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Why is there a `null` value in JavaScript?
...y had a purpose and you might well want to set a member to it, a different out-of-band value was required. So we have undefined, it's problematic as you point out, and it's another great JavaScript 'feature' we'll never be able to get rid of.
I actually use undefined when I want to unset the val...
Swapping two variable value without using third variable
...temporary variable and given that swapping is a common procedure it should output the optimum machine code for your platform.
Take for example this quick test program written in C.
#include <stdlib.h>
#include <math.h>
#define USE_XOR
void xorSwap(int* x, int *y){
if ( x != y ){...
Visual Studio 64 bit?
...ur mileage may vary). So
you start in a hole and you have to dig yourself out of that hole by
using the extra memory above 4G to your advantage. In Visual Studio
this can happen in some large solutions but I think a preferable thing
to do is to just use less memory in the first place. Many of VS...
Easy way to print Perl array? (with a little formatting)
Is there an easy way to print out a Perl array with commas in between each element?
11 Answers
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Image fingerprint to compare similarity of many images
I need to create fingerprints of many images (about 100.000 existing, 1000 new per day, RGB, JPEG, max size 800x800) to compare every image to every other image very fast. I can't use binary compare methods because also images which are nearly similar should be recognized.
...
What does it mean when an HTTP request returns status code 0?
...
I think you are probably right. (Although, as pointed out by @sleepycod wininet.dll would be expected to return some status code in the absence of a real http status code.)
– mike nelson
May 26 '09 at 21:17
...
Extracting specific columns in numpy array
...a = data[:,idx_IN_columns]
if you want to exclude specific columns:
idx_OUT_columns = [1, 9]
idx_IN_columns = [i for i in xrange(np.shape(data)[1]) if i not in idx_OUT_columns]
extractedData = data[:,idx_IN_columns]
shar...
BasicHttpBinding vs WsHttpBinding vs WebHttpBinding
...of security, not much else in terms of features - but compatible to just about any SOAP client out there --> great for interoperability, weak on features and security
wsHttpBinding is the full-blown binding, which supports a ton of WS-* features and standards - it has lots more security features,...
How to activate virtualenv?
I have been through search and tried various alternatives without success and spent several days on it now - driving me mad.
...
Android Studio installation on Windows 7 fails, no JDK found
...
OK, I figured out how fix this nasty bug.
Before you start
Go to your Android Studio installation folder and locate the bin folder. Inside the bin folder, you will find studio.bat. Execute the file, and it'll show the error. If it is abo...