Mismatch Array
ARRAY

Problem

Given an array nums containing n numbers taken from the range 1 to n, it is known that one number from the set {1, 2, ..., n} is missing and one number appears twice in nums.

Return these two numbers in the form of an array.

Examples

findErrorNums([5, 3, 2, 7, 6, 6, 1, 4]) // returns [6, 8] // The number 6 is duplicated and the item 8 is missing. findErrorNums([2, 3, 3, 4, 5, 6, 7, 8, 9, 10]) // returns [3, 1] // The number represented by 3 appears twice // while the item 1 is absent.
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