problems rendering pages in FF and IE

    - by Michael
    I am having a constant trouble with pages not rendering correctly between FF and IE. not my code below. "Select an Account" should be next to the drop down such as: Select an Account Type: "then my form" however my form goes to the next line when I want it next to "Select an Account". In IE it renders correctly in FF it does not. <p><b><strong>Select an Account Type <FORM NAME="myform"> <SELECT NAME="mylist"> <OPTION VALUE="traditional">Traditional Account <OPTION VALUE="paperless">Paperless Account </SELECT> </FORM></b></strong></p>

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  • How do I learn Flash Game Development?

    - by grokker
    I'm currently a PHP programmer and one of my childhood dreams is to create a game. The problem is I don't know Flash. I'm not great at drawing stuff or even artistic. I could program a little with JavaScript and I could consider myself intermediate with JQuery. Question How do I get started with Flash Game development? What books do I read first? The type of game is a side scroller about an Indiana Jones type of character and the setting is on the jungle with trees and snakes and a lot of animals.

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  • Sharepoint 2007 : Saving Form data with page redirection using custom parameters.

    - by Deepu
    HI Experts, After saving the form data I would like to REDIRECT to different pages based on the @Status value using the input type button. <input type="button" value="Save" name="btnSave" id="btnSave" onclick="{ddwrt:GenFireServerEvent('_commit;_redirect={*Confirm.aspx?ID=1}')};" /* if @Status == "Draft" url = "draft.aspx ? ID = " @ID else if @Status == "Save" url = "save.aspx ? ID = " @ID else url = "confirm.aspx ? ID = " @ID Here @ID and @Status are share point list column names Now I have hard-coded the url Confirm.aspx?ID=4. But I want to check the status value using XSLT condition and set different URL name with @ID value.. How do I achieve this.. any help would be appreciated.. thanks deepu

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  • Pascal - bad number format

    - by Donator
    Program: program s; type info = record name, surname: string; min, sek: integer; end; type arrays = array[1..50] of info; var c, b: text; A: arrays; gr_sk, grup_dal: integer; begin assign(c, 'info.txt'); reset(c); read(c, gr_sk); read(c, grup_dal); id := 1; read(c, A[id].name); read(c, A[id].sek); close(c); end. info.txt file: 3 4 yhgf 4 Please, tell me what is wrong with that. It says that it is bad number format for line 19 I guess.

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  • Jquery getting list of values of hidden inputs within a div

    - by RandyMarsh
    I am trying to get a list of values within a div that I will format later using the .each() method. They are input values which are hidden my html and jquery call looks like this. <div id="container_0"> <input type="hidden" id="check_data" value=10> <input type="hidden" id="check_data" value=20> </div> Jquery: var list = $('#container_0 input#check_data'); $(list).each( function() { alert($(this).val()); } ); This however is not returning any values. Any help would be greatly appreciated.

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  • Openlayers and Bing Maps (POLYGONS)

    - by Jordan
    When trying to draw polygons onto a bing map, the initial marker is set differently on the map. How can I fix this? OpenLayers Bing Example <script src="OpenLayers.js"></script> <script> var map; function init(){ map = new OpenLayers.Map("map"); map.addControl(new OpenLayers.Control.LayerSwitcher()); var shaded = new OpenLayers.Layer.VirtualEarth("Shaded", { type: VEMapStyle.Shaded }); var hybrid = new OpenLayers.Layer.VirtualEarth("Hybrid", { type: VEMapStyle.Hybrid }); var aerial = new OpenLayers.Layer.VirtualEarth("Aerial", { type: VEMapStyle.Aerial }); var POLY_LAYER = new OpenLayers.Layer.Vector(); map.addLayers([shaded, hybrid, aerial, POLY_LAYER]); map.setCenter(new OpenLayers.LonLat(-110, 45), 3); var polygon = new OpenLayers.Control.DrawFeature(POLY_LAYER, OpenLayers.Handler.Polygon); map.addControl(polygon); polygon.activate(); } </script> Bing Example <div id="tags"> Bing, Microsoft, Virtual Earth </div> <p id="shortdesc"> Demonstrates the use of Bing layers. </p> <div id="map" class="smallmap"></div> <div id="docs">This example demonstrates the ability to create layers using tiles from Bing maps.</div> Of course the above is being initialized and page works. You can draw the polygon shapes. Notice if you zoom in or out one time, the markers are set at the correct coordinates. My app I was testing this on is really using the bing maps API keys and not VirtualEarth. But it's doing a similar thing. Is this an Openlayers bug? The below source came directly from the open layers example site, I just added and activated polygons to the map. Please let me know how I can fix this for using the Bing Map API.. I've been stuck on this for HOURS! :(

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  • Dynamic Dispatch without Virtual Functions

    - by Kristopher Johnson
    I've got some legacy code that, instead of virtual functions, uses a kind field to do dynamic dispatch. It looks something like this: // Base struct shared by all subtypes // Plain-old data; can't use virtual functions struct POD { int kind; int GetFoo(); int GetBar(); int GetBaz(); int GetXyzzy(); }; enum Kind { Kind_Derived1, Kind_Derived2, Kind_Derived3 }; struct Derived1: POD { Derived1(): kind(Kind_Derived1) {} int GetFoo(); int GetBar(); int GetBaz(); int GetXyzzy(); // plus other type-specific data and function members }; struct Derived2: POD { Derived2(): kind(Kind_Derived2) {} int GetFoo(); int GetBar(); int GetBaz(); int GetXyzzy(); // plus other type-specific data and function members }; struct Derived3: POD { Derived3(): kind(Kind_Derived3) {} int GetFoo(); int GetBar(); int GetBaz(); int GetXyzzy(); // plus other type-specific data and function members }; and then the POD class's function members are implemented like this: int POD::GetFoo() { // Call kind-specific function switch (kind) { case Kind_Derived1: { Derived1 *pDerived1 = static_cast<Derived1*>(this); return pDerived1->GetFoo(); } case Kind_Derived2: { Derived2 *pDerived2 = static_cast<Derived2*>(this); return pDerived2->GetFoo(); } case Kind_Derived3: { Derived3 *pDerived3 = static_cast<Derived3*>(this); return pDerived3->GetFoo(); } default: throw UnknownKindException(kind, "GetFoo"); } } POD::GetBar(), POD::GetBaz(), POD::GetXyzzy(), and other members are implemented similarly. This example is simplified. The actual code has about a dozen different subtypes of POD, and a couple dozen methods. New subtypes of POD and new methods are added pretty frequently, and so every time we do that, we have to update all these switch statements. The typical way to handle this would be to declare the function members virtual in the POD class, but we can't do that because the objects reside in shared memory. There is a lot of code that depends on these structs being plain-old-data, so even if I could figure out some way to have virtual functions in shared-memory objects, I wouldn't want to do that. So, I'm looking for suggestions as to the best way to clean this up so that all the knowledge of how to call the subtype methods is centralized in one place, rather than scattered among a couple dozen switch statements in a couple dozen functions. What occurs to me is that I can create some sort of adapter class that wraps a POD and uses templates to minimize the redundancy. But before I start down that path, I'd like to know how others have dealt with this.

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  • Confused about adding multiple td's to tr using jQuery

    - by Jason
    So I have the following code: <script type="text/javascript"> $(document).ready( function () { $("#txt").click(function () { var $TableRow = $('<tr></tr>'); var $TableData = $('<td></td>'); var $TableData2 = $('<td></td>'); // Works $("#tblControls").append( $TableRow.html( $TableData.text("Test, Hello World3") ) ); </script> <div style="display: inline"> <input type="button" id="txt" value="Add TextBox" style="" /> </div> <br/> <table id="tblControls" width="100%"> </table> But why does this not add two td's to the tr? $("#tblControls").append( $TableRow.html( $TableData.text("Test, Hello World3") + $TableData2.text("Test, Hello World4") ) ); What I get is this: [object Object][object Object]

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  • C# dependency injection - how to you inject a dependency without source?

    - by Phil Harris
    Hi, I am trying to get started with some simple dependency injection using C# and i've run up against an issue that I can't seem to come up with an answer for. I have a class that was written by another department for which I don't have the source in my project. I wanted to inject an object of this type though a constructor using an interface, but of course, i can't change the injected objects implementation to implement the interface to achieve polymorphism when casting the object to the interface type. Every academic example I have ever seen of this technique has the classes uses classes which are declared in the project itself. How would I go about injecting my dependency without the source being available in the project? I hope that makes sense, thanks.

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  • LINQ in SQLite for Windows store app does not have 'ThenBy' to order by multiple columns

    - by user1131657
    I have a Windows 8 store application and I'm using the latest version on SQLite for my database. So I want to return some records from the database and I want to order them by more that one column. However SQLite doesn't seem to have the ThenBy statement? So my LINQ statement is below: from i in connection.Table<MyTable>() where i.Type == type orderby i.Usage_Counter // ThenBy i.ID select i); So how do I sort by multiple columns in SQLite without doing another LINQ statement?

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  • Can MySQL reasonably perform queries on billions of rows?

    - by haxney
    I am planning on storing scans from a mass spectrometer in a MySQL database and would like to know whether storing and analyzing this amount of data is remotely feasible. I know performance varies wildly depending on the environment, but I'm looking for the rough order of magnitude: will queries take 5 days or 5 milliseconds? Input format Each input file contains a single run of the spectrometer; each run is comprised of a set of scans, and each scan has an ordered array of datapoints. There is a bit of metadata, but the majority of the file is comprised of arrays 32- or 64-bit ints or floats. Host system |----------------+-------------------------------| | OS | Windows 2008 64-bit | | MySQL version | 5.5.24 (x86_64) | | CPU | 2x Xeon E5420 (8 cores total) | | RAM | 8GB | | SSD filesystem | 500 GiB | | HDD RAID | 12 TiB | |----------------+-------------------------------| There are some other services running on the server using negligible processor time. File statistics |------------------+--------------| | number of files | ~16,000 | | total size | 1.3 TiB | | min size | 0 bytes | | max size | 12 GiB | | mean | 800 MiB | | median | 500 MiB | | total datapoints | ~200 billion | |------------------+--------------| The total number of datapoints is a very rough estimate. Proposed schema I'm planning on doing things "right" (i.e. normalizing the data like crazy) and so would have a runs table, a spectra table with a foreign key to runs, and a datapoints table with a foreign key to spectra. The 200 Billion datapoint question I am going to be analyzing across multiple spectra and possibly even multiple runs, resulting in queries which could touch millions of rows. Assuming I index everything properly (which is a topic for another question) and am not trying to shuffle hundreds of MiB across the network, is it remotely plausible for MySQL to handle this? UPDATE: additional info The scan data will be coming from files in the XML-based mzML format. The meat of this format is in the <binaryDataArrayList> elements where the data is stored. Each scan produces = 2 <binaryDataArray> elements which, taken together, form a 2-dimensional (or more) array of the form [[123.456, 234.567, ...], ...]. These data are write-once, so update performance and transaction safety are not concerns. My naïve plan for a database schema is: runs table | column name | type | |-------------+-------------| | id | PRIMARY KEY | | start_time | TIMESTAMP | | name | VARCHAR | |-------------+-------------| spectra table | column name | type | |----------------+-------------| | id | PRIMARY KEY | | name | VARCHAR | | index | INT | | spectrum_type | INT | | representation | INT | | run_id | FOREIGN KEY | |----------------+-------------| datapoints table | column name | type | |-------------+-------------| | id | PRIMARY KEY | | spectrum_id | FOREIGN KEY | | mz | DOUBLE | | num_counts | DOUBLE | | index | INT | |-------------+-------------| Is this reasonable?

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  • Use a styleshhet when NOT IE

    - by Sam Gregory
    When i use this code <!--[if IE 6]> <link rel="stylesheet" href="ie6.css" type="text/css" /> <![endif]--> <!--[if !IE]> <link rel="stylesheet" href="not_ie.css" type="text/css" /> <![endif]--> IE 6 does correctly use the specified stylesheet but all other browsers ignore both when they should be using the one that basically states, use this stylesheet if you are not IE. Any ideas?

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  • JQuery datepicker

    - by showFocus
    Coud someone help me with this? I am getting these question marks in the graphic and i'm not sure why? I have seen these symbols before and i am sure it had something to do with charset. I am using: <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> Here is my JQuery code <script type="text/javascript"> $(function() { var date = $('#date').datepicker({ minDate: 0, dateFormat: "dd/mm/yy", beforeShowDay: function(date){ if (date.getDay() == 0){ return [false, '']; } else { return [true, '']; } } } ); }); </script> Image can be found here: http://kevinhenney.com/jquery-datepicker.jpg Tried to add an imaghe in the post, not allowed just yet. Thanks in advance

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  • XML jQuery Problem

    - by Llamabomber
    This code for parsing my xml and appending via jquery seems to work great in every browser but Chrome (Mac only, the windows version of chrome works fine) and explorer. I'm not aware of any glaring issues in the code so I thought some fresh eyes might help. Anyone know what could be causing IE and Chrome on the mac to not append? <script type="text/javascript" charset="utf-8"> $(document).ready(function() { $.ajax({ type: "GET", url: "sitenav.xml", dataType: "xml", success: parseXml }); function parseXml(xml) { $(xml).find("GoogleAnalytics").each(function() { $("li#google_analytics").append('<ul><li>' + $(this).find("NavHeader").text() + '</li></ul>'); }); } }); </script>

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  • How might one implement FileTimeToSystemTime?

    - by Billy ONeal
    Hello :) I'm writing a simple wrapper around the Win32 FILETIME structure. boost::datetime has most of what I want, except I need whatever date type I end up using to interpolate with Windows APIs without issues. To that end, I've decided to write my own things for doing this -- most of the operations aren't all that complicated. I'm implementing the TimeSpan - like type at this point, but I'm unsure how I'd implement FileTimeToSystemTime. I could just use the system's built-in FileTimeToSystemTime function, except FileTimeToSystemTime cannot handle negative dates -- I need to be able to represent something like "-12 seconds". How should something like this be implemented? Billy3

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  • How to create two dimensional array in jquery or js

    - by learner
    I need to create dynamic global two dimensional array in jquery or javascript My function is like this <script> var index = 0; var globalArray = new Array(); function createArray(){ var loop = globalArray[index].length; var name = $.("#uname").val(); if(loop == 0){ globalArray[index][0] = uname; }else{ globalArray[index][loop++] = uname; } } </script> <div><input type="text" id="uname"> <input type='button' value='save' onclick='createArray();'> </div> On click of that button I am getting this error "globalArray[index] is undefined" How can I create one global array using jquery or javascript like this. I dont want any hidden field and all. Please help me. Thanks

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  • Is there a way to query if array field contains a certain value in Doctrine2?

    - by dpimka
    Starting out with Symfony2 + Doctrine. I have a table with User objects (fos_user), for which my schema contains a roles column of an 'array' type. Doctrine saves fields of this type by serializing them from php 'array' to 'longtext' (in mysql's case). So let's say I have the following users saved into DB: **User1**: array(ROLE_ADMIN, ROLE_CUSTOM1) **User2**: array(ROLE_ADMIN, ROLE_CUSTOM2) **User3**: array(ROLE_CUSTOM2) Now in my controller I want to select all users with ROLE_ADMIN set. Is there a way to write a DQL query which would directly return me User1 and User2? Or do I need to fetch all users to have Doctrine to unserialize roles column and then for each of them do in_array('ROLE_ADMIN', $user-getRoles())? I have searched the DQL part of the manual, but so far did not find anything similar to my needs...

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  • text in textbox shows up as circles instead of regular characters?

    - by BlueMonster
    When i type in either of the textboxes i get little circles appearing instead of text. Why is this happening and how do i stop it? Code is as follows: HTML: <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="MainPage.aspx.cs" Inherits="Foods.MainPage" %> <!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></title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link id="Link1" rel="stylesheet" type="text/css" href="Styles/mainStyle.css"/> </head> <body> <form id="form1" runat="server"> <div class = "userIDTboxDiv"> <div class = "userIDTboxText"> &nbsp;&nbsp;&nbsp; Enter User ID: </div> <asp:TextBox id="userIDBox" TextMode="password" runat="server" Height="52px" Width="200px" /> </div> <div class = "passwordTboxDiv"> <div class = "passwordTboxText"> &nbsp;&nbsp;&nbsp; Enter User Password: </div> <asp:TextBox id="TextBox1" TextMode="password" runat="server" Height="52px" Width="200px" /> </div> </form> </body> CSS: body { text-decoration:none; background: white; } input { margin-left: 0px; margin-top: 7px; } .userIDTboxDiv { padding-top: 20%; padding-left: 45%; width: 15%; height: 30%; } .userIDTboxText { padding-left: 17%; height: auto; width:203px; } .passwordTboxDiv { padding-top: 2%; padding-left: 45%; width: 15%; height: 111px; } .passwordTboxText { padding-left: 10%; height: auto; width:203px; }

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  • Having issues with jquery ui datepicker and IE

    - by Howlingfish
    This works perfectly in Firefox but doesnt work in ie i get the following error "Line: 640 Error: Object doesn't support this property or method" Here is my code <asp:TextBox ID="calendardatedob" CssClass="calendardatedob" runat="server" AccessKey="n" TabIndex="4" MaxLength="40" /><span class="req">*</span> e.g dd/mm/yyyy Here is my jquery $(document).ready(function() { $("#ctl00_PageContent_calendardatedob").datepicker(); }); im referencing these > <script > src="../../assets/js/jquery.min.js" > type="text/javascript"></script> > <script > src="../../assets/js/jquery-ui-1.8.custom.min.js" > type="text/javascript"></script>

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  • Setting breakpoint in c# code with ADPlus

    - by Petr Havlicek
    Hello, I am wondering if it is possible to set a breakpoint in C# code using ADPlus. I find several examples of config files but they always works with native code. Like this one: <ADPlus> <Breakpoints> <NewBP> <!-- Set the breakpoint on ExitProcess. --> <Address>kernel32!ExitProcess</Address> <Type>BP</Type> <Actions>FullDump;Stacks;</Actions> <ReturnAction>G</ReturnAction> </NewBP> </Breakpoints> </ADPlus> Something like this would be useful: <Address>MyCSharpClass.SomeMethod</Address>

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  • Using <style> tags in the <body> with other HTML

    - by Gagan
    <html> <body> <style type="text/css"> p.first {color:blue} p.second {color:green} </style> <p class="first">Hello World</p> <p class="second">Hello World</p> <style type="text/css"> p.first {color:green} p.second {color:blue} </style> <p class="first">Hello World</p> <p class="second">Hello World</p> </body> </html> How is a browser supposed to render css which is non contiguous? Is it supposed to generate some data structure using all the css styles on a page and use that for rendering? Or does it render using style information in the order it sees?

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