function nth(array, n) {
      return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
    }
Gets the element at index `n` of `array`. If `n` is negative, the nth
element from the end is returned.

@static
@memberOf _
@since 4.11.0
@category Array
@param {Array} array The array to query.
@param {number} [n=0] The index of the element to return.
@returns {*} Returns the nth element of `array`.
@example

var array = ['a', 'b', 'c', 'd'];

_.nth(array, 1);
// => 'b'

_.nth(array, -2);
// => 'c';