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How to group time by hour or by 10 minutes

like when I do 13 Answers 13 ...
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Converting Dictionary to List? [duplicate]

I'm trying to convert a Python dictionary into a Python list, in order to perform some calculations. 7 Answers ...
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Difference between null and empty (“”) Java String

What is the difference between null and the "" (empty string)? 22 Answers 22 ...
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Have bash script answer interactive prompts [duplicate]

Is it possible to have a bash script automatically handle prompts that would normally be presented to the user with default actions? Currently I am using a bash script to call an in-house tool that will display prompts to the user (prompting for Y/N) to complete actions, however the script I'm writ...
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How do you run a single test/spec file in RSpec?

I want to be able to run a single spec file's tests — for the one file I'm editing, for example. rake spec executes all the specs. My project is not a Rails project, so rake spec:doc doesn't work. ...
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How do I encode/decode HTML entities in Ruby?

I am trying to decode some HTML entities, such as '<' becoming '<' . 7 Answers ...
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WordPress is giving me 404 page not found for all pages except the homepage

All of a sudden I go to my WordPress website and all the pages give me a 404 page not found page. I'm assuming the problem lies with the permalink structure, which I could swear I did not touch. The permalink setting is on "month and name." ...
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EF Migrations: Rollback last applied migration?

This looks like a really common task, but I can't find an easy way to do it. 14 Answers ...
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How to detect if a stored procedure already exists

I have to write a deployment script which will work if a stored procedure exists or does not exist. i.e. if it exists, then I need to alter it, otherwise create it. ...
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How can I plot with 2 different y-axes?

I would like superimpose two scatter plots in R so that each set of points has its own (different) y-axis (i.e., in positions 2 and 4 on the figure) but the points appear superimposed on the same figure. ...