Flattening is Happening

Where for art thou romeo

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In this series, I’ll break down a more obvious version of the sample usage for flatten included in the HCL documentation, expanding each concept into chunks you can understand without a ton of trial and error.

We’ll break this up into three parts:

1. How for works in Terraform
2. What flatten is all about
3. Some real life use cases: AWS security group rules, and GCP IAM role membership

Now that we have a plan, let’s get started!

Documentation

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• for
• flatten
• security group rules