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ok thanks, so it does appear to be type related… i’ll give that a shot

public readonly subnetMappings: pulumi.Output&lt;{ allocationId?: string, subnetId: string }[]&gt;;

i guess vpc.getOutput().apply(x =&gt; ({ subnetId: x }))

oh it wont actually fix it i just mean it would remove the erroneous no-error-for-type-mismatch caused by the &lt;any&gt;

all this type stuff is definitely not my strength.. started in on TS when I found out python wasn’t quite there yet (few months ago)

i feel like this shouldn’t be so tough.. trying to do `apply()` but nothing seems to be valid syntax

ok well i've not used stack references myself but if you do e.g. ```var subnets = &lt;pulumi.Output&lt;string[]&gt;&gt;vpc.getOutput(`blah`); ```

it will at least let typescript / your IDE know its type so it can start giving you sensible error messages

and then i'd expect ```subnetMappings: subnets.apply(x =&gt; ({ subNetId: x })), ``` to work

ok great, thanks.. yea that’s more advanced on the typing side than anything I’ve done yet.. appreciate the example

i got it to take this (hard coded): ```    subnetMappings: [
        {subnetId: "subnet-00c7ed0ec22cb3ce4"},
        {subnetId: "subnet-04327ab075a2ae3b3"}
    ],``` as a test

are you using an IDE? vscode gives good type help for stuff like this

i think its more of i just havent wrapped my head around it all yet

(as far as the type stuff) coming from python

oh no i'm ignoring the array part of it i think my example's wrong

```subnetMappings: subnets.apply(x =&gt; x.map(y =&gt; ({ subnetId: y }))), ```

yea that works heh, i’ll have to look into the apply/map bit some more to make sure I fully understand it