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How to detect total available/free disk space on the iPhone/iPad device?

I'm looking for a better way to detect available/free disk space on the iPhone/iPad device programmatically. Currently I'm using the NSFileManager to detect the disk space. Following is the snippet of the code which does the job for me: ...
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If my interface must return Task what is the best way to have a no-operation implementation?

In the code below, due to the interface, the class LazyBar must return a task from its method (and for argument's sake can't be changed). If LazyBar s implementation is unusual in that it happens to run quickly and synchronously - what is the best way to return a No-Operation task from the method...
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How do I erase an element from std::vector by index?

I have a std::vector, and I want to delete the n'th element. How do I do that? 15 Answers ...
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StringUtils.isBlank() vs String.isEmpty()

I ran into some code that has the following: 11 Answers 11 ...
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Get key by value in dictionary

I made a function which will look up ages in a Dictionary and show the matching name: 34 Answers ...
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Twig for loop for arrays with keys

I use Twig and I have an array with keys like this: 4 Answers 4 ...
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How to check a not-defined variable in JavaScript

I wanted to check whether the variable is defined or not. For example, the following throws a not-defined error 14 Answer...
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Font scaling based on width of container

I'm having a hard time getting my head around font scaling. 35 Answers 35 ...
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How to remove text from a string?

I've got a data-123 string. 11 Answers 11 ...
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How to set timer in android?

Can someone give a simple example of updating a textfield every second or so? 21 Answers ...