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Convert Year/Month/Day to Day of Year in Python

I'm using the Python datetime module, i.e.: 7 Answers 7 ...
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How do I make a list of data frames?

How do I make a list of data frames and how do I access each of those data frames from the list? 8 Answers ...
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Web Reference vs. Service Reference

I just hit a huge brick wall with Paypal. I had created a regular C# project to create some wrapper classes using their WSDL. ...
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Validating parameters to a Bash script

...p with a basic one to help automate the process of removing a number of folders as they become unneeded. 10 Answers ...
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How do I remove the “extended attributes” on a file in Mac OS X?

...ript script that runs a stress test. Part of the test is to open, save, and close certain files. Somehow, the files have picked up some "extended attributes" that prohibit the files from being saved. That causes the stress test to fail. ...
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What is a “callback” in C and how are they implemented?

From the reading that I have done, Core Audio relies heavily on callbacks (and C++, but that's another story). 9 Answers ...
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How to find the operating system version using JavaScript?

How can I find the OS name and OS version using JavaScript? 13 Answers 13 ...
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Why does csvwriter.writerow() put a comma after each character?

This code opens the url and appends the /names at the end and opens the page and prints the string to test1.csv : 3 Answ...
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How to parse a CSV file in Bash?

I'm working on a long Bash script. I want to read cells from a CSV file into Bash variables. I can parse lines and the first column, but not any other column. Here's my code so far: ...
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R object identification

I am often ending up with a function producing output for which I don't understand the output data type. I'm expecting a list and it ends up being a list of lists or a data frame or something else. What's a good method or workflow for figuring out the output data type when first using a function? ...