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Measuring the distance between two coordinates in PHP
.../**
* Computes the distance between two coordinates.
*
* Implementation based on reverse engineering of
* <code>google.maps.geometry.spherical.computeDistanceBetween()</code>.
*
* @param float $lat1 Latitude from the first point.
* @param float $lng1 Longitude from the first point...
Convert Enumeration to a Set/List
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Espresso: Thread.sleep( );
...re I was waiting for a server response and changing visibility of elements based on response.
Whilst the solution above definitely helped, I eventually found this excellent example from chiuki and now use that approach as my go-to whenever I'm waiting for actions to occur during app idle periods.
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Get an element by index in jQuery
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What do I return if the return type of a method is Void? (Not void!)
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How do you get the magnitude of a vector in Numpy?
...
The function you're after is numpy.linalg.norm. (I reckon it should be in base numpy as a property of an array -- say x.norm() -- but oh well).
import numpy as np
x = np.array([1,2,3,4,5])
np.linalg.norm(x)
You can also feed in an optional ord for the nth order norm you want. Say you wanted the ...
What is the documents directory (NSDocumentDirectory)?
...toriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePath = paths.firstObject;
return basePath;
}
This Documents directory allows you to store files and subdirectories your app creates or may need.
To access files in the Library directory of your apps sandbox use (in...
Get all inherited classes of an abstract class [duplicate]
... you'd think.
You need to use Assembly.GetAssembly(typeof(T)) because your base class might be in a different assembly.
You need to use the criteria type.IsClass and !type.IsAbstract because it'll throw an exception if you try to instantiate an interface or abstract class.
I like forcing the enumer...
Twitter API returns error 215, Bad Authentication Data
...= "https://$host$path";
// mash everything together for the text to hash
$base_string = $method."&".rawurlencode($url)."&".rawurlencode($querystring);
// same with the key
$key = rawurlencode($consumer_secret)."&".rawurlencode($token_secret);
// generate the hash
$signature = rawurlen...
Is it true that one should not use NSLog() on production code?
...ce, you could have a logging class that writes to its own log file (or database), and includes a 'priority' argument you could set at runtime, so debug messages are not shown in your release version, but error messages are (if you did this you could make DebugLog(), WarningLog(), and so on).
Oh, an...