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Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
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10 Answers
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How to deal with floating point number precision in JavaScript?
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What is the _snowman param in Ruby on Rails 3 forms for?
...e is a hidden field named _snowman with the value of ☃ ( Unicode \x9731) showing up.
2 Answers
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Why do indexes in XPath start with 1 and not 0?
...king about our experience with VBScript with its odd features such as 1-based index instead of 0-based indexes like almost every other language has, the reasoning being that it was a language for users (e.g. Excel VBA) instead of a language for developers.
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Histogram Matplotlib
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import matplotlib.pyplot as plt
import numpy as np
mu, sigma = 100, 15
x = mu + sigma * np.random.randn(10000)
hist, bins = np.histogram(x, bins=50)
width = 0.7 * (bins[1] - bins[0])
center = (bins[:-1] + bins[1:]) / 2
plt.bar(center, hist, align='center', width=width)
plt.show()
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python capitalize first letter only
... you can use '2'.isdigit() to check for each character.
>>> s = '123sa'
>>> for i, c in enumerate(s):
... if not c.isdigit():
... break
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>>> s[:i] + s[i:].capitalize()
'123Sa'
sha...
How to change size of split screen emacs windows?
... same heights and widths.
C-x ^ (enlarge-window) increases the height by 1 line, or the prefix arg value. A negative arg shrinks the window. e.g. C-- C-1 C-6 C-x ^ shrinks by 16 rows, as does C-u - 1 6 C-x ^.
(There is no default binding for shrink-window.)
C-x } (enlarge-window-horizo...
How to select records from last 24 hours using SQL?
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How to loop over directories in Linux?
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cd /tmp
find . -maxdepth 1 -mindepth 1 -type d -printf '%f\n'
A short explanation:
find f...
How to PUT a json object with an array using curl
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Your command line should have a -d/--data inserted before the string you want to send in the P...