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How do I create an average from a Ruby array?
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Why is creating a Thread said to be expensive?
The Java tutorials say that creating a Thread is expensive. But why exactly is it expensive? What exactly is happening when a Java Thread is created that makes its creation expensive? I'm taking the statement as true, but I'm just interested in mechanics of Thread creation in JVM.
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How to check if a Constraint exists in Sql server?
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in a “using” block is a SqlConnection closed on return or exception?
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Indent multiple lines quickly in vi
It should be trivial, and it might even be in the help, but I can't figure out how to navigate it. How do I indent multiple lines quickly in vi?
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Is Big O(logn) log base e?
For binary search tree type of data structures, I see the Big O notation is typically noted as O(logn). With a lowercase 'l' in log, does this imply log base e (n) as described by the natural logarithm? Sorry for the simple question but I've always had trouble distinguishing between the different...
Warning message: In `…` : invalid factor level, NA generated
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When is it better to use String.Format vs string concatenation?
I've got a small piece of code that is parsing an index value to determine a cell input into Excel. It's got me thinking...
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Why do people say that Ruby is slow? [closed]
I like Ruby on Rails and I use it for all my web development projects. A few years ago there was a lot of talk about Rails being a memory hog and about how it didn't scale very well but these suggestions were put to bed by Gregg Pollack here.
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How often should you use git-gc?
How often should you use git-gc?
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