Francis Girard wrote: > This is a prefect use case for the good old "reduce" function: > > --BEGIN SNAP > > a_lst = [None,0,0,1,1,1,2,2,3,3,3,2,2,2,4,4,4,5] > > def straightforward_collapse(lst): > return reduce(lambda v,e: v[-1]!=e and v+[e] or v, lst[1:], [lst[0]]) reduce() magically increases the number of function calls by len(a_list). There will be no good use cases for reduce() until Python can inline functions.
Apodictically Yours Peter -- http://mail.python.org/mailman/listinfo/python-list
