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How to determine when Fragment becomes visible in ViewPager

... Thanks to today's Android Support Library update (rev 11), the user visible hint issue is finally fixed. It's now safe to use user visible hint for ViewPager. – Oasis Feng Nov 14 '12 at 3:05 ...
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Why are C character literals ints instead of chars?

...ar) == 1 . This makes intuitive sense, since 'a' is a character literal, and sizeof(char) == 1 as defined by the standard. ...
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Maximum size of a element

I'm working with a canvas element with a height of 600 to 1000 pixels and a width of several tens or hundreds of thousands of pixels. However, after a certain number of pixels (obviously unknown), the canvas no longer display shapes I draw with JS. ...
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Cache Invalidation — Is there a General Solution?

...'s control. If you have an idempotent function from a, b to c where, if a and b are the same then c is the same but the cost of checking b is high then you either: accept that you sometime operate with out of date information and do not always check b do your level best to make checking b as fast...
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Find and replace - Add carriage return OR Newline

... Make sure "Use: Regular expressions" is selected in the Find and Replace dialog: Note that for Visual Studio 2010, this doesn't work in the Visual Studio Productivity Power Tools' "Quick Find" extension (as of the July 2011 update); instead, you'll need to use the full Find and Repl...
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RSpec: describe, context, feature, scenario?

... context , feature , scenario : What is the difference(s) among the four and when do I use each one? 3 Answers ...
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How do I stop Entity Framework from trying to save/insert child objects?

...tegrity problems. How do I force EF to only save the entity I want to save and therefore ignore all child objects? 11 Answe...
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What is a patch in git version control?

I am new to both git and version control so I am trying to figure out what a patch is and how is it different from the rest of activities I do in git? ...
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C# - What does the Assert() method do? Is it still useful?

I am debugging with breakpoints and I realize the assert call? I thought it was only for unit tests. What does it do more than breakpoint? Since I can breakpoint, why should I use Assert? ...
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What is a None value?

I have been studying Python, and I read a chapter which describes the None value, but unfortunately this book isn't very clear at some points. I thought that I would find the answer to my question, if I share it there. ...