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Why is 1/1/1970 the “epoch time”?

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Selecting data from two different servers in SQL Server

How can I select data in the same query from two different databases that are on two different servers in SQL Server? 15 An...
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How to find all tables that have foreign keys that reference particular table.column and have values

I have a table whose primary key is referenced in several other tables as a foreign key. For example: 7 Answers ...
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Determining the last changelist synced to in Perforce

A question that occasionally arises is what is the best way to determine the changelist that you last synced to in Perforce. This is often needed for things like injecting the changelist number into the revision info by the automatic build system. ...
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Symbolic links and synced folders in Vagrant

I want to use Vagrant to provide a common development environment to my team. The hosts are completely different: 6 Answers...
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How do I convert a pandas Series or index to a Numpy array? [duplicate]

Do you know how to get the index or column of a DataFrame as a NumPy array or python list? 8 Answers ...
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Is gcc's __attribute__((packed)) / #pragma pack unsafe?

In C, the compiler will lay out members of a struct in the order in which they're declared, with possible padding bytes inserted between members, or after the last member, to ensure that each member is aligned properly. ...
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Understanding FFT output

I need some help understanding the output of the DFT/FFT computation. 4 Answers 4 ...
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How to find the largest file in a directory and its subdirectories?

We're just starting a UNIX class and are learning a variety of Bash commands. Our assignment involves performing various commands on a directory that has a number of folders under it as well. ...
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Read file data without saving it in Flask

I am writing my first flask application. I am dealing with file uploads, and basically what I want is to read the data/content of the uploaded file without saving it and then print it on the resulting page. Yes, I am assuming that the user uploads a text file always. ...