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How to check if all elements of a list matches a condition?
I have a list consisting of like 20000 lists. I use each list's 3rd element as a flag. I want to do some operations on this list as long as at least one element's flag is 0, it's like:
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What does |= (ior) do in Python?
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53
|= performs an in-place+ operation between pairs of objects. In particular, between:
sets: a u...
Kill a Process by Looking up the Port being used by it from a .BAT
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edited Dec 1 '11 at 3:01
answered Jun 1 '11 at 16:13
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Grid of responsive squares
...t you can code :
HTML :
<div></div>
CSS
div {
width: 30%;
padding-bottom: 30%; /* = width for a square aspect ratio */
}
Here is a simple layout example of 3*3 squares grid using the code above.
With this technique, you can make any other aspect ratio, here is a table gi...
Why is the shovel operator (
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Proof:
a = 'foo'
a.object_id #=> 2154889340
a << 'bar'
a.object_id #=> 2154889340
a += 'quux'
a.object_id #=> 2154742560
So << alters the original string rather than creating a new one. The reason for this is that in ruby a += b is syntactic sho...
Using bitwise OR 0 to floor a number
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163
How does it work? Our theory was that using such an operator casts the
number to an integer...
startsWith() and endsWith() functions in PHP
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33 Answers
33
Active
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How to create a density plot in matplotlib?
...mpy as np
from scipy.stats import gaussian_kde
data = [1.5]*7 + [2.5]*2 + [3.5]*8 + [4.5]*3 + [5.5]*1 + [6.5]*8
density = gaussian_kde(data)
xs = np.linspace(0,8,200)
density.covariance_factor = lambda : .25
density._compute_covariance()
plt.plot(xs,density(xs))
plt.show()
I get
which is pretty...
Finding all possible combinations of numbers to reach a given sum
...ning, target, partial + [n])
if __name__ == "__main__":
subset_sum([3,9,8,4,5,7,10],15)
#Outputs:
#sum([3, 8, 4])=15
#sum([3, 5, 7])=15
#sum([8, 7])=15
#sum([5, 10])=15
This type of algorithms are very well explained in the following Standford's Abstract Programming lec...
Append integer to beginning of list in Python [duplicate]
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833
>>>var=7
>>>array = [1,2,3,4,5,6]
>>>array.insert(0,var)
>>&gt...