Hi Apologies if answered before but how would I go about mer

Question

Hi Apologies if answered before but how would I go about merging concating two promise output instance arrays i e ```const ids Promise lt pulumi Output lt string gt gt const otherIds Promise lt pulumi Output lt string gt gt ids concat otherIds ``` I ve tried with `then` and also `apply` like `pulumi output ids apply ` etc To no avail Any help would be greatly appreciated pray

little-cartoon-10569 · Answer

A useful trick here is to note that outputs lift or unwrap themselves automatically so you can get rid of the Promise like this ```const ids Promise lt pulumi Output lt string gt gt const outputIds = pulumi output ids ``` Unfortunately the strong type system means you can t unwrap at declaration time `outputIds` is technically of type `pulumi Output lt Promise lt pulumi Output lt string gt gt gt ` But you can use it as if it was of type `pulumi Output lt string gt ` due to the unwrapping

little-cartoon-10569 · Answer

You can use the trick to concat the arrays thus ```const ids Promise lt pulumi Output lt string gt gt const otherIds Promise lt pulumi Output lt string gt gt const concattedIds = pulumi all pulumi output ids pulumi output otherIds ```

little-cartoon-10569 · Answer

You don t even need to use `apply` If you followed the example in the docs for `all ` you d have this ```const concattedIds = pulumi all pulumi output ids pulumi output otherIds apply x y = gt x concat y ``` But that s pretty much exactly what `pulumi all ` does anyway so you can skip that bit

witty-monitor-18849 · Answer

Morning < little cartoon 10569> Thank you so much for the explanation I was unawares of `pulumi all` too Your advice worked a treat thumbsup pray

witty-monitor-18849 · Answer

I was also able to make progress on another component I m developing ```const sourceStage pulumi Input lt pulumi Input lt inputs codepipeline PipelineStage gt gt = name Source actions name Source category Source owner AWS provider CodeStarSourceConnection outputArtifacts source output version 1 configuration ConnectionArn connection arn FullRepositoryId org repo BranchName main OutputArtifactFormat CODEBUILD CLONE REF const pipelineStagesArg pulumi Input lt pulumi Input lt inputs codepipeline PipelineStage gt gt const stages = pulumi all pipelineStagesArg sourceStage apply args sourceStage = gt sourceStage concat args ```

witty-monitor-18849 · Answer

Which also worked

witty-monitor-18849 · Answer

Again thank you pray