CodingBat add

add

Given an array of Strings, a String element, and an index, return an array with the element inserted in the array at the index.

If the index is out of bounds, return the array unchanged.

add(["0", "1", "2", "3", "4"], "-1", 2) → ["0", "1", "-1", "2", "3", "4"]
add(["A", "B", "C", "D"], "*", -1) → ["A", "B", "C", "D"]
add(["A", "B", "C", "D"], "*", 0) → ["*", "A", "B", "C", "D"]

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