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Re: The ,= operator

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Ralph Mellor
November 30, 2020 02:41
Re: The ,= operator
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>  Ralph Mellor <> wrote:
> >> > @r = @r , 'd';
> >>
> >> There isn't anything very useful in this behavior though, is there?
> Just to be clear, I wasn't saying I didn't think circular references
> should be forbidden, I just specifically meant that you weren't likely
> to want the ",=" operator to create them.

Ah. OK.

My guess is that when they *are* constructed, they're almost always
constructed using `=` and `,`. And that would lead to the same result
and display that use of `,=` does. After all, the latter is just shorthand
for the former.

> But then really, I'm not too likely  ",=" for appending additional array
> elements, I'm more likely to reach for .push.

Indeed. (Or .append.)

My tentative strawman proposal based on discussion thus far is:

* The doc page showing use of `,=` with a hash might benefit from
a parenthetical remark that push/append is the right tool to use with
positionals rather than `,=` because, unlike associatives, for which
flattening is the only sensible semantics, positionals instead default
to *not* flattening (so they more easily retain structure, which is what
most folk want most of the time).

* Liz's "thoughts welcome" is applicable to all things, and in particular
to the gist of self-referential data.

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