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docs: Add Sub function example to pseudo parameters doc. #8885

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merged 2 commits into from Feb 4, 2021
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docs: Add Sub function example to pseudo parameters doc. #8885

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Add Sub function example to Pseudo Parameters doc.
walery Feb 3, 2021
c3ff60d
Enhance Pseudo Parameters examples in aws doc.
walery Feb 4, 2021
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9 changes: 9 additions & 0 deletions docs/providers/aws/guide/variables.md
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Expand Up @@ -675,6 +675,15 @@ Resources:
- 'log-group:/aws/lambda/*:*:*'
```

You can also directly use the [Sub] function:

```yml
Resources:
- !Sub arn:aws:logs:${AWS::Region}:${AWS::AccountId}:log-group:/aws/lambda/*:*:*'
```

[sub]: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-sub.html

## Read String Variable Values as Boolean Values

In some cases, a parameter expect a `true` or `false` boolean value. If you are using a variable to define the value, it may return as a string (e.g. when using SSM variables) and thus return a `"true"` or `"false"` string value.
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