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When should I use Struct vs. OpenStruct?
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180
With an OpenStruct, you can arbitrarily create attributes. A Struct, on the other hand, must ...
Why does parseInt yield NaN with Array#map?
...of the element.
In this case, you ended up calling parseInt with radix 0, 1 and 2 in turn. The first is the same as not supplying the parameter, so it defaulted based on the input (base 10, in this case). Base 1 is an impossible number base, and 3 is not a valid number in base 2:
parseInt('1', 0...
List of all index & index columns in SQL Server DB
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edited Sep 24 at 2:11
jswolf19
2,2771414 silver badges1515 bronze badges
answered Apr 19 '09 at 1...
How to disassemble one single function using objdump?
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answered Apr 1 '14 at 1:47
Tom TromeyTom Tromey
18.1k3535 silver badges5454 bronze badges
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Add column with constant value to pandas dataframe [duplicate]
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21
The reason this puts NaN into a column is because df.index and the Index of your right-hand-side...
Drop all duplicate rows across multiple columns in Python Pandas
...t pandas as pd
df = pd.DataFrame({"A":["foo", "foo", "foo", "bar"], "B":[0,1,1,1], "C":["A","A","B","A"]})
df.drop_duplicates(subset=['A', 'C'], keep=False)
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Extracting the last n characters from a ruby string
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101
Here you have a one liner, you can put a number greater than the size of the string:
"123".sp...
Boolean vs tinyint(1) for boolean values in MySQL
...atabase for boolean values? I use boolean but my colleague uses tinyint(1) .
6 Answers
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How to randomly sort (scramble) an array in Ruby?
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Built in now:
[1,2,3,4].shuffle => [2, 1, 3, 4]
[1,2,3,4].shuffle => [1, 3, 2, 4]
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