function initial(array) {
	      var length = array == null ? 0 : array.length;
	      return length ? baseSlice(array, 0, -1) : [];
	    }
Creates an array of unique values that are included in all given arrays
using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
for equality comparisons. The order and references of result values are
determined by the first array.

@static
@memberOf _
@since 0.1.0
@category Array
@param {...Array} [arrays] The arrays to inspect.
@returns {Array} Returns the new array of intersecting values.
@example

_.intersection([2, 1], [2, 3]);
// => [2]