From: "Martin J. Dürst" <duerst@...>
Date: 2020-09-27T16:56:39+09:00
Subject: [ruby-core:100185] Re: [Ruby master Feature#16994] Sets: shorthand for frozen sets of symbols / strings

Hello Eric, others,

On 26/09/2020 05:04, Eric Wong wrote:
> matz@ruby.or.jp wrote:
>> Remaining issues:
>>
>> * Name? `%ws` would be the first two character specifier after `%`. Is it reasonable? Or should we seek another name?
>> * Frozen? `%w` returns non frozen array of non frozen strings. How should `%ws` behave?
> 
> How about suffix notation similar to Regexp modifiers?
> 
> 	[ 'foo', 'bar' ]s

Whatever the actual syntax, it would be better to have such specifiers 
up front. Array/Hash/Set literals can be quite long.

(Regexps can also be quite long, but in that case, they usually use
whitespace/linebreaks (and a /x at the end), and are therefore easy
to spot from the first line.)

Regards,   Martin.


> Or with ability to specify ordering:
> 
> 	[ 'foo', 'bar' ]os  # ordered set
> 	[ 'foo', 'bar' ]us  # unordered set
> 
> Fwiw, I sometimes wish I could use unordered hash to save space:
> 
> 	{ 'foo' => 'bar' }u
> 
> And maybe 'f' modifier for frozen strings of values
> 
>> https://bugs.ruby-lang.org/issues/16994#change-87685


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