How to pass in Streams Prev element result to next one

Question

I have List of items where on each item I need to create some calculation. Each calculation is built by the preceding element.

So for example:

List<Object> Users=new ArrayList<>();
users.stream().filter(element->calculateSomething(<need-prev-element-input>).findFirst();

The calculateSomething will return true/false depends on the prev element calculation result in the stream

Any idea how can I do that?

Answer 1

Streams are not designed to be able to do any operation like this. You might be able to hack something together to do that, but it'll be awful; you should go back to using normal loops instead.