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Retrieve a Fragment from a ViewPager

...ll no longer work. What about this solution, overriding instantiateItem() and destroyItem() of your Fragment(State)PagerAdapter: public class MyPagerAdapter extends FragmentStatePagerAdapter { SparseArray<Fragment> registeredFragments = new SparseArray<Fragment>(); public MyPa...
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How to use NSCache

... into account: // Your cache should have a lifetime beyond the method or handful of methods // that use it. For example, you could make it a field of your application // delegate, or of your view controller, or something like that. Up to you. NSCache *myCache = ...; NSAssert(myCache != nil, @"cache...
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B-Tree vs Hash Table

In MySQL, an index type is a b-tree, and access an element in a b-tree is in logarithmic amortized time O(log(n)) . 5 Answ...
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How to concatenate two MP4 files using FFmpeg?

...ess hence why I chose ffmpeg. I'm converting the two files into .ts files and then concatenating them and then trying to encode that concated .ts file. The files are h264 and aac encoded and I'm hoping to keep the quality the same or as close to original as possible. ...
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Should IBOutlets be strong or weak under ARC?

...veloping exclusively for iOS 5 using ARC. Should IBOutlet s to UIView s (and subclasses) be strong or weak ? 11 Answer...
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How to disable / enable dialog negative positive buttons?

...e look at the custom dialog below. I have an edittext field on the dialog and if the text field is empty I would like to disable the positiveButton . I can get a charListener for the text field but I am not sure how I am going to set the positivebutton to disable or enable from that listener? Wh...
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Using async-await on .net 4

... lot from C# 5's async-await feature. But I'm not sure which version of VS and of the async runtime to use. 5 Answers ...
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How can I get the version defined in setup.py (setuptools) in my package?

...o have thought you were asking), put the version string in a separate file and read that file's contents in setup.py. You could make a version.py in your package with a __version__ line, then read it from setup.py using execfile('mypackage/version.py'), so that it sets __version__ in the setup.py n...
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What is a semaphore?

...t should let the guests go in sequentially, but when i tried it out, it's random. Eg. Guest 40 came in first before Guest 39. Is there anything we could do to control this? – TNA May 31 '14 at 9:12 ...
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What is the difference between save and export in Docker?

I am playing around with Docker for a couple of days and I already made some images (which was really fun!). Now I want to persist my work and came to the save and export commands, but I don't fully understand them. ...