Removing duplicates from combined list(map(string)) variables

Terraform
1

Hi Folks

In the terraform console(Terraform v1.1.5) I’m wanting to join 2 list(map(string)) variable types removing any duplicates on “name” and keeping the map entry in the var_a in this case but the distinct function doesn’t seem to be doing this. Any ideas on how I can do this please? For example, in the below I would want to strip out the name1 = 1000 map

> var.var_a
tolist([
  tomap({
    "name" = "name1"
    "value" = "2000"
  }),
])
> 

> var.var_b
tolist([
  tomap({
    "name" = "name1"
    "value" = "1000"
  }),
  tomap({
    "name" = "name2"
    "value" = "20"
  }),
  tomap({
    "name" = "name3"
    "value" = "30"
  }),
])
> 

> distinct(concat(var.var_a,var.var_b))
tolist([
  tomap({
    "name" = "name1"
    "value" = "2000"
  }),
  tomap({
    "name" = "name1"
    "value" = "1000"
  }),
  tomap({
    "name" = "name2"
    "value" = "20"
  }),
  tomap({
    "name" = "name3"
    "value" = "30"
  }),
])
2

Ok folks for the people googling in the same situation I think I have this working after seeing this tuples - Terraform : Remove duplicates from map based on value - Stack Overflow

> values(zipmap(concat(var.var_b.*.name,var.var_a.*.name),concat(var.var_b,var.var_a)))
tolist([
  tomap({
    "name" = "name1"
    "value" = "2000"
  }),
  tomap({
    "name" = "name2"
    "value" = "20"
  }),
  tomap({
    "name" = "name3"
    "value" = "30"
  }),
  tomap({
    "name" = "name4"
    "value" = "40"
  }),
])
> 

> var.var_a
tolist([
  tomap({
    "name" = "name1"
    "value" = "2000"
  }),
  tomap({
    "name" = "name4"
    "value" = "40"
  }),
])
> 

> var.var_b
tolist([
  tomap({
    "name" = "name1"
    "value" = "1000"
  }),
  tomap({
    "name" = "name2"
    "value" = "20"
  }),
  tomap({
    "name" = "name3"
    "value" = "30"
  }),
])