I want to filter an arraylist indexes and filter a doc based on the docid I provide.

The below code works for 0th index but cant search the whole list and findout the docid

  var results =
this._items?.userItems?.filter { it -> it.requests.get(0).doc == docid }

Kindly suggest the better way of doing It.

Any help is highly appreciated

Thanks

CodePudding user response：

Assuming that you want to keep only the userItems that have any request with the given docid, you can use it.requests.any { request -> request.doc == docid }.

From the documentation (see the overload that takes in a predicate):

Returns true if at least one entry matches the given predicate.

If you want to get all the requests with the given docid instead, you can use: userItems.flatMap { it.requests }.filter { it.doc == docid }