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What are the differences between a UIView and a CALayer?

...ll often need to access the underlying layers for a UIView when performing more complex animations than the base UIView class allows. UIView's animation capabilities have grown as the iOS SDK has matured, but there are still a few things that are best done by interacting with the underlying CALayer...
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How do malloc() and free() work?

... OK some answers about malloc were already posted. The more interesting part is how free works (and in this direction, malloc too can be understood better). In many malloc/free implementations, free does normally not return the memory to the operating system (or at least only in...
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Get protocol, domain, and port from URL

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Good ways to sort a queryset? - Django

... Is this more efficient than Author.objects.order_by('-score', 'last_name')[:30]? – Brian Luft Mar 10 '10 at 0:45 ...
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How can I remove all text after a character in bash?

...wered Nov 12 '10 at 19:41 Eldad MorEldad Mor 4,49733 gold badges3030 silver badges4545 bronze badges ...
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Uppercase or lowercase doctype?

...x. While the syntax is inspired by SGML, it is being defined in a way that more closely resembles the way browsers actually handle HTML in the real world, particularly in regards to error handling.” – Mathias Bynens Jun 11 '12 at 6:05 ...
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Are (non-void) self-closing tags valid in HTML5?

...including it serves no practical purpose. It is only there to make it look more like XML for people who can't get out of the habit. – Quentin Oct 23 '14 at 15:51 6 ...
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Why does i = i + i give me 0?

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Stacking Divs from Bottom to Top

... A more modern answer to this would be to use flexbox. As with many other modern features, they won't work in legacy browsers, so unless you're ready to ditch support for browsers from the IE8-9 era you will need to look for an...
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Need a good hex editor for Linux [closed]

...or rescue files/partitions by hand. ) You can delete/insert bytes to file, more than once, without creating temp file. DHEX is a more than just another hex editor: It includes a diff mode, which can be used to easily and conveniently compare two binary files. Since it is based on ncurses and is th...