On 1 Jul 2007 11:09:40 GMT, Martin Durkin <[EMAIL PROTECTED]> wrote: > Duncan Booth <[EMAIL PROTECTED]> wrote in > news:[EMAIL PROTECTED]: > > > Martin Durkin <[EMAIL PROTECTED]> wrote: > > > >>>>>> def rev(x): > >>> mylist = [] > >>> for char in x: > >>> mylist.append(char) > >>> mylist.reverse() > >>> for letter in mylist: > >>> print letter > >>> > >>> However, compare the incredible difference in clarity and elegance > >>> between that and: > >>> > >>>> >>> print "\n".join("spam"[::-1]) > >>> > >> > >> OK, maybe I'm missing the point here as I'm new to Python. The first > >> one seems clearer to me. What am I missing? > >> > > I think all you are missing is familarity with Python, but I too don't > > like one-liners simply for their own sake. > > > > I guess that's it. The first one reads more like a textbook example which > is about where I am at. Is there any speed benefit from the one liner?
The one line is quite a bit faster: [EMAIL PROTECTED] ~ $ python -m timeit 's = "onomatopoeia"; s = s.join(s[::-1])' 100000 loops, best of 3: 6.24 usec per loop [EMAIL PROTECTED] ~ $ python -m timeit ' > def rev(x): > mylist = [] > for char in x: > mylist.append(char) > mylist.reverse() > return "".join(mylist) > > s = "onomatopoeia" > s = rev(s)' 100000 loops, best of 3: 9.73 usec per loop -- Evan Klitzke <[EMAIL PROTECTED]> -- http://mail.python.org/mailman/listinfo/python-list
