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How does zip(*[iter(s)]*n) work in Python?
...rguments for a function call. Therefore you're passing the same iterator 3 times to zip(), and it pulls an item from the iterator each time.
x = iter([1,2,3,4,5,6,7,8,9])
print zip(x, x, x)
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Add number of days to a date
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This should be
echo date('Y-m-d', strtotime("+30 days"));
strtotime
expects to be given a string containing a US English date format and will try to parse that format into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 UTC), relative ...
Why are dates calculated from January 1st, 1970?
...re any reason behind using date(January 1st, 1970) as default standard for time manipulation? I have seen this standard in Java as well as in Python. These two languages I am aware of. Are there other popular languages which follows the same standard?
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How to only get file name with Linux 'find'?
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-exec and -execdir are slow, xargs is king.
$ alias f='time find /Applications -name "*.app" -type d -maxdepth 5'; \
f -exec basename {} \; | wc -l; \
f -execdir echo {} \; | wc -l; \
f -print0 | xargs -0 -n1 basename | wc -l; \
f -print0 | xargs -0 -n1 -P 8 basename | wc -l; \
f...
sed edit file in place
... @maths: It does, but maybe somewhere else or for a shorter time?
– choroba
Jul 3 '14 at 5:38
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Convert a String In C++ To Upper Case
...racters (mixed lowercase and non-lowercase ASCII), converted in a loop 40M times (with no cross-file inlining, so the compiler can't optimize away or hoist any of it out of the loop). Same source and dest buffers, so no malloc overhead or memory/cache effects: data is hot in L1 cache the whole time...
How do I convert CamelCase into human-readable names in Java?
...s fine, very focus on performance. b) When the conversion is done a lot of times this method is much faster than the regex-based one: this is my benchmark for executing the aforementioned tests 100,000 times: ``` regex-based method took 4820 milliseconds ////////// commons-lang-based method took 23...
Type converting slices of interfaces
...x/costly operations. Converting a string to an interface{} is done in O(1) time. Converting a []string to an interface{} is also done in O(1) time since a slice is still one value. However, converting a []string to an []interface{} is O(n) time because each element of the slice must be converted to ...
Logging uncaught exceptions in Python
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As Ned pointed out, sys.excepthook is invoked every time an exception is raised and uncaught. The practical implication of this is that in your code you can override the default behavior of sys.excepthook to do whatever you want (including using logging.exception).
As a straw...
rreplace - How to replace the last occurrence of an expression in a string?
...ypical string in my program (> 500 characters), your solution was three times faster than Alex's solution and four times faster than Mark's solution. Thanks to all for your answers!
– Barthelemy
Mar 31 '10 at 20:44
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