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Run cron job only if it isn't already running
...on job as a sort of watchdog for a daemon that I've created. If the daemon errors out and fails, I want the cron job to periodically restart it... I'm not sure how possible this is, but I read through a couple of cron tutorials and couldn't find anything that would do what I'm looking for...
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Converting Dictionary to List? [duplicate]
...ied to access the list resulting from dictlist=dict.items(), I then got an error trying to access it like a list: dictlist[i][1]. Python3 doc says: ~~~~ "The objects returned by dict.keys(), dict.values() and dict.items() are view objects. They provide a dynamic view on the dictionary’s entries, ...
Why are Oracle table/column/index names limited to 30 characters?
...RRM which is limited to 255 characters, and which most clients use to make errors visible. I suspect increasing the allowable size of constraint names significantly would impact the ability to report on the violations (especially where a constraint violation has been bubbled up through a few layers ...
List comprehension on a nested list?
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answered Aug 6 '13 at 6:05
Andrew ClarkAndrew Clark
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How to get all subsets of a set? (powerset)
...3,) (1,2) (1,3) (2,3) (1,2,3)"
s = list(iterable)
return chain.from_iterable(combinations(s, r) for r in range(len(s)+1))
Output:
>>> list(powerset("abcd"))
[(), ('a',), ('b',), ('c',), ('d',), ('a', 'b'), ('a', 'c'), ('a', 'd'), ('b', 'c'), ('b', 'd'), ('c', 'd'), ('a', 'b', 'c'...
Iterating over every two elements in a list
...ad a list that had not even amount of numbers in it, it would get an index error. Solved it with a try: except:
– Hans de Jong
Oct 20 '14 at 9:39
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how to calculate binary search complexity
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Two answers - First one here: Even if there is no error in the math, we can see that 2.43 average is still better than 3.5 average for linear, and this is at a low value. Once you get into the 100s of entries, log2() is much much better than linear. I think you see this ...
How to increase the vertical split window size in Vim
... be pressed
– freeo
Dec 19 '14 at 1:05
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pandas resample documentation
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edited May 31 '19 at 10:05
answered Jun 8 '13 at 16:20
Ma...
Add an element to an array in Swift
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Error: Value of type 'Array<Element>' has no member 'appendContentsOf'
– Dani Kemper
Oct 17 '18 at 22:55
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