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Get distance between two points in canvas
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211
You can do it with pythagoras theorem
If you have two points (x1, y1) and (x2, y2)
then you c...
How to drop rows of Pandas DataFrame whose value in a certain column is NaN
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12 Answers
12
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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
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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 ...
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'...
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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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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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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