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How should I unit test threaded code?
...ike to ask how people have gone about testing code that relies on threads for successful execution, or just how people have gone about testing those kinds of issues that only show up when two threads interact in a given manner?
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How to convert a factor to integer\numeric without loss of information?
When I convert a factor to a numeric or integer, I get the underlying level codes, not the values as numbers.
10 Answers
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count (non-blank) lines-of-code in bash
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Not sure why you're using cat there. Use foo.c or foo.pl as the filename to pass to sed. sed '/^\s*$/d' foo.c | wc -l
– Andy Lester
Sep 24 '08 at 3:58
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Try/Catch block in PHP not catching Exception
... the namespace called B!). All I had to do to fix it was to add backslash (or whatever it's called) to the exception name so it would look like this: \A\MyException
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What's the yield keyword in JavaScript?
I heard about a "yield" keyword in JavaScript, but I found very poor documentation about it. Can someone explain me (or recommend a site that explains) its usage and what it is used for?
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How can I know if a branch has been already merged into master?
I have a git repository with multiple branches.
9 Answers
9
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Most pythonic way to delete a file which may not exist
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A more pythonic way would be:
try:
os.remove(filename)
except OSError:
pass
Although this takes even more lines and looks very ugly, it avoids the unnecessary call to os.path.exists() and follows the python convention...
Unable to run app in Simulator: Xcode beta 6 iOS 8
I am unable to launch my app on simulator using Xcode 6 beta and iPhone 5s simulator.
First I am getting an error message from Simulator
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CSS background opacity with rgba not working in IE 8
I am using this CSS for background opacity of a <div> :
15 Answers
15
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What is the fastest way to compute sin and cos together?
I would like to compute both the sine and co-sine of a value together (for example to create a rotation matrix). Of course I could compute them separately one after another like a = cos(x); b = sin(x); , but I wonder if there is a faster way when needing both values.
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