IS\_EQUAL
function.UNION(numbers1, numbers2)
[10,55,66,54,85,91,52,94]
UNION(numbers2, numbers1)
[52,55,85,10,94,66,54,91]
UNION(array1, array2)
[{"name":"Kate","age":30},{"name":"Jack","age":32},{"name":"Kate","age":25},{"name":"Jane","age":22},{"name":"Jon","age":32}]