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Why are dates calculated from January 1st, 1970?

... It is the standard of Unix time. Unix time, or POSIX time, is a system for describing points in time, defined as the number of seconds elapsed since midnight proleptic Coordinated Universal Time (UTC) of January 1, 1970, ...
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Why should I use an IDE? [closed]

...gramming, and works in an environment where most/all of my colleagues use either vim or emacs for all of their work, what are the advantages of IDEs? Why should I use one? ...
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Should switch statements always contain a default clause?

In one of my first code reviews (a while back), I was told that it's good practice to include a default clause in all switch statements. I recently remembered this advice but can't remember what the justification was. It sounds fairly odd to me now. ...
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How to export data as CSV format from SQL Server using sqlcmd?

I can quite easily dump data into a text file such as: 11 Answers 11 ...
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django - why is the request.POST object immutable?

As the title asks, why did the Django guys decide to implement the request.POST object with a querydict (which, of course, in turn, makes the whole thing immutable?) ...
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What is the C runtime library?

What actually is a C runtime library and what is it used for? I was searching, Googling like a devil, but I couldn't find anything better than Microsoft's: "The Microsoft run-time library provides routines for programming for the Microsoft Windows operating system. These routines automate many commo...
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Understanding Canvas and Surface concepts

...s of drawing to SurfaceView and therefore the whole Surface / Canvas / Bitmap system, which is used in Android. 3 Answe...
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Join vs. sub-query

...ed JOIN over sub-query. But nowadays everyone uses sub-query, and I hate it; I don't know why. 19 Answers ...
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How do you force a makefile to rebuild a target

...ther makefile. Since this makefile calls more makefiles that does the work it doesnt really change. Thus it keeps thinking the project is built and upto date. ...
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Cartesian product of multiple arrays in JavaScript

... 2020 Update: 1-line (!) answer with vanilla JS Original 2017 Answer: 2-line answer with vanilla JS: (see updates below) All of the answers here are overly complicated, most of them take 20 lines of code or even more. This example uses just two lines of vani...