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Android: upgrading DB version and adding new table
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281
1. About onCreate() and onUpgrade()
onCreate(..) is called whenever the app is freshly instal...
How to print a float with 2 decimal places in Java?
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263
You can use the printf method, like so:
System.out.printf("%.2f", val);
In short, the %.2f ...
Pandas conditional creation of a series/dataframe column
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print(df)
yields
Set Type color
0 Z A green
1 Z B green
2 X B red
3 Y C red
If you have more than two conditions then use np.select. For example, if you want color to be
yellow when (df['Set'] == 'Z') & (df['Type'] == 'A')
otherwise blue when (df['Set'] ...
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How to use Bash to create a folder if it doesn't already exist?
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280
First, in bash "[" is just a command, which expects string "]" as a last argument, so the whit...
Convert Python dictionary to JSON array
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answered Feb 2 '13 at 10:50
kmerenkovkmerenkov
2,60111 gold badge1616 silver badges77 bronze badges
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Plot a bar using matplotlib using a dictionary
...ng the appropriate ticks:
import matplotlib.pyplot as plt
D = {u'Label1':26, u'Label2': 17, u'Label3':30}
plt.bar(range(len(D)), list(D.values()), align='center')
plt.xticks(range(len(D)), list(D.keys()))
# # for python 2.x:
# plt.bar(range(len(D)), D.values(), align='center') # python 2.x
# plt...
How do I list all versions of a gem available at a remote site?
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205
Well, it was easier than I thought (well, not really, let's say as easy as it should be):
gem...
How to detect a loop in a linked list?
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25 Answers
25
Active
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What is the difference between bottom-up and top-down?
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251
rev4: A very eloquent comment by user Sammaron has noted that, perhaps, this answer previou...