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How do I set a variable to the output of a command in Bash?
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14 Answers
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Python using enumerate inside list comprehension
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167
Try this:
[(i, j) for i, j in enumerate(mylist)]
You need to put i,j inside a tuple for the...
Get last result in interactive Python shell
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Underscore.
>>> 5+5
10
>>> _
10
>>> _ + 5
15
>>> _
15
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Implications of foldr vs. foldl (or foldl')
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175
The recursion for foldr f x ys where ys = [y1,y2,...,yk] looks like
f y1 (f y2 (... (f yk x) ...
How to get the last element of an array in Ruby?
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Use -1 index (negative indices count backward from the end of the array):
a[-1] # => 5
b[-1] # => 6
or Array#last method:
a.last # => 5
b.last # => 6
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What does the git index contain EXACTLY?
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163
The Git book contains an article on what an index includes:
The index is a binary file (gener...
namedtuple and default values for optional keyword arguments
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21 Answers
21
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Big-O for Eight Year Olds? [duplicate]
...und what they mean conceptually. For example, if one were to perform an O(1) operation on a data structure, I understand that the number of operations it has to perform won't grow because there are more items. And an O(n) operation would mean that you would perform a set of operations on each elem...