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gists/Array combinations as sets
J. Fernando Sánchez 78198af804
2014-02-24 04:09:59 -08:00

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def array_combinations(*args):
combinations = set([frozenset([i]) for i in set(args[0])])
for arg in args[1:]:
tempcomb = []
for i in set(arg):
tempcomb += [frozenset(list(c)+[i]) for c in combinations if i not in c ]
combinations = set(tempcomb)
return [list(comb) for comb in combinations]
res = array_combinations(a,b)
print res
print len(res)