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bool operator ++ and --
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91
It comes from the history of using integer values as booleans.
If x is an int, but I am using it...
R - Concatenate two dataframes?
...ine adds column b to data frame b.
Results
> a <- data.frame(a=c(0,1,2), b=c(3,4,5), c=c(6,7,8))
> a
a b c
1 0 3 6
2 1 4 7
3 2 5 8
> b <- data.frame(a=c(9,10,11), c=c(12,13,14))
> b
a c
1 9 12
2 10 13
3 11 14
> b$b <- NA
> b
a c b
1 9 12 NA
2 10 13 NA
3 11 1...
python assert with and without parenthesis
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130
The last assert would have given you a warning (SyntaxWarning: assertion is always true, perha...
Using python's eval() vs. ast.literal_eval()?
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193
datamap = eval(raw_input('Provide some data here: ')) means that you actually evaluate the cod...
How to identify server IP address in PHP
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15 Answers
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Simulator error FBSSystemServiceDomain code 4
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edited Dec 1 '14 at 11:23
Umar Farooq
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Is there a JavaScript function that can pad a string to get to a determined length?
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Size of character ('a') in C/C++
... the size of character in C and C++ ? As far as I know the size of char is 1 byte in both C and C++.
4 Answers
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Turn Pandas Multi-Index into column
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197
The reset_index() is a pandas DataFrame method that will transfer index values into the DataFr...
How to convert a string or integer to binary in Ruby?
...a string representing the number in the base specified:
9.to_s(2) #=> "1001"
while the reverse is obtained with String#to_i(base):
"1001".to_i(2) #=> 9
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