
AWS CloudFormation introduces Fn::ForEach looping and Fn::FindInMap enhancements via language extensions, enabling developers to create more maintainable and concise infrastructure templates with reduced code duplication.


<div><p>This article explores two new enhancements to AWS CloudFormation's language extensions: Fn::FindInMap enhancements and the new Fn::ForEach looping function.</p><ul><li>Fn::FindInMap now supports optional default values for missing mapping keys</li><li>Fn::FindInMap parameters can use additional intrinsic functions like Fn::Split and Fn::Select</li><li>Fn::ForEach enables native looping to create multiple similar resources without repetition</li><li>Fn::ForEach syntax requires a logical ID, variable name, collection, and template section</li><li>Loops can be nested and used in Resources, Outputs, and other template sections</li><li>Requires AWS::LanguageExtensions transform declaration in CloudFormation templates</li><li>Simplifies template maintenance by reducing code duplication for repetitive configurations</li></ul><p>These language extensions enable more concise, maintainable CloudFormation templates through dynamic value lookups and native looping capabilities.</p></div>


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