On Monday, September 19, 2016 at 10:03:14 AM UTC-5, R.I. Pienaar wrote: > > > > On 19 Sep 2016, at 15:31, jcbollinger <john.bo...@stjude.org <javascript:>> > wrote: > I see a difference between 3.8 and 4.6 with respect to the result of > interpolating an array into a string. In Puppet 3 (and earlier) you get a > concatenation of the stringifications of all the elements, whereas in > Puppet 4, you get a more formatted representation. I would have expected > such a change to be applied during a major version update -- so between 3.x > and 4.0 -- but a quick browse of the release notes does not appear to > mention it. > > This is not a puppet behaviour change. Newer Ruby does nicer looking to_s > on arrays that's why > >
I'm prepared to believe that there's no Puppet code change, which would explain why it's not documented in any release notes, but there's certainly an observable behavior difference between the two example runs. If that is not to be accounted a Puppet behavior change then I suppose it must also be observable with (only) Puppet 3.8 running on different Ruby versions. That's a nice gotcha if you happen to rely on interpolating arrays (not that I would recommend doing so in any case). On the other hand, I observe that the current (4.6) Puppet docs document the array interpolation format <https://docs.puppet.com/puppet/4.6/reference/lang_data_string.html#conversion-of-interpolated-values>, independent of underlying Ruby. That may now be a distinction without much practical difference, but it's the right thing to do: details of the infrastructure -- and especially changes to them -- ought not to leak out into Puppet's user-facing behavior. This sort of thing will become more important as Puppet continues its movement away from Ruby as the main implementation language. In any case, inasmuch as the OP was asking about behavioral differences, it is highly relevant that the one observable difference of any significance arises not because of a difference in the version of Puppet, but because of a difference in the version of the Ruby underneath. John -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to puppet-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/puppet-users/ed271976-8776-4dc1-bb71-166fd5db8e82%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
