I think JavaScript has reached "peak token"... I also wanted to use the #
for generic map/list literal syntax: https://esdiscuss.org/topic/map-literal
On 15 July 2017 at 04:24, Isiah Meadows <isiahmead...@gmail.com> wrote:
> Few nits inline:
>
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>
> Isiah Meadows
> m...@isiahmeadows.com
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> On Fri, Jul 14, 2017 at 11:11 PM, Bob Myers <r...@gol.com> wrote:
> > The proposal to write `arr.reduce((+))`, with `(+)` as an alternative to
> > `(a, b) => a + b` is admirably concise, but syntactically challenging.
>
> Actually, it's not as *syntactically* challenging as you might think;
> it can be discerned just by recognizing the token sequence `(` @ `)`,
> where @ is the operator's token in question.
>
> >
> > The idea is a new form of function we'll call a "pound function",
> written as
> > `#{ }`, Within the body, parameters are available as `#0`, `#1`, etc.
>
> Potential complication: the parameter names visually conflict with the
> private member proposal.
>
> https://github.com/tc39/proposal-class-fields
>
> >
> > ```js
> > arr.reduce(#{# + #})
> > arr.sort(#{#.order - #.order})
> > ```
>
> This quite honestly looks like line noise. Also, it doesn't look clear
> at a glance whether it should be equivalent to `(a, b) => a + b` or `a
> => a + a` (using the first example).
>
> >
> > If need be, we can define `...##` inside pound functions as referring to
> the
> > argument list, so
> >
> > ```js
> > const sumParams = #{##.reduce(#{# + #})};
> > ```
>
> That does not look very elegant nor readable.
>
> >
> > Ugh. Anyway, I will leave it others to opine on whether this cryptic
> syntax
> > is worth the trouble, issues related to nested pound functions, etc. etc.
> >
>
> You might want to investigate Clojure's [1] and Swift's [2] similar
> existing syntaxes for this.
>
> [1]: https://coderwall.com/p/panlza/function-syntax-in-clojure
> [2]: https://developer.apple.com/library/content/documentation/
> Swift/Conceptual/Swift_Programming_Language/Functions.html
>
> >
> > Bob
> >
> >
> >
> > _______________________________________________
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> > https://mail.mozilla.org/listinfo/es-discuss
> >
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