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Create PostgreSQL ROLE (user) if it doesn't exist
How do I write an SQL script to create a ROLE in PostgreSQL 9.1, but without raising an error if it already exists?
10 Answ...
Removing multiple keys from a dictionary safely
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edited Jan 16 '18 at 8:22
answered Jan 24 '12 at 23:20
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Rails 2.3-style plugins and deprecation warnings running task in Heroku
...tly as 2013-08, heroku always injected plugins in rails 3 apps, even apps with the recommended gems. This was an issue with the ruby buildpack, and was fixed by PR 11, merged on 2013-08-06.
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Refresh image with a new one at the same url
I am accessing a link on my site that will provide a new image each time it is accessed.
19 Answers
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What's the easy way to auto create non existing dir in ansible
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edited Jan 6 '16 at 19:26
answered Mar 18 '14 at 15:24
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How to change the background color of a UIButton while it's highlighted?
...dSet {
backgroundColor = isHighlighted ? UIColor.black : UIColor.white
}
}
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Dark color scheme for Eclipse [closed]
...Eclipse at all theme-able? I would like to install a dark color scheme for it, since I much prefer white text on dark background than the other way around.
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What would cause an algorithm to have O(log n) complexity?
My knowledge of big-O is limited, and when log terms show up in the equation it throws me off even more.
6 Answers
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close vs shutdown socket?
In C, I understood that if we close a socket, it means the socket will be destroyed and can be re-used later.
9 Answers
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Any reason not to start using the HTML 5 doctype? [closed]
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When serving as text/html, whether you use XHTML markup or HTML markup, it's treated by browsers as HTML.
So, really it comes down to using the shortest doctype that triggers standards mode (<!DOCTYPE html>) and using HTML markup that produces the correct result in browsers.
The rest is a...