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Disable a Button

...sable a button ( UIButton ) on iOS after it is clicked. I am new to developing for iOS but I think the equivalent code on objective - C is this: ...
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Multiple cases in switch statement

Is there a way to fall through multiple case statements without stating case value: repeatedly? 18 Answers ...
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Remove all subviews?

When my app gets back to its root view controller, in the viewDidAppear: method I need to remove all subviews. 15 Answers...
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Converting datetime.date to UTC timestamp in Python

I am dealing with dates in Python and I need to convert them to UTC timestamps to be used inside Javascript. The following code does not work: ...
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Is recursion ever faster than looping?

I know that recursion is sometimes a lot cleaner than looping, and I'm not asking anything about when I should use recursion over iteration, I know there are lots of questions about that already. ...
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How can I convert a Unix timestamp to DateTime and vice versa?

There is this example code, but then it starts talking about millisecond / nanosecond problems. 19 Answers ...
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How to find elements by class

I'm having trouble parsing HTML elements with "class" attribute using Beautifulsoup. The code looks like this 16 Answers ...
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Conveniently Declaring Compile-Time Strings in C++

Being able to create and manipulate strings during compile-time in C++ has several useful applications. Although it is possible to create compile-time strings in C++, the process is very cumbersome, as the string needs to be declared as a variadic sequence of characters, e.g. ...
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Replacing blank values (white space) with NaN in pandas

I want to find all values in a Pandas dataframe that contain whitespace (any arbitrary amount) and replace those values with NaNs. ...
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How can I add a hint text to WPF textbox?

For example, Facebook has a "Search" hint text in the Search text box when the textbox is empty. 14 Answers ...