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How can I use if/else in a dictionary comprehension?
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Worth mentioning that you don't need to have an if-else condition for both the key and the value. For example, {(a if condition else b): v...
How to subtract date/time in JavaScript? [duplicate]
...e() - new Date(dateStr.replace(/-/g,'/')));
i.e. turning "2011-02-07 15:13:06" into new Date('2011/02/07 15:13:06'), which is a format the Date constructor can comprehend.
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Using a dictionary to count the items in a list [duplicate]
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in 2.7 and 3.1 there is special Counter dict for this purpose.
>>> from collections import Counter
>>> Counter(['apple','red','apple','red','red','pear'])
Counter({'red': 3, 'apple': 2, 'pear': 1})
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python plot normal distribution
...math
mu = 0
variance = 1
sigma = math.sqrt(variance)
x = np.linspace(mu - 3*sigma, mu + 3*sigma, 100)
plt.plot(x, stats.norm.pdf(x, mu, sigma))
plt.show()
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In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?
Is there a corresponding X mark to ✓ ( ✓ )? What is it?
4 Answers
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Pairs from single list
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answered Jan 7 '11 at 17:35
Jochen RitzelJochen Ritzel
89.3k2525 gold badges181181 silver badges180180 bronze badges
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Python extending with - using super() Python 3 vs Python 2
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super() (without arguments) was introduced in Python 3 (along with __class__):
super() -> same as super(__class__, self)
so that would be the Python 2 equivalent for new-style classes:
super(CurrentClass, self)
for old-style classes you can always use:
class Classname...
What is “entropy and information gain”?
...# ------------------------------------------------
Ashley 1 3 6 f
Brian 0 2 5 m
Caroline 1 4 8 f
David 0 2 5 m
The goal is to build a decision tree. An example of a tree ...
Rails 3.1 and Image Assets
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In 3.1 you just get rid of the 'images' part of the path. So an image that lives in /assets/images/example.png will actually be accessible in a get request at this url - /assets/example.png
Because the assets/images folder gets...
UIView with rounded corners and drop shadow?
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33 Answers
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