Feature #12240: circle number arguments

• Status: Rejected
• Assignee: -
• Target version: -

[nobu (Nobuyoshi Nakada)]

Often improvements about implicit block argument have been proposed, but in vain.

Such as:

[[1, 2], [3, 4]].map {|a1, a2| a1+a2} #=> [3, 7]

to

[[1, 2], [3, 4]].map {_1+_2}

Now, we (ko1 and nobu) found and propose the perfect solution.

[[1, 2], [3, 4]].map {①+②}

①..⑳ denote the arguments upto 20.

https://github.com/ruby/ruby/compare/trunk...nobu:feature/number-arg

[duerst (Martin Dürst)]

On 2016/04/01 15:10, [e-mail] wrote:

[[1, 2], [3, 4]].map {①+②}

①..⑳ denote the arguments upto 20.

I admire your modesty. Unicode's circled numbers go up to 50 (see
http://www.unicode.org/charts/PDF/U3200.pdf), which should take care of
even the most complicated blocks.

In addition, there are two series of circled black numbers with white
background (serif and sans-serif), although only up to 10. Then we have
also two series of circled white numbers with black backgrounds, one up
to 10 and the other up to 20. And then there are also double-circled
numbers (up to 10). I'm sure we can find some good uses for these series!

In addition, a proposal for adding black and white circled numbers
possibly up into the 200s was recently discussed on the
[e-mail] mailing list (see
http://www.unicode.org/mail-arch/unicode-ml/y2016-m03/0022.html and
followups), for use in Go (囲碁) diagrams. If such a proposal gets
accepted, there's even less chance of running out of numbers for
implicit arguments :-).

Regards, Martin.

[nobu (Nobuyoshi Nakada)]

Martin Dürst wrote:

In addition, a proposal for adding black and white circled numbers
possibly up into the 200s was recently discussed on the
[e-mail] mailing list (see
http://www.unicode.org/mail-arch/unicode-ml/y2016-m03/0022.html and
followups), for use in Go (囲碁) diagrams. If such a proposal gets
accepted, there's even less chance of running out of numbers for
implicit arguments :-).

HOLY UNICODE!!

[usa (Usaku NAKAMURA)]

• Assignee set to 10790

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Rejected

[nobu (Nobuyoshi Nakada)]

• Related to Feature #15741: Ordinal parameters added

[nobu (Nobuyoshi Nakada)]

As now we have @1 and so on, revised and refined this patch.
https://github.com/nobu/ruby/pull/new/feature/circled_numparams