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What does it mean to “program to an interface”?
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Using interfaces is a key factor in making your code easily testable in addition to removing unnecessary couplings between your classes. By creating an interface that defines the operations on your class, you allow classes that want to use that functionality the ability to use it wit...
Python `if x is not None` or `if not x is None`?
... see what literals are evaluated to True or False in Python:
Truth Value Testing
Edit for comment below:
I just did some more testing. not x is None doesn't negate x first and then compared to None. In fact, it seems the is operator has a higher precedence when used that way:
>>> x...
“Origin null is not allowed by Access-Control-Allow-Origin” error for request made by application ru
... trying to do a cross-domain XMLHttpRequest via CORS...
Make sure you're testing via http://. Scripts running via file:// have limited support for CORS.
Make sure the browser actually supports CORS. (Opera and Internet Explorer are late to the party)
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How do I log ALL exceptions globally for a C# MVC4 WebAPI app?
...called for all unhandled exceptions in your code, including the one in the test action you have shown. So all you have to do is handle this exception inside the Application_Error event. In the sample code you have shown you are only handling exception of type HttpException which is obviously not the...
Parameterize an SQL IN clause
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Make sure you test on tags that have pipes in them.
– Joel Coehoorn
Dec 3 '08 at 17:16
18
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Is there a way to detect if an image is blurry?
...nted Simon's suggestion and this one in Mathematica, and tried it on a few test images:
The first test blurs the test images using a Gaussian filter with a varying kernel size, then calculates the FFT of the blurred image and takes the average of the 90% highest frequencies:
testFft[img_] := Tab...
Is it possible to send a variable number of arguments to a JavaScript function?
...eful to you, that you can know how many arguments a function expects:
var test = function (one, two, three) {};
test.length == 3;
But anyway you can pass an arbitrary number of arguments...
The spread syntax is shorter and "sweeter" than apply and if you don't need to set the this value in the ...
Code Golf - π day
...based on same formula as FORTRAN solution (slightly different results than test cases). Calculates X^2=R^2-Y^2 for every Y
[rdPr1-d0<p]sp1?dsMdd*sRd2%--
[dd*lRr-vddlMr-32rlpxRR42r2*lpxRRAP4*2+lN+sN2+dlM>y]
dsyx5klNlR/p
88 chars. Iterative solution. Matches test cases. For every X and Y chec...
Java Reflection: How to get the name of a variable?
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I think Pourquoi Litytestdata is right. Obviously fields can't be optimized away, so Marcel J. must be thinking of local variables.
– Michael Myers♦
Apr 13 '09 at 15:34
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Why should we NOT use sys.setdefaultencoding(“utf-8”) in a py script?
...ng: utf-8 -*-
u = u'moçambique'
print u.encode("utf-8")
print u
chmod +x test.py
./test.py
moçambique
moçambique
./test.py > output.txt
Traceback (most recent call last):
File "./test.py", line 5, in <module>
print u
UnicodeEncodeError: 'ascii' codec can't encode character
u'\xe...