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if I have a list of aws account outputs and want to map that to an array of account IDs, is `pulumi.all` the right way to do that?

if it's only 1 variable of type `pulumi.Output&lt;awsAccounts&gt;[]` then I think you can simply psuedo-js-code
```const awsAccounts = Pulumi.Output&lt;aswAccounts&gt;[]
const accountIds = awsAccounts.map(account =&gt; account.apply(val =&gt; val.id))```
idk if it's "right way to do it"

but it still would be a list of `pulumi.Output&lt;ids&gt;`

im trying to put it in an input that has type `string[]` but cannot figure out how to accomplish that and keep typescript happy

`const sourceIds = pulumi.all([account, otherAccount]).apply(accounts =&gt; accounts.map(a =&gt; a.id.get())).get()` makes the compiler happy but still need to do a test run, it seems like there should be a simpler way to do that

oh wait `.get()` says : This function is only callable in code that runs in the cloud post-deployment.
```This function is only callable in code that runs in the cloud post-deployment. At this point all Output values will be known and can be safely retrieved. During pulumi deployment or preview execution this must not be called```

using the value inside the `.apply()` has worked for me in the past, but I feel that it isn't a good pattern. None of it will show in preview

lmk if you figure something out! I have struggled with getting value out of outputs too.

if you have 3 pulumi Output&lt;string&gt; variables var1, var2, and var3, then pulumi.all([var1, var2, var3]) will return an Output&lt;any[]&gt;. You can then cast that return value to an Output&lt;string[]&gt;, and within later apply() calls TypeScript will treat the value as a string[] type containing the 3 strings from var1, var2, and var3.
Outside of apply(), all(), and similar pulumi methods, pulumi Output types cannot be "unwrapped".

So if you want to take 3 separate pulumi Outputs and compose them together into 1 pulumi Output, then utilize the values in that Output, pulumi.all followed by pulumi.apply is the most natural choice. Within the apply, the value will be of type string[] (as long as you cast the type as described above).

Thanks <@URRQ01WR3> looks like im still missing something though