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Given two arrays of integers, how many of the elements in the first array are contained in the second array? The first array will always contain at least one value. countOccurrences([4, 5, 6], [7, 4, 9]) → 1 countOccurrences([4, 5, 6], [4, 6, 5, 4, 6, 5]) → 3 countOccurrences([4, 6, 5, 4, 6, 5], [4, 5, 6]) → 6 ...Save, Compile, Run (ctrl-enter) |
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Difficulty: 300
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