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Excluding directories in os.walk
I'm writing a script that descends into a directory tree (using os.walk()) and then visits each file matching a certain file extension. However, since some of the directory trees that my tool will be used on also contain sub directories that in turn contain a LOT of useless (for the purpose of thi...
Difference between make and build in Android Studio
The Android Studio Build menu has options including
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How to change owner of PostgreSql database?
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ALTER DATABASE name OWNER TO new_owner;
See the Postgresql manual's entry on this for more details.
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Running a cron job at 2:30 AM everyday
How to configure a cron job to run every night at 2:30? I know how to make it run at 2, but not 2:30.
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Rails: select unique values from a column
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Model.select(:rating)
Result of this is a collection of Model objects. Not plain ratings. And from uniq's point of view, they are completely different. You can use this:
Model.select(:rating).map(&:rating).uniq
or th...
Subset of rows containing NA (missing) values in a chosen column of a data frame
We have a data frame from a CSV file. The data frame DF has columns that contain observed values and a column ( VaR2 ) that contains the date at which a measurement has been taken. If the date was not recorded, the CSV file contains the value NA , for missing data.
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Installing Apple's Network Link Conditioner Tool
I have installed xcode 4.3.1 on my machine running Lion.
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How to find an element by matching exact text of the element in Capybara
I have following two elements in HTML
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How do I merge a git tag onto a branch
I'm trying to find the syntax for merging a tagged commit onto another branch. I'm guessing that it's straight forward but my feeble search attempts aren't finding it.
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Loop through each row of a range in Excel
This is one of those things that I'm sure there's a built-in function for (and I may well have been told it in the past), but I'm scratching my head to remember it.
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