Terraform loops
From wikinotes
[for s in var.list : upper(s)] # .map() list items
[for k, v in var.map : length(k) + length(v)] # .map() mapping items
[for s in var.list : upper(s) if s != ""] # .filter() items
[for s in var.list : upper(s)] # .map() list items
[for k, v in var.map : length(k) + length(v)] # .map() mapping items
[for s in var.list : upper(s) if s != ""] # .filter() items