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From: Eric Sosman <esosman@comcast-dot-net.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: "null", polymorphism and TCO
Date: Sun, 08 Feb 2015 15:03:56 -0500
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On 2/8/2015 1:16 PM, Stefan Ram wrote:
>    A book said that one needed null to mark the end of a linked
>    list:
> [...]
>    Neither null nor java.util.Optional is needed when one
>    is using polymorphism, i.e., real OOP. We just need to say
>    that an entry with a next entry is a different type than
>    an entry without a next entry. No »null«, no »Optional«,
>    just polymorphism!
> [...]

     When I was a young lad and learning my first programming
language (FORTRAN II; "young" was long ago for me), I figured
out how to write a counted loop using a "computed GOTO" instead
of a "DO".  Thus I proved my own great cleverness.

     ISTM your idea is similarly clever -- and similarly useless.

-- 
esosman@comcast-dot-net.invalid
"Don't be afraid of work. Make work afraid of you." -- TLM