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Can't find the 'libpq-fe.h header when trying to install pg gem
I am using the Ruby on Rails 3.1 pre version. I like to use PostgreSQL, but the problem is installing the pg gem. It gives me the following error:
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Split an NSString to access one particular piece
I have a string like this: @"10/04/2011" and I want to save only the "10" in another string. How can I do that?
7 Answers...
cv2.imshow command doesn't work properly in opencv-python
...ple code created a window of the correct name, but its content is just blank and doesn't show the image:
15 Answers
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How do I tell CPAN to install all dependencies?
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Here is the one-liner making these changes permanent including automatic first-time CPAN configuration:
perl -MCPAN -e 'my $c = "CPAN::HandleConfig"; $c->load(doit => 1, autoconfig => 1); $c->edit(prerequisites_policy => "follow"); $...
I get exception when using Thread.sleep(x) or wait()
...Aug 6 '14 at 17:35
Eric Leschinski
114k4949 gold badges368368 silver badges313313 bronze badges
answered Jul 27 '10 at 10:31
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Why does Math.round(0.49999999999999994) return 1?
... precisely this one pathological case.2 Java 7 no longer mandates this broken implementation.3
The problem
0.5+0.49999999999999994 is exactly 1 in double precision:
static void print(double d) {
System.out.printf("%016x\n", Double.doubleToLongBits(d));
}
public static void main(String args[...
Getting Git to work with a proxy server - fails with “Request timed out”
...8080 to the proxy port configured on your proxy server
Note that this works for both http and https repos.
If you decide at any time to reset this proxy and work without proxy:
Command to use:
git config --global --unset http.proxy
Finally, to check the currently set proxy:
git config --glob...
Visual Studio: How to show Overloads in IntelliSense?
Once code has been written, the only way I know of to view the overloads for a method is to actually edit the method by deleting the Parenthesis () and reopening them.
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Possible reasons for timeout when trying to access EC2 instance
...be the reasons why, and what can I do to resolve it? Rebooting normally takes a long time to take effect, and might just makes things worst
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What is a StackOverflowError?
What is a StackOverflowError , what causes it, and how should I deal with them?
15 Answers
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