Groups | Search | Server Info | Login | Register

Groups > comp.lang.lisp > #60784

Make a random-state from a non-random source

Path csiph.com!eternal-september.org!feeder.eternal-september.org!nntp.eternal-september.org!.POSTED!not-for-mail
From Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups comp.lang.lisp
Subject Make a random-state from a non-random source
Date Mon, 04 May 2026 12:46:57 -0400
Organization A noiseless patient Spider
Lines 14
Message-ID <jwvmryfku8t.fsf-monnier+comp.lang.lisp@gnu.org> (permalink)
MIME-Version 1.0
Content-Type text/plain
Injection-Date Tue, 05 May 2026 03:20:32 +0000 (UTC)
Injection-Info dont-email.me; logging-data="165555"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19jxTUB4sZ4LTdtd6O2H+4+/yiKxCTMxaM="; posting-host="744367fc72a9769abf9209e575164c40"
User-Agent Gnus/5.13 (Gnus v5.13)
Cancel-Lock sha1:yp79DrVRHKmrG5nJ4DfmkFty9vY= sha1:oAPA9BtS4UoghEP7FkaMIPPfVtE= sha256:AQHSRaSEETc60SW/MqmOfoOxEauIXnyservyxEcRALo= sha1:oHTJjcpC2L9ZXSCwOvmWQovqrCU=
Xref csiph.com comp.lang.lisp:60784

Show key headers only | View raw

Reading the CLHS about `make-random-state` I can't see how to create
a "deterministic" random state.

I want it to be deterministic in the sense that if I re-run my program
(including after changing it a bit), I'll get the exact same sequence of
random numbers.
It's OK if the sequence is different when run on a different Lisp
implementation, OTOH.

I guess I could print a random state into a file and then read it back in,
but that depends on internals, so it's doubly messy.


=== Stefan

Back to comp.lang.lisp | Previous | Next — Next in thread | Find similar

Thread

Make a random-state from a non-random source Stefan Monnier <monnier@iro.umontreal.ca> - 2026-05-04 12:46 -0400
  Re: Make a random-state from a non-random source Alan Bawden <alan@csail.mit.edu> - 2026-05-05 00:45 -0400
    Re: Make a random-state from a non-random source Stefan Monnier <monnier@iro.umontreal.ca> - 2026-05-05 16:03 -0400
  Re: Make a random-state from a non-random source tfb <no_email@invalid.invalid> - 2026-05-09 18:20 +0000
    Re: Make a random-state from a non-random source Stefan Monnier <monnier@iro.umontreal.ca> - 2026-05-11 11:23 -0400

csiph-web