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Computational complexity of Fibonacci Sequence
...is asymptotically O(2n). You can then prove your conjecture by induction.
Base: n = 1 is obvious
Assume T(n-1) = O(2n-1), therefore
T(n) = T(n-1) + T(n-2) + O(1) which is equal to
T(n) = O(2n-1) + O(2n-2) + O(1) = O(2n)
However, as noted in a comment, this is not the tight bound. An interestin...
What's the fastest way to delete a large folder in Windows?
...r /s/q foldername
This is nearly three times faster than a single rmdir, based on time tests with a Windows XP encrypted disk, deleting ~30GB/1,000,000 files/15,000 folders: rmdir takes ~2.5 hours, del+rmdir takes ~53 minutes. More info at Super User.
This is a regular task for me, so I usually ...
Using Django time/date widgets in custom form
...css"/>
<link rel="stylesheet" type="text/css" href="/media/admin/css/base.css"/>
<link rel="stylesheet" type="text/css" href="/media/admin/css/global.css"/>
<link rel="stylesheet" type="text/css" href="/media/admin/css/widgets.css"/>
This implies that Django's admin media (AD...
Random number generator only generating one random number
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@Florin - there is no difference re "stack based" between the two. Static fields are just as much "external state", and will absolutely be shared between callers. With instances, there is a good chance that different threads have different instances (a common pattern)...
Create an empty list in python with certain size
...ect. So unless you simply want 10 copies of the same object, use the range based variant as it creates 10 new objects. I found this distinction very important.
– Mandeep Sandhu
Apr 23 '18 at 18:29
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How to check command line parameter in “.bat” file?
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Look at http://ss64.com/nt/if.html for an answer; the command is IF [%1]==[] GOTO NO_ARGUMENT or similar.
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Cannot change version of project facet Dynamic Web Module to 3.0?
... I also had to do this. I was using a Spring web project with a Java-based configuration, so updating a web.xml wasn't possible for me.
– bcody
Apr 6 '14 at 13:12
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Flattening a shallow list in Python [duplicate]
...Lott: You inspired me to write a timeit app.
I figured it would also vary based on the number of partitions (number of iterators within the container list) -- your comment didn't mention how many partitions there were of the thirty items. This plot is flattening a thousand items in every run, with ...
Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?
...that the address of the array was saved in a register so it could optimize based upon that, but the debugger simply knew the address of a constant. Thus, before a statement MyArray[0] = 4; I could check the adddress of MyArray, and look at that location before and after the statement executed; it w...
Determine device (iPhone, iPod Touch) with iOS
...Rosenfield
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