Flattens an arbitrarily nested array of Type into a flat array of Type, e.g. [[1,2,[3]],4] -> [1,2,3,4].

Currently only the int type is supported via the flatten.Int function. Additional types may be supported in the future.

func Int([]interface{}) ([]int, error)

input := []interface{}{
  []interface{}{
    1,
    2,
    []interface{}{
      3,
    },
  },
  4,
}

ints := flatten.Int(input)
fmt.Println(ints) // [1 2 3 4]