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What are Vertex Array Objects?

...://openglbook.com/the-book/ I got to chapter 2, where I draw a triangle, and I understand everything except VAOs (is this acronym OK?). The tutorial has this code: ...
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Grep characters before and after match?

... 3 characters before and 4 characters after $> echo "some123_string_and_another" | grep -o -P '.{0,3}string.{0,4}' 23_string_and share | im...
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Javascript calculate the day of the year (1 - 366)

... Edit: The code above will fail when now is a date in between march 26th and October 29th andnow's time is before 1AM (eg 00:59:59). This is due to the code not taking daylight savings time into account. You should compensate for this: var now = new Date(); var start = new Date(now.getFullY...
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What is the significance of initializing direction arrays below with given values when developing ch

I am new to competitive programming, and I noticed frequently, many of the great coders have these four lines in their code (particularly in those involving arrays): ...
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Count work days between two dates

... @greektreat It works fine. It's just that both @StartDate and @EndDate are included in the count. If you want Monday to Tuesday to count as 1 day, just remove the "+ 1" after the first DATEDIFF. Then you'll also get Fri->Sat=0, Fri->Sun=0, Fri->Mon=1. –...
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What is the difference between CMD and ENTRYPOINT in a Dockerfile?

In Dockerfiles there are two commands that look similar to me: CMD and ENTRYPOINT . But I guess that there is a (subtle?) difference between them - otherwise it would not make any sense to have two commands for the very same thing. ...
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Trees in Twitter Bootstrap [closed]

...g to work on creating a tree (like a directory tree) that uses as much CSS and as little JS as possible (only for states, etc), and I want to know if there are some good existing tree plugins for bootstrap or jquery-ui bootstrap . ...
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Shell equality operators (=, ==, -eq)

Can someone please explain the difference between = , == and -eq in shell scripting? 4 Answers ...
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How can I make an svg scale with its parent container?

...cale when size is non-native. Of course I could have it as a separate file and scale it like that. 7 Answers ...
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How to darken a background using CSS?

...HOLE body. Is there any way I can just make the background-image darker, and not everything else? 8 Answers ...