Terraform unique list

unique-list.tf

locals {
  listA = [1, 2, 3, 4]
  listB = [2, 3, 4, 5]
}

provider "local" {}

resource "local_file" "name" {
  content  = "${join(" ", distinct(concat(local.listA, local.listB)))}"
  filename = "myfile.txt"
}