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What algorithms compute directions from point A to point B on a map?
...oughly half the work (2*pi*(r/2)^2 vs pi*r^2).
To avoid exploring the back-alleys of every city between your source and destination, you can have several layers of map data: A 'highways' layer that contains only highways, a 'secondary' layer that contains only secondary streets, and so forth. Then, ...
How can I refresh a page with jQuery?
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This should work on all browsers even without jQuery:
location.reload();
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SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
...L Certificate Authority (CA) bundle. You can do this with:
sudo port install curl-ca-bundle [if you are using MacPorts]
or just pull it down directly wget http://curl.haxx.se/ca/cacert.pem
Execute the ruby code that is trying to verify the SSL certification: SSL_CERT_FILE=/opt/local/etc/certs/ca...
Can we have functions inside functions in C++?
...rm of a lambda:
int main() {
// This declares a lambda, which can be called just like a function
auto print_message = [](std::string message)
{
std::cout << message << "\n";
};
// Prints "Hello!" 10 times
for(int i = 0; i < 10; i++) {
print...
Error: The processing instruction target matching “[xX][mM][lL]” is not allowed
...ng error
The processing instruction target matching "[xX][mM][lL]" is not allowed.
when an XML declaration is encountered anywhere other than at the top of an XML file.
This is a valid diagnostic message; other XML parsers should issue a similar error message in this situation.
To correct the p...
How to select rows with one or more nulls from a pandas DataFrame without listing columns explicitly
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@vishal I think all you would need to do is add loc like this; df.loc[df.isnull().any(axis=1)]
– James Draper
Sep 17 '18 at 17:41
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How to have multiple CSS transitions on an element?
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Transition properties are comma delimited in all browsers that support transitions:
.nav a {
transition: color .2s, text-shadow .2s;
}
ease is the default timing function, so you don't have to specify it. If you really want linear, you will need to specify it:
tra...
ipython notebook clear cell output in code
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Using the clear_output(wait=True) will generally make the result nicer if you have clear_output inside a loop.
– Toke Faurby
Jun 8 '17 at 23:49
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How to format a phone number with jQuery
...nts within input fields. jsfiddle.net/gUsUK
– Zach Shallbetter
May 29 '13 at 18:48
3
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What do 'lazy' and 'greedy' mean in the context of regular expressions?
...xr, a great tool that will help you explore Regular Expressions - I use it all the time.
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