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• Emulate back button in multi-view TabActivity

  - by ZelluX

  Hi, all I have a TabActivity with several tabs. Each tab corresponds to a specific view, and those views may further switch to other views. For example, one of my tabs displays RSS feed list, after user clicks one of the RSS feed, it will switch to a view displaying a list of articles, and after user clicks one of the titles, a full article view will be displayed. I'm going to add support for "back" button in my application. For instance, in a full article view, after user presses the "back" button, it should switch back to the article list view. And if user presses it the "back" button again, my application should switch back to the feed list view. My idea is to maintain a Stack<View> during navigation, and every time user presses the "back" button, the program will pop a View out of the stack, and set it as the current view. But I would like to know how to set current view in TabHost. Many thanks.

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• c++ normalizing data sizes across systems

  - by Bocochoco

  I have a struct with three variables: two unsigned ints and an unsigned char. From my understanding, a c++ char is always 1 byte regardless of what operating system it is on. The same can't be said for other datatypes. I am looking for a way to normalize POD's so that when saved into a binary file, the resulting file is readable on any operating system that the code is compiled for. I changed my struct to use a 1-byte alignment by adding #pragma as follows: #pragma pack(push, 1) struct test { int a; } #pragma pack(pop) but that doesn't necessarily mean that int a is exactly 4 bytes on every os, I don't think? Is there a way to ensure that a file saved from my code will always be readable?

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• Latex font color

  - by Pieter

  I'm trying to typeset a document I'm working on. Currently I'm trying to format a piece of text such that the text consists of two colors: a fill color and a line color. In this way the header should pop out more. I found \psset with options such as linecolor and fillcolor, but I can't get it to work. Can someone provide an example of how I could do this? Just providing a color using the color-package is no problem, but also not what I want because using this package I can only provide a single color for a piece of text.

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• How to make a jquery datePicker button image unclickable

  - by Farzana

  I have a jquery UI datePicker in my page. I have a text box on which the date is displayed. The code is: $("#cal").datepicker({ minDate: new Date(), defaultDate: new Date(), buttonImage: '/images/calendar.gif', constrainInput: false, closeText: 'Close', showButtonPanel: true, showButtonText: 'Choose a date', buttonImageOnly : true, showOn : 'button' }); $("#till").datepicker('setDate', today); I want to disable this on some conditions. I use the following code to disable: $("#cal").datePicker('disable'); It blacks out the text box but the image is still clickable. The problem is in IE, the date picker pop up comes up but does not close when the image button associated with the date picker is clicked. I also tried to bind a onclick function with the image to make it non-clickable. But that does not work as well. How can make the date picker image button non-clickable when the date picker is disabled. Any help would be appreciated. Thanks, Farzana

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• Why doesn't splicing an object from an array in Javascript return the array?

  - by Allen Gould

  I have an array of objects (say, a deck of cards): var deck = []; deck.push(new Card(suit, rank)); The following seems to work: var card = deck.pop(); var card = deck.shift(); (pulling from the "top" or "bottom" of the deck respectively) But if I want a card from the middle (say, if this was a hand of cards) var card = deck.splice(2,1); The object doesn't seem to get properly assigned to the variable (everything is undefined). Everything I look up says that splice should return the object that I'm removing - what am I missing?

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• Can't run the ActionBarCompat sample

  - by David Miler

  I am having trouble compiling and running the ActionBarCompat sample of Android 16. I have API level 16 as the build target selected, which seems to build fine, but when I try to debug these errors pop up. Of course I could change the min API level in the manifest, but what would be the point of that? I have made no changes to the sample, so how come it is not working properly? Class requires API level 14 (current min is 3): android.view.ActionProvider SimpleMenuItem.java /ActionBarCompat/src/com/example/android/actionbarcompat line 129 Android Lint Problem Class requires API level 14 (current min is 3): android.view.ActionProvider SimpleMenuItem.java /ActionBarCompat/src/com/example/android/actionbarcompat line 134 Android Lint Problem Class requires API level 14 (current min is 3): android.view.MenuItem.OnActionExpandListener SimpleMenuItem.java /ActionBarCompat/src/com/example/android/actionbarcompat line 155 Android Lint Problem I am thoroughly confused, any help would be appreciated.

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• Is it possible to prevent iPhone/iPad orientation changing in the browser?

  - by BoomShaka

  I've seen similar questions on this issue, but they are related to native apps. I build web apps for the iPhone/iPad that run in the browser (Safari). I was wondering if there is a way to prevent orientation change in the browser, perhaps via some meta tag. I know of the viewport meta tag which allows you to specify scale and zooming capabilities, so figured maybe there is something similar for orientation. I doubt it is possible, but I thought I'd just pop a question on here to see.

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• What is necessary to run JavaScript files from MS Server 2003?

  - by Daniel

  I have created some JavaScript files and they run well from my Mac OS X Server. Now I have put the same JavaScript files on my MS Server 2003. But they don't work. Do I have to install something on the server in order to get them work? EDIT: (Sorry, I'm new and English is not my native language, so its hard for me to describe the situation well) I have downloaded this free Ajax Chat app. After enabling PHP on my Mac, it worked. But on my MS Windows 2003 Server it doesn't work. I installed PHP and Apache on Windows. PHP and Apache work well. But everything that uses JavaScript (such as drop down menus or pop-up windows) doesn't work. Thanks!

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• Figuring out what makes a C++ class abstract in VS2008

  - by suszterpatt

  I'm using VS2008 to build a plain old C++ program (not C++/CLI). I have an abstract base class and a non-abstract derived class, and building this: Base* obj; obj = new Derived(); fails with the error "'Derived': cannot instantiate abstract class". (It may be worth noting, however, that if I hover over Base with the cursor, VS will pop up a tooltip saying "class Base abstract", but hovering over Derived will only say "class Derived" (no "abstract")). The definitions of these classes are fairly large and I'd like to avoid manually checking if each method has been overridden. Can VS do this for me somehow? Any general tips on pinpointing the exact parts of the class' definition that make it abstract?

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• onPageLoad is not working properly in Firefox Extension Development

  - by Tharaka Deshan

  I am new to Firefox Extension Development and doing my 1st program. Simply I needed to pop up a alert once it loaded the page. My code was like this: var myExtension = { init: function() { if(gBrowser) gBrowser.addEventListener("DOMContentLoaded", this.onPageLoad, false); }, onPageLoad: function(aEvent) { alert("Loaded"); } } window.addEventListener("load", function load(event){ window.removeEventListener("load", load, false); myExtension.init(); },false); But I am getting the alert box for couple of times. Then I found about "#document" and then I added a IF condition: onPageLoad: function(aEvent) { if (aEvent.originalTarget.nodeName == '#document') { alert("Loaded"); } } Unfortunately still I am getting the same. Please advise me on this.

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• cannot convert ‘mcontext_t*’ to ‘sigcontext*’ in assignment

  - by user353573

  i have checked asm/ucontext.h it should be sigcontext, but why pop up the error message cannot convert ‘mcontext_t*’ to ‘sigcontext*’ in assignment #include <stdio.h> #include <signal.h> #include <asm/ucontext.h> static unsigned long target; void handler(int signum, siginfo_t *siginfo, void *uc0){ struct ucontext *uc; struct sigcontext *sc; uc = (struct ucontext *)uc0; sc = &uc->uc_mcontext; sc->eip = target; } struct ucontext { unsigned long uc_flags; struct ucontext *uc_link; stack_t uc_stack; struct sigcontext uc_mcontext; sigset_t uc_sigmask; /* mask last for extensibility */ };

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• Finding out the version of Dojo

  - by Sandeep

  I'm kinda new to Dojo toolkit. There are certain issues which I would like to get enlightened (I googled but I didn't get any appropriate & satisfying answers) I have a dojo.js(Perhaps the uncompressed dojo.js downloaded) in my already running application (Developed by another software developer). How to find out which version of dojo.js he has downloaded and is being used right now? (Its not commented. I checked) a) While I'm trying to run my application in IE-8 (Opening a pop-up on click of a button), I get error which is pointing me to this line of code if(dojo.isIE&&window.location.protocol==="file:") Note: Its working fine in IE6 but the issue is with IE8 & to be even more specific the JS error is displayed only for the first time when I'm clicking the button. b) Is it true that dojo 1.3 & above is the best & stable release for IE8?

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• What's the simplest way to let the user download a file in ASP.NET MVC ?

  - by drasto

  In an ASP.NET MVC I have a database table. I want to have a button on some view page, if some user clicks that button I my application will generate XML file containing all rows in the database. Then the file containing XML should be sent to the client so that the user will see a download pop-up window. Similarly I want to allow user to upload an XML file whose content will be added to the database. What's the simplest way to let the user upload and download file ? Thanks for all the answers

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• How do I change the window that appears when I insert my pen drive?

  - by NeoHaxxor

  Basically all that has to be said has been said in the title. How do I make a window other than the default one pop up when I insert my pen drive into my PC? Can it come from a program in the USB itself as well? Not doing any actual coding yet. Btw- if that default window with al the options has a special name plz tell me. Just so I can word my Google searches better. Any help would be appreciated. Thx

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• Python. Strange class attributes behavior

  - by Eugene

  >>> class Abcd: ... a = '' ... menu = ['a', 'b', 'c'] ... >>> a = Abcd() >>> b = Abcd() >>> a.a = 'a' >>> b.a = 'b' >>> a.a 'a' >>> b.a 'b' It's all correct and each object has own 'a', but... >>> a.menu.pop() 'c' >>> a.menu ['a', 'b'] >>> b.menu ['a', 'b'] How could this happen? And how to use list as class attribute?

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• Avoiding try/catch hell in my web pages

  - by Shaun_web

  I am writing an ASP.NET website, which is a new framework for me. I find that I have a try/catch block in literally every method of my codebehind. All these try/catch blocks do is catch the exception and then pop-up an error message to the user. Isn't there some sort of global error handler in ASP.NET? It's worth noting that my error handling is within control (ASCX) pages, and I would like a way to simply get each ASCX to handle its own errors without forcing all error handling just to a single master page or a redirect...

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• Hiding iAds when loading?

  - by Jesper Mansa

  I'm trying to make an ios app with an iAd in the bottom but lifted a little bit. It actually woks ok but when the iAd is loading it shows an white area just below where the iAd should be. When its done loading the iAd jumps up in the right position. I think normaly the button is loaded outside the screen and nthen pop ups when done but because mine add is liftet a little I can see the loading area... Is there a way to make the iAd load in the sides instead and then popin from the side? Here is what I have so far: frame.origin.x = ( _screenWidth - frame.size.width ) / 2; if( calculateForBannerOnBottom ) frame.origin.y = _screenHeight - (frame.size.height/1.2); else frame.origin.y = -_adView.frame.size.height+(frame.size.height/2.4); Hoping 4 help and thanks in advance :-)

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• Should downcasting be avoided while using a class hierarchy in C++?

  - by neuviemeporte

  Let's say I'm writing an application which works with projects, and exposes different functionality depending on the type of the project. I have a hierarchy of classes for the different types of projects: class AbstractProject { }; class ProjectA : public AbstractProject { }; class ProjectB : public AbstractProject { }; class ProjectC : public AbstractProject { }; Now, I was planning to have an AbstractProject *_currentProject pointer as a member in the application's main class, pop up a dialog box on startup and based on the selection, do: _currentProject = new ProjectB(); // e.g. Later, I'll have to downcast the pointer to the specific type to utilize the functionality specific to different Project-s. Somehow this makes me feel uneasy. Is there a Better Way of doing this?

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• How do IOS know which viewController is being viewed and hence need viewWillAppear to be called

  - by Jim Thio

  How does iOs know? Does each view has a pointer to it's controller? What happened? When we pop a viewController from navigation, does the navigationController arrange which view should be called? For example: If I added: [[BNUtilitiesQuick window] addSubview:[BNUtilitiesQuick searchController].view]; viewWillAppear will be called. However, window doesn't know the viewController. I am passing the view outlet of the controller not the controller. How can iOs 5 knows that it has to call [[BNUtilitiesQuick searchController] viewWillAppear:YES]

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• design function: underlying structure to store list of results for print to file

  - by forest.peterson

  is this a good approach to print a list of items to csv file with a sublist attached to each item. The gist of the function is when an item is found that does not exactly macth then a list of close matches is generated - this works now writing out one list at a time to a command window. For export to a csv file I think all the lists must be generated, stored and then written at once. Right now I use a struct to store the attributes printed, each struct is an item on the list - these structs are then added to a sorted stack and when printed they pop off into write out. Is a stack of stacks of structs a good design?

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• javacript question related to use of ' and "

  - by vatismarty

  my_window.document.write(' function redirect(linkid) { opener.location.href=linkid; window.close(); } Hello Thank you.If you accidentally closed our website click here to go back to our website '); This is my piece of code to close a already opened pop up window by redirecting it to google.com. I think there is some problem with matching the apostrophes ' and "... how to code with (' (" (' ') ") ')... is this correct... please help me with this.

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• [as3] air for android - stage.setOrientation deprecated in AIR 2.5 so how do I do it now?

  - by jason

  as3 air for android using flash CS5 my problem: testing an AIR app on my droid 2 global (with slide out keyboard) using stage.addEventListener(StageOrientationEvent.ORIENTATION_CHANGE, handleOrientationChange); this is only fired when the i slide the keyboard out and not when I rotate the phone. I have tried this with the auto orientation on and off and with the aspect to portrait and landscape. actually the auto orientation option does not seem to make a difference on or off. I need the orientation to change when i rotate the phone. I know i can use the accelerometer to do this but the problem with that is when I click on a textField with the keyboard closed only the vertical keyboard pops up and i need the other one to pop up when holding the phone sideways.

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• Copy method optimization in compilers

  - by Dženan

  Hi All! I have the following code: void Stack::operator =(Stack &rhs) { //do the actual copying } Stack::Stack(Stack &rhs) //copy-constructor { top=NULL; //initialize this as an empty stack (which it is) *this=rhs; //invoke assignment operator } Stack& Stack::CopyStack() { return *this; //this statement will invoke copy contructor } It is being used like this: unsigned Stack::count() { unsigned c=0; Stack copy=CopyStack(); while (!copy.empty()) { copy.pop(); c++; } return c; } Removing reference symbol from declaration of CopyStack (returning a copy instead of reference) makes no difference in visual studio 2008 (with respect to number of times copying is invoked). I guess it gets optimized away - normally it should first make a copy for the return value, then call assignment operator once more to assign it to variable sc. What is your experience with this sort of optimization in different compilers? Regards, Dženan

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• iphone dev - loading table content asynchronously

  - by Brian

  My app has a navigation controller which push and pop a series of views. One of the tableViews loads .xml file from URL and it takes 4-5 seconds. If I click the back button on the navigation bar, it will only respond after the content of the table finish loading. Is there an easy way to load the content asynchronously so that the app will still respond to my gesture on the navigation bar? p.s. I search this on the Internet and people are talking about multithreading. I don't know a lot about threads so please be more specific. Thanks in advanced =)

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• Jquery function calls more than one time.

  - by Harie

  I am having an aspx page in which I am calling a user control. The user control I am using a pop up to display it when a user clicks a asp:linkbutton. In that user control I am having a textbox and I am calling a Jquery Blur to do some validation. While doing so the function is calling [blur] is calling twice. I just called an alert() with the textbox value.So I can see the alert is coming twice .What I need to do to avoid the second time. I need to do it only whenever the user going out of the textbox and that also one time. $('#<%=txtCategory.ClientID %>').blur(function() { alert($(this).val()); }); This is called twice.Thanks for ur response.

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