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What's the difference between deadlock and livelock?
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402
Taken from http://en.wikipedia.org/wiki/Deadlock:
In concurrent computing, a deadlock is a stat...
How to position a div in the middle of the screen when the page is bigger than the screen
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269
just add position:fixed and it will keep it in view even if you scroll down. see it at http://...
Detect iPad Mini in HTML5
Apple's iPad Mini is a smaller clone of the iPad 2 in more ways than we'd want. In JavaScript, the window.navigator object exposes the same values for the Mini and iPad 2. My tests so far to detect the difference have not lead to success.
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How to sum a variable by group
...quency, by=list(Category=x$Category), FUN=sum)
Category x
1 First 30
2 Second 5
3 Third 34
In the example above, multiple dimensions can be specified in the list. Multiple aggregated metrics of the same data type can be incorporated via cbind:
aggregate(cbind(x$Frequency, x$Metric2,...
Commenting multiple lines in DOS batch file
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answered Dec 15 '11 at 21:39
pdubspdubs
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How comment a JSP expression?
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215
Pure JSP comments look like this:
<%-- Comment --%>
So if you want to retain the "="....
Python: access class property from string [duplicate]
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x = getattr(self, source) will work just perfectly if source names ANY attribute of self, incl...
How do I pick 2 random items from a Python set? [duplicate]
...currently have a Python set of n size where n >= 0. Is there a quick 1 or 2 lines Python solution to do it? For example, the set will look like:
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What's the difference between `=` and `
I'm using R 2.8.1 and it is possible to use both = and <- as variable assignment operators. What's the difference between them? Which one should I use?
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Complex numbers usage in python [closed]
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