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How to check if a string is a valid hex color representation?
... -> match end
i -> ignore case
If you need support for 3-character HEX codes, use the following:
/^#([0-9A-F]{3}){1,2}$/i.test('#ABC')
The only difference here is that
[0-9A-F]{6}
is replaced with
([0-9A-F]{3}){1,2}
This means that instead of matching exactly 6 charact...
How do you get centered content using Twitter Bootstrap?
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23 Answers
23
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How to create a density plot in matplotlib?
...mpy as np
from scipy.stats import gaussian_kde
data = [1.5]*7 + [2.5]*2 + [3.5]*8 + [4.5]*3 + [5.5]*1 + [6.5]*8
density = gaussian_kde(data)
xs = np.linspace(0,8,200)
density.covariance_factor = lambda : .25
density._compute_covariance()
plt.plot(xs,density(xs))
plt.show()
I get
which is pretty...
How can I set the default value for an HTML element?
...the option you want to be the default.
<option selected="selected">
3
</option>
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Access nested dictionary items via a list of keys?
...
236
Use reduce() to traverse the dictionary:
from functools import reduce # forward compatibility ...
vim deleting backward tricks
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answered Sep 3 '09 at 15:01
Lucas OmanLucas Oman
14.4k22 gold badges4242 silver badges4545 bronze badges
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Setting href attribute at runtime
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379
To get or set an attribute of an HTML element, you can use the element.attr() function in jQue...
Find nearest value in numpy array
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531
import numpy as np
def find_nearest(array, value):
array = np.asarray(array)
idx = (np....
Switch case with fallthrough?
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314
Use a vertical bar (|) for "or".
case "$C" in
"1")
do_this()
;;
"2" | "3")
do_wha...
Python - When to use file vs open
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153
You should always use open().
As the documentation states:
When opening a file, it's prefer...