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Article #6985

Erlang (was: end of GEL...) (was: Telescript ...)

#6985
From: Joe Armstrong
Date: Mon, 28 Nov 1994 10:35
76 lines
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|> > Now, I've used Erlang for about a year. I've seen it's pros and
|> > cons. The claims where basically true. Maybe I haven't increased by
|> > productivity by 10 times, but then, maybe I was not that bad as a
|> > C/C++ programmer either.

    Our claim  is 7 times less code  than C++ --  this  is based  on a
large number of programs.

    Also note that  the largest Erlang  application  now weighs in  at
460,000 lines of  code (which if our factor  of 7 is correct for large
programs represents 3.2 Million lines of C++)

<aside> We will never know if the factor 7 is valid for large programs
since comparison experiments are (for obvious reasons) only done on
small programs </aside>

|> 
|> > Now, I think I've said enough. If anyone wants to know more, take a
|> > look at the Erlang web, http://www-cslab.ericsson.se:5000
|> 
|> Unfortunately:
|> 
|> : Academic Erlang
|> 

	(is free ... details of how to get it deleted ...)

   But is this really unfortunate? - Universities etc. get Erlang free.
But that's not much good if you want to make products. For product development
"Erlang Systems" sells fully supported commercial versions of Erlang. The
commercial version of Erlang is significantly faster than the academic version
and full support is offered.

   Change of thread to Telescript ....

>> Does anyone know of a book or other reference work describing the
>> telescript language ?

>> Joe Mansigian

   *Only* the White paper from General Magic. Correct me if I'm wrong.

    I have yet to see *any* published  description of Telescript which
gives enough details to allow someone to implement it!

    There are  a *lot* of   articles in the  computer  press - but  no
details - how can all these journalists write favorable articles about
something who details have not been seen?

    Actually   the  ideas in  the     Telescript  white paper   *were*
interesting.  We were able  to write (in Erlang)  an interpretor for a
language  with what  we  thought had  Telescript-like  semantics in  a
couple  of hours. (conclusion. Erlang is  ideal for experimenting with
agent like languages!!)

    <aside> Erlang is not  only a concurrent language  for programming
fault-tolerent "soft" real-time   applications - it also  has built-in
cross-platform distribution (i.e.   it's  easy to set up  co-ordinated
computations  on a number of differents  machine - in  the lab we have
applications running on Windows-NT, QNX, SunOS, HP, AIX  - the host OS
is largely  irellevant - the applications   run transparently on these
operating  systems  - without  any  knowledge of  the underlying  OS's
</aside>

    I *have* seen  things which  in  Telescript  which  I don't  fully
understand.   To be  secure Telescript   needs   some strong  form  of
encription -- if I'm going to pay my bills electronically I don't want
weak encrytion methods being used.

    Thus  telescript must have some  form  of strong  encryption - but
(the  sting in the tail)  this will cause  export problems from the US
and make it very  difficult for Telescript  to become an international
standard (which the General Magic people want).

    Joe Armstrong
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References: <1994Nov9.081144.28328@math.ucla.edu> <BENJY.94Nov9112654@blackjack.ai.mit.edu> <NEERI.94Nov10113047@yggdrasil.ethz.ch> <1994Nov13.020620.19269@math.ucla.edu> <3a78ts$65m@bognor.barclays.co.uk> <VDEMARCO.94Nov14163622@whatnow> <3ahlbt$9nv@einls1c217.ericsson.se> <BRUCE.94Nov23111224@iasc3.scm.liv.ac.uk>

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From: joe@erix.ericsson.se (Joe Armstrong)
Newsgroups: comp.lang.misc,gnu.misc.discuss
Subject: Erlang (was: end of GEL...) (was: Telescript ...)
Date: 28 Nov 1994 10:35:10 GMT
Organization: Ellemtel Telecom Systems Labs, Stockholm, Sweden
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References: <1994Nov9.081144.28328@math.ucla.edu> <BENJY.94Nov9112654@blackjack.ai.mit.edu>  <NEERI.94Nov10113047@yggdrasil.ethz.ch>  <1994Nov13.020620.19269@math.ucla.edu>  <3a78ts$65m@bognor.barclays.co.uk> <VDEMARCO.94Nov14163622@whatnow>  <3ahlbt$9nv@einls1c217.ericsson.se> <BRUCE.94Nov23111224@iasc3.scm.liv.ac.uk>
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