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It is used for unpacking the list. As per syntax, set.intersection() takes multiple sets as input and gives intersection of all of them as result.
The line gems = set.intersection(*rocks) is equivalent to writing :
gems = set.intersection(rocks[0],rocks[1],...,rocks[N-1]) with "..." replaced by proper values. But, since number of rocks is arbitrary it can't be coded this way.
Thus, * operators makes implementation a lot convenient here. Still, there can be several alternate ways. Statement gems = set.intersection(*rocks) can be replaced by following code :
Gemstones
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It is used for unpacking the list. As per syntax,
set.intersection()takes multiple sets as input and gives intersection of all of them as result.The line
gems = set.intersection(*rocks)is equivalent to writing :gems = set.intersection(rocks[0],rocks[1],...,rocks[N-1])with "..." replaced by proper values. But, since number of rocks is arbitrary it can't be coded this way.Thus, * operators makes implementation a lot convenient here. Still, there can be several alternate ways. Statement
gems = set.intersection(*rocks)can be replaced by following code :