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Random float number generation
...rogram's run -- not once every time you call rand(). This is often done like this:
srand (static_cast <unsigned> (time(0)));
In order to call rand or srand you must #include <cstdlib>.
In order to call time, you must #include <ctime>.
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Fastest Way to Find Distance Between Two Lat/Long Points
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This will select all points approximately within the box (@lat +/- 10 km, @lon +/- 10km).
This actually is not a box, but a spherical rectangle: latitude and longitude bound segment of the sphere. This may differ from a plain rectangle on the Franz Joseph Land, but quite close to it on most in...
What's is the difference between train, validation and test set, in neural networks?
... for each training data instance
propagate error through the network
adjust the weights
calculate the accuracy over training data
for each validation data instance
calculate the accuracy over the validation data
if the threshold validation accuracy is met
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Which is better: … or …
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This document thus defines text/javascript and text/ecmascript but marks them as "obsolete". Use of experimental and unregistered media types, as listed in part above, is discouraged. The media types,
* application/javascript
* application/ecmascript
which are also defined in this ...
Get the full URL in PHP
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Have a look at $_SERVER['REQUEST_URI'], i.e.
$actual_link = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
(Note that the double quoted string syntax is perfectly correct)
If you want to support both HTTP and HTTPS, you can use...
How to escape a JSON string to have it in a URL?
Using Javascript, I want to generate a link to a page. The parameters to the page are in a Javascript array that I serialize in JSON.
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Get last field using awk substr
I am trying to use awk to get the name of a file given the absolute path to the file.
For example, when given the input path /home/parent/child/filename I would like to get filename
I have tried:
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Why is an int in OCaml only 31 bits?
Haven't seen this "feature" anywhere else. I know that the 32nd bit is used for garbage collection. But why is it that way only for ints and not for the other basic types?
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How many parameters are too many? [closed]
...can define as many parameters as you may need, but too many of them will make your routine difficult to understand and maintain.
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Converting NSString to NSDate (and back again)
How would I convert an NSString like " 01/02/10 " (meaning 1st February 2010) into an NSDate ? And how could I turn the NSDate back into a string?
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