Computers and Technology, 20.06.2020 00:57 123iamthe1
This method determines if one int array is a permutation of another int array. "A permutation, also called an "arrangement number" or "order " is a rearrangement of the elements of an ordered list S into a one-to-one correspondence with S itself." [mathworld. wolfram] For example the list {1, 2} has the following permutations; {1, 2} and {2, 1}. Note the elements of listA and listB are lists, not sets, so duplicate items could appear. So for example given the list {1, 2, 2} the unique permutations are {1, 2, 2}, {2, 1, 2}, and {2, 2, 1}. {2, 1} is not a permutation of {1, 2, 2}., Another example of lists that are not permutations of each other: {2, 1, 1} is not a permutation of {2, 2, 1}. /* Determine if aData is a permutation of bData. pre: aData != null, bData != null post: return true if aData is a permutation of bData, false otherwise. Neither aData or bData are altered as a result of this method. */ public static boolean isPermutation(int[] aData, int[] bData) Hint: Do not try to solve the problem by taking one the arrays and generating all the permutations of that array and then check to see if the other array is one of those permutations. That is too inefficient except for arrays of a trivial length.
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This method determines if one int array is a permutation of another int array. "A permutation, also...
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