[Python-Dev] Retrieve an arbitrary element from a set without removing it
Nick Coghlan
ncoghlan at gmail.com
Wed Oct 28 07:42:40 CET 2009
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Wed Oct 28 07:42:40 CET 2009
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Alexander Belopolsky wrote: > Odd indeed. My first reaction was: it is not needed because lists > support slicing, but when I tried to construct a list.get() using > slicing the best I could come up with was the following hack > >>>> def lget(l, i, v): return (l[i:] or [v])[0] > ... >>>> lget(range(10), 20, 200) > 200 >>>> lget(range(10), 5, 50) > 5 > > Yet for some reason I never missed this functionality ... People tend to do length checks on lists to decide which items are and are not present. You can't do that with a dict. Cheers, Nick. -- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia ---------------------------------------------------------------
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