[erlang-questions] Store maps in ets/dets?

Matthias Lang <>
Fri Apr 11 09:21:16 CEST 2014


> On Thu, Apr 10, 2014 at 9:33 AM, Björn-Egil Dahlberg <> wrote:

> > Persistent is used all over to describe Maps as immutable. Though if you
> > have a database background the meaning of "persistent" is of course another.
...

On Thursday, April 10, Michael Loftis wrote:

> and they're most definitely not persistent if they're in-process.

'persistent' means (at least) two different things. Here are the wikipedia
pages on those two different things:

  http://en.wikipedia.org/wiki/Persistence_%28computer_science%29
  http://en.wikipedia.org/wiki/Persistent_data_structure

When you write "[maps] are most definitely not persistent", I think
you're using the first definition. Björn-Egil indicated that he was
using the second.

Matt



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