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Why does typeof NaN return 'number'?
...) + ∞ and equivalent subtractions.
Real operations with complex results:
The square root of a negative number
The logarithm of a negative number
The tangent of an odd multiple of 90 degrees (or π/2 radians)
The inverse sine or cosine of a number which is less than −1 ...
What is a “callable”?
...documentation)
Called when the instance is ''called'' as a function
Example
class Foo:
def __call__(self):
print 'called'
foo_instance = Foo()
foo_instance() #this is calling the __call__ method
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SQL Update with row_number()
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One more option
UPDATE x
SET x.CODE_DEST = x.New_CODE_DEST
FROM (
SELECT CODE_DEST, ROW_NUMBER() OVER (ORDER BY [RS_NOM]) AS New_CODE_DEST
FROM DESTINATAIRE_TEMP
) x
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How to read the RGB value of a given pixel in Python?
...pen an image with open("image.jpg") , how can I get the RGB values of a pixel assuming I have the coordinates of the pixel?
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Installing Java on OS X 10.9 (Mavericks)
I have installed the JDK on Mac OS X v10.8 (Mountain Lion). When I upgraded it to Mac OS X v10.9 (Mavericks) and ran java -version in the terminal, it showed:
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What's the difference between tilde(~) and caret(^) in package.json?
... --save . It saves the entry in the package.json with the caret ^ prefix. Previously, it was a tilde ~ prefix.
19 An...
Code for Greatest Common Divisor in Python [closed]
...in fractions is deprecated. Moreover, inspect.getsource no longer returns explanatory source code for either method.
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How to convert Milliseconds to “X mins, x seconds” in Java?
... want to show them the time elapsed using a human readable format such as "XX hours, XX mins, XX seconds" or even "XX mins, XX seconds" because its not likely to take someone an hour.
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Why can I change value of a constant in javascript
...g to the "list" that the constant points to.
So this works fine:
const x = {};
x.foo = 'bar';
console.log(x); // {foo : 'bar'}
x.foo = 'bar2';
console.log(x); // {foo : 'bar2'}
and this:
const y = [];
y.push('foo');
console.log(y); // ['foo']
y.unshift("foo2");
console.log(y); // ...
How do you do a simple “chmod +x” from within python?
I want to create a file from within a python script that is executable.
7 Answers
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