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Create an empty list in python with certain size
I want to create an empty list (or whatever is the best way) that can hold 10 elements.
15 Answers
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Matplotlib different size subplots
...np
import matplotlib.pyplot as plt
# generate some data
x = np.arange(0, 10, 0.2)
y = np.sin(x)
# plot it
f, (a0, a1) = plt.subplots(1, 2, gridspec_kw={'width_ratios': [3, 1]})
a0.plot(x, y)
a1.plot(y, x)
f.tight_layout()
f.savefig('grid_figure.pdf')
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How to configure PostgreSQL to accept all incoming connections
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218
Just use 0.0.0.0/0.
host all all 0.0.0.0/0 md5
Make su...
Sort points in clockwise order?
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195
First, compute the center point.
Then sort the points using whatever sorting algorithm you lik...
Regex to remove all (non numeric OR period)
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169
This should do it:
string s = "joe ($3,004.50)";
s = Regex.Replace(s, "[^0-9.]", "");
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Frequency table for a single variable
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153
Maybe .value_counts()?
>>> import pandas
>>> my_series = pandas.Series([1,2...
What is the difference between 0.0.0.0, 127.0.0.1 and localhost?
... mac. I found that Jekyll server will bind to 0.0.0.0:4000 instead of 127.0.0.1:4000 . Also gem server will bind to this address by default. I can still visit it via http://localhost:port . But for Jekyll , it seems that the default setting (e.g. 0.0.0.0:4000) requires Internet access. I c...
C char array initialization
...t how you initialize an array, but for:
The first declaration:
char buf[10] = "";
is equivalent to
char buf[10] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
The second declaration:
char buf[10] = " ";
is equivalent to
char buf[10] = {' ', 0, 0, 0, 0, 0, 0, 0, 0, 0};
The third declaration:
char buf...
Checking if a string can be converted to float in Python
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16 Answers
16
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