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Difference between Service, Async Task & Thread?

What is the difference between Service, Async Task & Thread. If i am not wrong all of them are used to do some stuff in background. So, how to decide which to use and when? ...
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C/C++ check if one bit is set in, i.e. int variable

Is there such a way to check if bit 3 in temp is 1 or 0 without bit shifting and masking. 21 Answers ...
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How to plot two histograms together in R?

I am using R and I have two data frames: carrots and cucumbers. Each data frame has a single numeric column which lists the length of all measured carrots (total: 100k carrots) and cucumbers (total: 50k cucumbers). ...
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How to correctly use the extern keyword in C

My question is about when a function should be referenced with the extern keyword in C. 10 Answers ...
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Is there a (repeat-last-command) in Emacs?

Frequently, I've dug into apropos and docs looking for something like the following only to give up to get back to the task at hand: ...
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Why does C++ not have reflection?

This is a somewhat bizarre question. My objectives are to understand the language design decision and to identify the possibilities of reflection in C++. ...
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iOS White to Transparent Gradient Layer is Gray

I have a CAGradientLayer inserted to the bottom of this small detail view that pops up at the bottom of the app. As you can see, I've set the colors from white to clear, but there's this strange gray tint that is showing up. Any ideas? ...
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print call stack in C or C++

Is there any way to dump the call stack in a running process in C or C++ every time a certain function is called? What I have in mind is something like this: ...
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Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C

What is the most efficient algorithm to achieve the following: 27 Answers 27 ...
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'System.Net.Http.HttpContent' does not contain a definition for 'ReadAsAsync' and no extension metho

I made a console app to consume a Web API I just made. The console app code does not compile. It gives me the compilation error: ...