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How do I undo a checkout in git?

I just checked out an earlier commit from my local git repo. I haven't made any changes to it, I was just looking at it. Now I want to go back to my latest commit - how do I do that? ...
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Should I use scipy.pi, numpy.pi, or math.pi?

In a project using SciPy and NumPy, should I use scipy.pi , numpy.pi , or math.pi ? 2 Answers ...
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Check if key exists and iterate the JSON array using Python

I have a bunch of JSON data from Facebook posts like the one below: 7 Answers 7 ...
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How to check if element exists using a lambda expression?

Specifically, I have TabPane, and I would like to know if there is element with specific ID in it. 3 Answers ...
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Django in / not in query

... how to write a 'not in' style query in django. For example, the query structure I'm thinking of would look like this. 5 An...
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What is difference between cacerts and keystore?

What's the difference between the two, cacerts and keystore? 4 Answers 4 ...
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Vim: How do you open another [No Name] buffer like the one on startup?

In my Vimscript program, I need to open an additional Vim buffer that is not immediately associated with a file, but which the user can save to a file of her/his choosing, just like the initial buffer called [No Name] . How can I do this? ...
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Why does gulp.src not like being passed an array of complete paths to files?

I'm attempting to pass gulp.src an array of files that I want it to deal with. This is the array as it stands. 1 Answer ...
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How to detect READ_COMMITTED_SNAPSHOT is enabled?

In MS SQL Server is there a way to detect whether a database has had its isolation level set via the T-SQL command ALTER DATABASE <database> SET READ_COMMITTED_SNAPSHOT ON; ...
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Python 2.7: Print to File

Why does trying to print directly to a file instead of sys.stdout produce the following syntax error: 6 Answers ...