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Right query to get the current number of connections in a PostgreSQL DB
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Those two requires aren't equivalent. The equivalent version of the first one would be:
SELECT sum(numbackends) FROM pg_stat_database;
In that case, I would expect that version to be slightly faster than the second one, simp...
Continuous Integration for Ruby on Rails? [closed]
... But once you set it up you get a whole lot of plugins that can pull from most anywhere, run most anything, and report most everything. The OS X Installer points Jenkins at /Users/Shared/Jenkins/Home but fails to create that directory or chown it to daemon (which is uses by default, and you should c...
How do I declare an array of weak references in Swift?
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Please post your problem code in a new question; no reason to ding my answer when it might be your code!
– GoZoner
Jul 30 '15 at 0:35
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How to increase font size in a plot in R?
...need to use cex.names (if you're a human who reads things from an upright position, you might also want las=2)
– geneorama
Jan 12 '16 at 20:13
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Visual Studio “Could not copy” … during build
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I have encountered similar error messages in Visual Studio 2013.
Mostly, I have found that this situation has occurred when a debug process was halted because of an exception.
When clean+build has not resolved this problem for me, I have had success by doing the following:
Closing Visual...
What does && mean in void *p = &&abc;
I came across a piece of code void *p = &&abc; . What is the significance of && here?
I know about rvalue references but I think && used in this context is different. What does && indicate in void *p = &&abc; ?
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How to check if AlarmManager already has an alarm set?
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Following up on the comment ron posted, here is the detailed solution. Let's say you have registered a repeating alarm with a pending intent like this:
Intent intent = new Intent("com.my.package.MY_UNIQUE_ACTION");
PendingIntent pendingIntent = PendingInte...
What is a pre-revprop-change hook in SVN, and how do I create it?
I wanted to edit a log comment in the repository browser and received an error message that no pre-revprop-change hook exists for the repository. Besides having a scary name, what is a pre-revprop-change hook, and how do I create it?
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Do browsers send “\r\n” or “\n” or does it depend on the browser?
... all sorts of line terminators. (Note that in addition to CRLF and LF, Mac OS-9 used CR alone, and there are still a few of those around. The Unicode standard (section 5.8) specifies a wide range of character sequences that should be recognized as line terminators; there's a list of them here.)
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Displaying the Indian currency symbol on a website
...Rupee is a web API for the Indian currency symbol. It provides a simple, cross browser method for using the Rrupee symbol on your webpage, blog or anywhere on the web.
Here is a method for printing the Indian currency symbol:
<html>
<head>
<link rel="stylesheet" type="text/css" ...