On Tuesday 10 January 2017 00:12, Antoon Pardon wrote: > Op 09-01-17 om 04:53 schreef Steven D'Aprano: >> Suppose you have an expensive calculation that gets used two or more times >> in a loop. The obvious way to avoid calculating it twice in an ordinary loop >> is with a temporary variable: [...] >> I can't decide whether that's an awesome trick or a horrible hack... > > Maybe this in an occasion to use your recipe. > > http://code.activestate.com/recipes/580625-collection-pipeline-in-python/ > > result = data | Map(expensive_calculation) | Map(lambda tmp: (tmp, tmp + 1)) > | List >
Indeed :-) -- Steven "Ever since I learned about confirmation bias, I've been seeing it everywhere." - Jon Ronson -- https://mail.python.org/mailman/listinfo/python-list
