> Four years ago I hand-wrote a nested for loop - four levels deep, tagging subnets across regions and availability zones in another AWS account - and it took me about an hour to get the syntax right

I do believe this kind of engineer requires AI. I also hope I don't have to work in the same teams as them. Seasoning teaches you to make changes in other parts of the codebase rather than do this kind of data mangling on local variables, which is incredibly hard to troubleshoot and very brittle - not to mention it's a nightmare to read back and understand.

It is Terraform’s configuration language. Locals mean something specific : non-exported variables. Constructing the map or whatever prior to plan phase is pretty idiomatic. Note the key in the map is a string concatenation. Not something you would do elsewhere but a constraint of that framework.

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