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scp (secure copy) to ec2 instance without password
I have an EC2 instance running (FreeBSD 9 AMI ami-8cce3fe5), and I can ssh into it using my amazon-created key file without password prompt, no problem.
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How to drop rows of Pandas DataFrame whose value in a certain column is NaN
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12 Answers
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get list from pandas dataframe column
...st it with list(x).
import pandas as pd
data_dict = {'one': pd.Series([1, 2, 3], index=['a', 'b', 'c']),
'two': pd.Series([1, 2, 3, 4], index=['a', 'b', 'c', 'd'])}
df = pd.DataFrame(data_dict)
print(f"DataFrame:\n{df}\n")
print(f"column types:\n{df.dtypes}")
col_one_list = df['one'...
Numpy - add row to array
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122
What is X? If it is a 2D-array, how can you then compare its row to a number: i < 3?
EDIT a...
How do I declare and initialize an array in Java?
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28 Answers
28
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How to check if hex color is “too black”?
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227
You have to extract the three RGB components individually, and then use a standard formula to ...
The $.param( ) inverse function in JavaScript / jQuery
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62
You should use jQuery BBQ's deparam function. It's well-tested and documented.
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finding and replacing elements in a list
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266
>>> a= [1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1]
>>> for n, i in enumerate(a):
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Elegant way to invert a map in Scala
... values are unique, this works:
(Map() ++ origMap.map(_.swap))
On Scala 2.8, however, it's easier:
origMap.map(_.swap)
Being able to do that is part of the reason why Scala 2.8 has a new collection library.
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