Filtering on Java Stream based on Index or last array value modification using lambda

Question

I have array of String like mentioned in code below. I am eliminating double quote present in each element but I have to perform an additional operation on last Index as I know that there is additional double quote.

    String array[] = new String[]{"\"Awesome Systems, Inc. - 357", "\"Awesome Systems, Inc - 357", "\"wpe_stage\""};
    Arrays.stream(array).map((str) -> (str = str.trim())
            .substring(1, str.length()))
            .forEach(System.out::println);

What I am getting is an output like-

   Awesome Systems, Inc. - 357
   Awesome Systems, Inc - 357
   wpe_stage"

The desired output is like-

   Awesome Systems, Inc. - 357
   Awesome Systems, Inc - 357
   wpe_stage

How can I do this using stream functionality or lambda? Is there any way to select last index in stream or any filtering based on index is possible?

Answer 1

You could use replaceAll and replace all instances of the double quote in one go, provided they're either at the start or the end of the element:

Arrays
    .stream(array)
    .map((str) -> (str = str.trim()).replaceAll("^\"|\"$", ""))
    .forEach(System.out::println);

Output

Awesome Systems, Inc. - 357
Awesome Systems, Inc - 357
wpe_stage