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Get the current displaying UIViewController on the screen in AppDelegate.m

The current UIViewController on the screen need to response to push-notifications from APNs, by setting some badge views. But how could I get the UIViewController in method application:didReceiveRemoteNotification : of AppDelegate.m ? ...
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What is the main difference between Inheritance and Polymorphism?

I was presented with this question in an end of module open book exam today and found myself lost. I was reading Head first Java and both definitions seemed to be exactly the same. I was just wondering what the MAIN difference was for my own piece of mind. I know there are a number of similar quest...
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Difference between float and decimal data type

...ql> create table numbers (a decimal(10,2), b float); mysql> insert into numbers values (100, 100); mysql> select @a := (a/3), @b := (b/3), @a * 3, @b * 3 from numbers \G *************************** 1. row *************************** @a := (a/3): 33.333333333 @b := (b/3): 33.333333333333...
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Can I find events bound on an element with jQuery?

... In modern versions of jQuery, you would use the $._data method to find any events attached by jQuery to the element in question. Note, this is an internal-use only method: // Bind up a couple of event handlers $("#foo").on({ click: function(){ alert("Hello") }, mouseout: functio...
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How to change the text of a button in jQuery?

How do you change the text value of a button in jQuery? Currently, my button has 'Add' as its text value, and upon being clicked I want it to change to 'Save'. I have tried this method below, but so far without success: ...
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How Do I Convert an Integer to a String in Excel VBA?

How do I convert the integer value "45" into the string value "45" in Excel VBA? 10 Answers ...
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Remove Object from Array using JavaScript

How can I remove an object from an array? I wish to remove the object that includes name Kristian from someArray . For example: ...
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How to do error logging in CodeIgniter (PHP)

...r logs Use log_message('error', 'Some variable did not contain a value.'); To send an email you need to extend the core CI_Exceptions class method log_exceptions(). You can do this yourself or use this. More info on extending the core here See http://www.codeigniter.com/user_guide/general/errors.h...
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How to start two threads at “exactly” the same time

... To start the threads at exactly the same time (at least as good as possible), you can use a CyclicBarrier: // We want to start just 2 threads at the same time, but let's control that // timing from the main thread. That's w...
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Dynamically changing font size of UILabel

...numberOfLines = 1; factLabel.minimumFontSize = 8; factLabel.adjustsFontSizeToFitWidth = YES; The above code will adjust your text's font size down to (for example) 8 trying to fit your text within the label. numberOfLines = 1 is mandatory. Multiple lines: For numberOfLines > 1 there is a met...