SimpleAD and CDK: How to reference IP addresses?

Question

A SimpleAD has two IP addresses. We want to set up two A-records in a hosted zone that point to those IP addresses.  
  
In the A-record code we tried this (simpleAD is the constructed SimpleAD):  
  
   target: route53.RecordTarget.fromIpAddresses(simpleAd.attrDnsIpAddresses\[0], simpleAd.attrDnsIpAddresses\[1]),  
  
.. but got "Error: Resolution error: Resolution error: Cannot add elements to list token, got: #{Token\[TOKEN.163]},.."  
  
We tried adding a dependency (aRecord is the constructed A-record):  
  
   aRecord.node.addDependency(simpleAd) ;  
  
... but no change.  
  
So how do we refer to those addresses in a way that lets them be used in the A-record construction?  
  
Any ideas gratefully accepted.  
  
Regards, K.

Answer

With the help of this post:

I ended up with this (working) solution:  
  
      target: route53.RecordTarget.fromIpAddresses(  
        cdk.Fn.select(0, simpleAd.attrDnsIpAddresses),  
        cdk.Fn.select(1, simpleAd.attrDnsIpAddresses),  
      ),  
  
Thanks, K.

SimpleAD and CDK: How to reference IP addresses?

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