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• Put text input inside label for radio button?

  - by Martijn

  I'm trying to make a radio group specifying a bunch of options, and an extra option "other" with a text input to specify. The code for this particular radio button I'm using is <input type='radio' name='RadioInput' value='Other' id='RadioInput_Other' /> <label for='RadioInput_Other'>Ohter: <input type='text' name='RadioInput_Other_Value' id='RadioInput_Other_Value' value='' /> </label> The idea is that if you give focus to the text input, the radio button corresponding to it is selected. The code above almost does this (since the text input is inside the label). However, it also shifts focus to the radio button (which is annoying, since whatever you type next is lost). Is there any way to prevent this using XHTML1.0 / CSS2? Preferably without using javascript.

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• Dynamically allocated structure and casting.

  - by Simone Margaritelli

  Let's say I have a first structure like this: typedef struct { int ivalue; char cvalue; } Foo; And a second one: typedef struct { int ivalue; char cvalue; unsigned char some_data_block[0xFF]; } Bar; Now let's say I do the following: Foo *pfoo; Bar *pbar; pbar = new Bar; pfoo = (Foo *)pbar; delete pfoo; Now, when I call the delete operator, how much memory does it free? sizeof(int) + sizeof(char) Or sizeof(int) + sizeof(char) + sizeof(char) * 0xFF ? And if it's the first case due to the casting, is there any way to prevent this memory leak from happening? Note: please don't answer "use C++ polymorphism" or similar, I am using this method for a reason.

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• C++ Template Classes Circular Dependency Problem

  - by TomWij

  We have two classes: template<typename T, typename Size, typename Stack, typename Sparse> class Matrix and template<typename T, typename Size> class Iterator Matrix should be able to return begin and end iterators and Iterator will keep a referrence to the Matrix to access the elements via it's interface. We don't want Iterator to depend on the internal storage of the Matrix to prevent coupling. How can we solve this cyclic dependency problem? (The internal Storage class has the same template parameters as the Matrix class and the same access procedures as the Matrix itself)

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• Naming a typedef for a boost::shared_ptr<const Foo>

  - by Blair Zajac

  Silly question, but say you have class Foo: class Foo { public: typedef boost::shared_ptr<Foo> RcPtr; void non_const_method() {} void const_method() const {} }; Having a const Foo::RcPtr doesn't prevent non-const methods from being invoked on the class, the following will compile: #include <boost/shared_ptr.hpp> int main() { const Foo::RcPtr const_foo_ptr(new Foo); const_foo_ptr->non_const_method(); const_foo_ptr->const_method(); return 0; } But naming a typedef ConstRcPtr implies, to me, that the typedef would be typedef const boost::shared_ptr<Foo> ConstRcPtr; which is not what I'm interested in. An odder name, but maybe more accurate, is RcPtrConst: typedef boost::shared_ptr<const Foo> RcPtrConst; However, Googling for RcPtrConst gets zero hits, so people don't use this as a typedef name :) Does anyone have any other suggestions?

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• Is there Java counterpart for Aspnet 4's <%: %> XSS prevention?

  - by Tomas Tintera

  I'm developer moving from C# to Java. Heard about new ASP net feature. <%: %. It renders object with html encoding. Only these impolementing IHtmlString interface are not encoded (to prevent double encoding). See more in http://weblogs.asp.net/scottgu/archive/2010/04/06/new-lt-gt-syntax-for-html-encoding-output-in-asp-net-4-and-asp-net-mvc-2.aspx Is such cute tool in Java side? I mean a way to output a string to webpage and (not)encode it based on it's type.

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• .NET Regular Expression to split multiple words or phrases

  - by Cj Anderson

  I'm using the code below to take a string and split it up into an array. It will take: Disney Land and make it two separate elements. If the string contains "Disney Land" then it is one element in the array. Works great, however it adds some empty elements to the array each time. So I just iterate over the elements and remove them if they are empty. Is there a tweak to the code below that will prevent those empty elements from occurring? Private m_Reg As Regex m_Reg = New Regex("([^""^\s]+)\s*|""([^""]+)""\s*") Dim rezsplit = m_Reg.Split(criteria)

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• Joomla template parameters and params.ini - file becomes unwritable after save.

  - by Moak

  I am using wamp and creating a Joomla template with changeable parameters. initially the message is The parameter file \templates\ssc_2010\params.ini is writable! once I make changes everything works as expected, except now i get the message: The parameter file \templates\ssc_2010\params.ini is unwritable! One solution is to brows to the directory, right click the file, select properties, and uncheck read-only. Again the file is writable but once I modify the parameters again it becomes read only again. I'm quite lazy and would like to prevent this from happening again, I've notice this happening in past projects, but now I have to work a lot with parameters so it becomes quite boring doing manual labor like that :P

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• Return a dynamic string from std::exception's `what`

  - by Shtééf

  I'm convinced at this point that I should be creating subclasses of std::exception for all my exception throwing needs. Now I'm looking at how to override the what method. The situation that I'm facing, it would be really handy if the string what returns be dynamic. Some pieces of code parse an XML file for example, and adding a position or line number to the error message is useful to me. What I'd like to know: what returns a const char *, which implies any catcher is likely not going to free the string. So I need some other place to store the result, but where would that be? (I need thread-safety.) what also includes throw() in its signature. While I can prevent my what from throwing anything, it seems to me that this method really isn't intended for anything too dynamic. If what is not the right place, then where should I be doing this instead?

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• Double encoded url being fully decoded in ASP.NET

  - by Brad R

  I have just come across something that is quite strange and yet I haven't found any mention on the interwebs of others having the same problem. If I hit my ASP.NET application with a double encoded url then the Request["myQueryParam"] will do a double decode of the query for me. This is not desirable as I have double encoded my query string for a good reason. Can others confirm I'm not doing something obviously wrong, and why this would happen. A solution to prevent it, without doing some nasty query string parsing, would be great too! As an example if you hit the url: http://localhost/MyApp?originalUrl=http%3a%2f%2flocalhost%2fAction%2fRedirect%3fUrl%3d%252fsomeUrl%253futm_medium%253dabc%2526utm_source%253dabc%2526utm_campaign%253dabc (For reference %25 is the % symbol) Then look at the Request["originalUrl"] (page or controller) the string returned is: http://localhost/Action/Redirect?Url=/someUrl?utm_medium=abc&utm_source=abc&utm_campaign=abc I would expect: http://localhost/Action/Redirect?Url=%2fsomeUrl%3futm_medium%3dabc%26utm_source%3dabc%26utm_campaign%3dabc I have also checked in Fiddler and the URL is being passed to the server correctly (one possible culprit could have been the browser decoding the URL before sending).

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• loading HTML fragments with jQuery

  - by sam

  Hi everybody, I'm very new to jQuery, Ajax and things like these. I've found solutions on how to inject HTML fragments into my site: $(document).ready(function(){ $('a').click(openContent); //binding all anchors to this function }); function openContent(){ var path = $(this).attr('href'); $('#content').load(path); return false; //to prevent browser from loading the single HTML fragment } That works really fine! The problem is, these function won't be executed when clicking on anchors located in the new HTML fragment which were injected right before. So the fragment won't get injected into div, the browser will only load the fragment for itself. Hope there are solutions which aren't that tricky... thanks sam

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• Stretch column table in Primefaces

  - by Orange91

  How I can prevent to stretch table when I input long text: Screen: http://zapodaj.net/71821572f2445.jpg.html Meyby is it possible to make the text lines stretched row horizontally? My fragment example table: <p:dataTable id="table" styleClass="table" value="#{userMB.allInactive}" var="inactive" paginator="true" rows="15" rowKey="#{inactive.id}" selection="#{userMB.user}" selectionMode="single" > <f:facet name="header"> Lista kont nieaktywnych </f:facet> <p:column headerText="#{msg.firstName}"> <h:outputText value="#{inactive.firstName}" /> </p:column> I tried <p:column headerText="#{msg.firstName}" width="20px"> styleClass for column: <p:column styleClass="column" headerText="#{msg.firstName}" width="20px"> .column { width: 20px; } but I do not see any change, it does not work.

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• Potential for SQL injection here?

  - by Matt Greer

  This may be a really dumb question but I figure why not... I am using RIA Services with Entity Framework as the back end. I have some places in my app where I accept user input and directly ask RIA Services (and in turn EF and in turn my database) questions using their data. Do any of these layers help prevent security issues or should I scrub my data myself? For example, whenever a new user registers with the app, I call this method: [Query] public IEnumerable<EmailVerificationResult> VerifyUserWithEmailToken(string token) { using (UserService userService = new UserService()) { // token came straight from the user, am I in trouble here passing it directly into // my DomainService, should I verify the data here (or in UserService)? User user = userService.GetUserByEmailVerificationToken(token); ... } } (and whether I should be rolling my own user verification system is another issue altogether, we are in the process of adopting MS's membership framework. I'm more interested in sql injection and RIA services in general)

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• How do I stop image spam from being uploaded to my (future) site?

  - by Pete Lacey

  I have in mind an idea for a generally accessible site that needs to allow images to be uploaded. But I'm stymied on how to prevent image spam: porn, ads in image form, etc. Assumptions: I'm assuming that the spammers are clever, even human. I'm skeptical of the efficacy of image analysis software. I do not have the resources to approve all uploads manually. I am willing to spend money on the solution -- within reason. This site will be location-aware, if that helps. How does Flickr do it or imgur? Or do they?

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• Scope of object properties & methods

  - by Anish

  In the article Show love to the object literal, it's said: When we have several scripts in a page, the global variables & functions will get overwritten if their name repeats. One solution is to make the variables as properties & functions as methods of an object, and access them via the object name. But will this prevent the issue of variables getting into the global namespace? <script> var movie = { name: "a", trailer: function(){ //code } }; </script> In the above code which elements gets added to the global namespace? a) Just the object name - movie b) Object name as well as the properties and methods inside it – movie, movie.name, movie.trailer()

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• Disabling itemrenderer Hovered state

  - by duder

  My itemrenderer has 2 custom states, no hovered state, and no normal state <s:states> <s:State name="state1" /> <s:State name="state2" /> </s:states> When I initialize it, I force it to go to state2. The problem is that when it's hovered over, it relapses back to the first state state1. It's kind of weird since I don't really have a hovered state. Anyone knows how to prevent this from happening? maybe by somehow disabling the hover effect?

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• How to catch HttpAntiForgeryException in ASP.NET MVC

  - by megalonychidae

  I'm using the AntiForgeryToken in my ASP.NET MVC forms. If I deactivate cookies in my browser and send the from, I'd get following error message: A required anti-forgery token was not supplied or was invalid. How can I prevent this message from showing? I would prefer redirecting the user to another page. I've activated customErrors and included this HandleError in my controller: [HandleError(ExceptionType=typeof(HttpAntiForgeryException), View="Index")] public class MyController : Controller { ... } The HandleError is ignored. Has anyone got a solution?

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• How to pass data to another droid device when the other device isn't expecting it

  - by James Black

  I am working on an application and one feature that would make it really useful is the ability to share some information, but the other device may not be expecting the data to be sent. For example, if I am reading a really good book, and I realize that a friend may like it, I could use an application to send the data to him, so he could order the book from Amazon. But, since he isn't expecting the data, I would hate for the application to be polling a server every so often, as that will be needlessly draining the battery. Ideally it would be great if there was a way to make a phone call to the target device, send a data packet and end the call. If it could be done and prevent the phone from ringing, then it would be very useful to me. I am curious if there is some way to send data between devices without polling.

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• iPhone TabBar selection cancelling

  - by Chris Schnyder

  I am developing an iPhone app that displays several views, all acessed via Tab Bar items. However I need to add an additional item to the Tab Bar that simply launches a URL in Safari. I've accomplished this by adding an empty placeholder view to the TabBar and returning FALSE from shouldSelectViewController when the this view's tabBarItem is clicked on, and launching Safari at the same time. That code is: - (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController { if([[viewController tabBarItem] title] == "Website"){ //... launch Safari return FALSE; } else { return TRUE; } } PROBLEM: If the TabBar has too many items, and this "Safari Launch" tab is pushed off to the "More" navigation controller, I lose the capability to intercept the event and prevent the view from loading when clicked. Any suggested tips?

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• Video with QML Video plays choppy on Mac OS X

  - by avida

  I’m trying to create simple video player with QML. I have QtSdk installed and QtMobility compiled and installed from source. Then I put this simple video playing code to main qml file: import QtQuick 1.0 import QtMultimediaKit 1.1 Item{ width: 400; height: 300 Video { id: video source: "d:/Projects/Serenity - HD DVD Trailer.mp4" anchors.fill: parent MouseArea { anchors.fill: parent onClicked: { video.play() } } } } After compiling and running application, video plays choppy and on exiting application it puts this in log: 2011-06-07 11:13:44.055 video-player[323:903] *** __NSAutoreleaseNoPool(): Object 0x10225ea60 of class NSCFNumber autoreleased with no pool in place - just leaking 2011-06-07 11:13:45.007 video-player[323:903] *** __NSAutoreleaseNoPool(): Object 0x10264f030 of class __NSCFDate autoreleased with no pool in place - just leaking 2011-06-07 11:13:45.007 video-player[323:903] *** __NSAutoreleaseNoPool(): Object 0x11a409000 of class NSCFTimer autoreleased with no pool in place - just leaking 2011-06-07 11:13:45.008 video-player[323:903] *** __NSAutoreleaseNoPool(): Object 0x11a43e550 of class NSCFArray autoreleased with no pool in place - just leaking 2011-06-07 11:13:45.008 video-player[323:903] *** __NSAutoreleaseNoPool(): Object 0x11a462560 of class __NSFastEnumerationEnumerator autoreleased with no pool in place - just leaking If any way to make it playing smoothly and to prevent memory?

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• Importing large datasets on iPhone using CoreData

  - by Matthes

  Hi there, I'm facing very annoying problem. My iPhone app is loading it's data from a network server. Data are sent as plist and when parsed, it neeeds to be stored to SQLite db using CoreData. Issue is that in some cases those datasets are too big (5000+ records) and import takes way too long. More on that, when iPhone tries to suspend the screen, Watchdog kills the app because it's still processing the import and does not respond up to 5 seconds, so import is never finished. I used all recommended techniques according to article "Efficiently Importing Data" http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Conceptual/CoreData/Articles/cdImporting.html and other docs concerning this, but it's still awfully slow. Solution I'm looking for is to let app suspend, but let import run in behind (better one) or to prevent attempts to suspend the app at all. Or any better idea is welcomed too. Any tips on how to overcome these issues are highly appreciated! Thanks

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• Partition of tables in MySQL

  - by Joel

  Hello, I have read that in a case where a table has many columns, but most of the time only one of them is used (say a title column in a forum post), a way to increase performance would be a partition to two tables, where one will contain only the title and the other one will contain the other columns (such as the forum post body). However, in case I use select ForumTitle from Forum; won't that be good enough to prevent the load of all columns (such as the forum post's body) to the memory, and eliminate the need of partition? Thanks, Joel

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• Convert PDF to PDF/A-1

  - by AZtec

  I know this probably is not strictly a programming-question (well maybe it is, i don't know) but i'm having serious problems trying to convert a regular pdf (with hyperlinks, bookmarks, images, embedded fonts etc.) into a PDF/A-1 format. I get all kinds of errors when i check it with pdfaPilot. How can i prepare a pdf so no problems will occur when i try to convert to PDF/A-1. Most problems can be fixed with pdfaPilot but apparently not all. One of the problems i get is with the XMP Metadata which are "not properly defined". Wat exactly does this mean, and can i do something to prevent this. Another one is: "Syntax problem: Array with more than 8191 elements" (i hope this one is solvable) I hope someone can help me out here, since i'm in a tight spot right now with deadlines that are killing me.

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• Programmer Health - how to avoid going blind and sick!

  - by stefanyko

  Hi All! this is my very first time here! so nice to meet you guys! ;-) When i was starting with this job, ( when i have chosed of doing this for the rest of my life) i have thinked also, one day, before or after, i would become blind or at least sick by drinking 5 or more coffee per day and of course by sitting down on my pc for hours!!! ;-\ From many years now, i'm asking myself how my eyes can stay in front o the monitor for so many hours per day!? well now i'm to a point of no return!!! i feel my eyes each day more tired, and my productivity is waning, but i can't change work now and i don't want do this!!!! what i need to do for prevent this to become a more serious problem for me and for my eyes!? any suggestion will be really appreciated!!! Thanks!

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• How to restrict access to my web service?

  - by Hank

  I have http://example.com/index.html, which from within the HTML uses JavaScript to call a web services at http://example.com/json/?a=...&b=... The web service returns to index.html a JSON array of information to then be displayed on index.html. Since anyone can view the source code for index.html and see how I'm calling the JSON web services (http://example.com/json/), how do I prevent people from calling my JSON web service directly? Since the web service is essentially an open read into my database, I don't want people to abuse the web service and start DoS my server, fetching more information than they should, etc..

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• MOD Rewrite Mask for Image URL

  - by user345426

  Okay so I am launching a cloned e-commerce site. I want to create a rewrite rule for the image folder for the second site to fetch images from the first site. RewriteRule ^alice.gif$ www.rhinomart.com/images/h_home.gif When I go to alice.gif directly through the browser it simply redirects me to the rhinomart.com URL and image. How do I prevent the redirect from occurring? When I go to http://www.acnbiz.net/alice.gif it should fetch alice.gif directly from Rhinomart.com/images and not redirect. is it possible???

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