## Map Loop

For e.g, we have the following values:
```hcl
vpc_peering_list = {
  k8s-production = "vpc-111111"
  k8s-service = "vpc-222222"
  k8s-zdata = "vpc-333333" 
}
```
**IMPORTANT** Map follows alphanumeric sequence.

We can loop through this map with:
```hcl
resource "aws_vpc_peering_connection" "vpc_peering" {
  count = "${length(keys(var.vpc_peering_list))}"
  vpc_id = "${element(values(var.vpc_peering_list), count.index)}"
  peer_vpc_id   = "${aws_vpc.vpc.id}"
 
  tags {
    Name = "${element(keys(var.vpc_peering_list), count.index)}-vpc-peering-${var.service_name}"
  }
}
```