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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 |
| Organization | A noiseless patient Spider |
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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
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Re: "null", polymorphism and TCO Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-02-08 15:03 -0500
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