Re: Vim9 dict key notation old fashion depreciated

Filipe Contreras wrote:

> On Thursday, December 3, 2020 at 5:34:04 AM UTC-6 Bram Moolenaar wrote:
>
> > Looks like your problem is with the "fg+" key, the plus character is not
> > allowed in a literal key. You can use the Javascript notation, using
> > square brackets:
>
> ['fg+']: ["fg", "CursorLine", "CursorColumn", "Normal"],
>
>
> What's wrong with 'fg+'? In JavaScript there's no need for brackets. It's
> there for want to you use a variable.

In the browser console:

var d = {key+: 'value'}
% Uncaught SyntaxError: Unexpected token '+'

We do allow for the underscore and minus sign. We could allow for a few
more, but it can get confusing. Javascript doesn't even allow for the
minus sign.

Oh, you mean using single quotes without the brackets works. Double
quotes too. That is simpler. Somehow I didn't find this in the
specification. I see questions on stack overflow from more people who
are confused about this. Only for JSON it's clear that double quotes
are always required.


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