CodingBat insertMiddle

insertMiddle

Given an int array with even number of elements, return a new array that is formed by inserting the number 999 to the middle of the original array. For example, {0, 1, 2, 3} -> {0, 1, 999, 2, 3}

insertMiddle([0, 1, 2, 3, 4, 5, 6, 7]) → [0, 1, 2, 3, 999, 4, 5, 6, 7]
insertMiddle([100, 34]) → [100, 999, 34]
insertMiddle([-2, 4, 8, 32, 16, 1]) → [-2, 4, 8, 999, 32, 16, 1]

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