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Find the missing element from the given 2 arrays, second array is duplicate?

–1 vote
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Say you are given two arrays where second array is duplicate with one missing element. What should be the best possible way to find that missing element -
array1: [1,2,3,4,5,6,7]
array2: [1,3,4,5,6,7]

Missing Element: 2

posted May 9, 2016 by anonymous

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1 Answer

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Here is a quick tip to solve this programming question: put the elements of the second array in the Hashtable and for every element of the first array, check whether it’s present in the hash or not, O/P all those elements from the first array that are not present in the hash table

answer May 12, 2016 by Hasan Raza
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