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Can't subtract offset-naive and offset-aware datetimes

I have a timezone aware timestamptz field in PostgreSQL. When I pull data from the table, I then want to subtract the time right now so I can get it's age. ...
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How to run a single RSpec test?

I have the following file: 17 Answers 17 ...
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DbEntityValidationException - How can I easily tell what caused the error?

I have a project that uses Entity Framework. While calling SaveChanges on my DbContext , I get the following exception: ...
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uwsgi invalid request block size

I'm running uwsgi in emperor mode 7 Answers 7 ...
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boolean in an if statement

Today I've gotten a remark about code considering the way I check whether a variable is true or false in a school assignment. ...
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How to add a custom Ribbon tab using VBA?

I am looking for a way to add a custom tab in the Excel ribbon which would carry a few buttons. I chanced on some resources addressing it via Google but all look dodgy and outrageously complicated. ...
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What new capabilities do user-defined literals add to C++?

C++11 introduces user-defined literals which will allow the introduction of new literal syntax based on existing literals ( int , hex , string , float ) so that any type will be able to have a literal presentation. ...
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How to start a background process in Python?

I'm trying to port a shell script to the much more readable python version. The original shell script starts several processes (utilities, monitors, etc.) in the background with "&". How can I achieve the same effect in python? I'd like these processes not to die when the python scripts complete. I ...
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How to pause a YouTube player when hiding the iframe?

I have a hidden div containing a YouTube video in an <iframe> . When the user clicks on a link, this div becomes visible, the user should then be able to play the video. ...
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How can I reverse the order of lines in a file?

I'd like to reverse the order of lines in a text file (or stdin), preserving the contents of each line. 25 Answers ...