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Best way to check if UITableViewCell is completely visible

I have a UITableView with cells of different heights and I need to know when they are completely visible or not. 10 Answe...
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How do I know the current width of system scrollbar?

As you know, one can customize the width of the scrollbar width in Display Properties -> Appearance -> Advanced -> Item: ScrollBar. The default value is 17. However, I can't assume this is always the case, is it possible for me to retrieve this value? ...
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Why does an overridden function in the derived class hide other overloads of the base class?

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Why did Bootstrap 3 switch to box-sizing: border-box?

I'm migrating my Bootstrap themes from v2.3.2 to v3.0.0 and one thing I noticed is that a lot of dimensions are calculated differently, due to the following styles in bootstrap.css. ...
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GCD to perform task in main thread

I have a callback which might come from any thread. When I get this callback, then I would like to perform a certain task on the main thread. ...
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Homebrew: List only installed top level formulas

I'm looking for a way to show only the formulas I installed without the installed dependencies. I want to have a list of all the programs I actually installed, without all noise of the dependencies. ...
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Is it okay to use now?

I'm working on a mobile phone web app and I have several text fields that could benefit from <input type="tel"/> . iPhones will adjust the keyboard for the user, but I'm worried about breaking backwards compatibility. What I'm hoping is that browsers/phone that support this can assist the use...
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What are the advantages of NumPy over regular Python lists?

What are the advantages of NumPy over regular Python lists? 5 Answers 5 ...
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Does name length impact performance in Redis?

I like to use verbose names in Redis, for instance set-allBooksBelongToUser:$userId . 4 Answers ...
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Why is a 3-way merge advantageous over a 2-way merge?

Wikipedia says a 3-way merge is less error-prone than a 2-way merge, and often times doesn't need user intervention. Why is this the case? ...