Specify an argument for one resource create by a loop - Terraform

Question

It's possible to use a variable to add a non-default argument for a resource that is being created with a count loop?

For example:

resource "resource" "example" {
   count = length(var.resources)
   name = var.resources[count.index]
}

Where var.resources is:

["X", "Y", ...]

And now, I have the necessity to add and specific argument for one of this resources.

Resource "Y" will need a specific argument like " description = example"

It's possible? which is the best option? Use for_each instead of count and map var?

Answer 1

You could reorganize your var.resources into a map:

variable "resources" {
  default = {
       "X" = {}
       "Y" = {description = "x description"}
  } 
}

then:

resource "resource" "example" {
   for_each    = var.resources
   name        = each.key
   description = lookup(each.value, "description", null)
}