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The Terraform compact() function helps clean up and simplify lists by removing null and empty string elements, which can prevent runtime errors during the apply phase. This function is especially useful in dynamic configurations where conditional expressions may introduce null values. The article by Mariusz Michalowski explains how to use the compact() function effectively in Terraform. It is worth reading because it provides practical insights into handling common issues in Terraform configurations. Readers will learn how to use the compact() function to improve the reliability and clarity of their Terraform code.
Key facts
- The compact() function in Terraform removes null and empty string elements from a list.
- It is part of Terraform’s standard library and is useful for handling dynamic expressions with null values.
- The function only filters out null and empty strings, not other falsy values like false or 0.
- It helps prevent validation errors during the apply phase by ensuring only valid elements are included.
- The function is especially beneficial when working with conditional logic or user inputs.
