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Check existence of directory and create if doesn't exist
I often find myself writing R scripts that generate a lot of output. I find it cleaner to put this output into it's own directory(s). What I've written below will check for the existence of a directory and move into it, or create the directory and then move into it. Is there a better way to approach...
How can I combine hashes in Perl?
What is the best way to combine both hashes into %hash1? I always know that %hash2 and %hash1 always have unique keys. I would also prefer a single line of code if possible.
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What is the purpose of willSet and didSet in Swift?
Swift has a property declaration syntax very similar to C#'s:
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How can I list ALL DNS records?
Is there any way I can list ALL DNS records for a domain?
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difference between foldLeft and reduceLeft in Scala
I have learned the basic difference between foldLeft and reduceLeft
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Read stream twice
How do you read the same inputstream twice? Is it possible to copy it somehow?
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Visual Studio: Relative Assembly References Paths
When adding a reference to an assembly located within the solution directory, is there any way to add it relatively, so that when checked in and out of a repository it is referenced in projects correctly?
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What exactly does += do in python?
I need to know what += does in python. It's that simple. I also would appreciate links to definitions of other short hand tools in python.
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PostgreSQL Autoincrement
I'm switching from MySQL to PostgreSQL and was wondering how I can do autoincrement values. I saw in the PostgreSQL docs a datatype "serial", but I get syntax errors when using it (in v8.0).
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Android studio using > 100% CPU at all times - no background processes appear to be running
I've noticed Android Studio (when running) uses greater than 100% CPU at all times, even when it appears there are no background processes that the IDE is running (indexing, etc). I might suspect this were something specific to my box, but some fellow developers are encountering this as well.
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