[ruby-core:57266] Re: [ruby-trunk - Feature #8921][Open] Allow select, reject, etc to accept a regex

I mean, couldn't select, reject and friends take one parameter in case no
block is passed and compare elements using the threequals operator. This
would enable one to do things like:

[1, 56, 12, 7, 39].select 0..20 #=> [1, 12]
%w( foo bar baz ).reject /^ba/ #=> [foo]


On Wednesday, September 18, 2013, Fuad Saud wrote:

> Shouldn't select/reject use threequals?
> On Sep 18, 2013 12:25 PM, "kyledecot (Kyle Decot)" <[e-mail]<javascript:_e({}, 'cvml', '[e-mail]');>>
> wrote:
>
>>
>> Issue #8921 has been updated by kyledecot (Kyle Decot).
>>
>>
>> =begin
>> Yes, grep would be a suitable alternative for `select` w/ a regex in this
>> instance. What about for `reject` though? I feel that
>>
>>     %w[foo bar baz].reject /^ba/ # ["foo"]
>>
>> Is more readable than
>>
>>     %w[foo bar baz].grep /^[^ba]/ # ["foo"]
>>
>>
>> Using `reject` also makes it so that I don't have to rewrite my regular
>> expression to negate what I'm looking for. My example is pretty trivial but
>> I think that it would quickly get out of hand if trying to grep things
>> "out" instead of "in".
>> =end
>> ----------------------------------------
>> Feature #8921: Allow select, reject, etc to accept a regex
>> https://bugs.ruby-lang.org/issues/8921#change-41882
>>
>> Author: kyledecot (Kyle Decot)
>> Status: Open
>> Priority: Normal
>> Assignee:
>> Category:
>> Target version:
>>
>>
>> It would be really handy if for instance `select` could accept a regex.
>> For example
>>
>> ```
>> %w[foo bar baz].select /^ba/ # ["bar", "baz"]
>> ```
>>
>> I know that this is currently possible via the slightly longer syntax
>>
>> ```
>> %w[foo bar baz].select{|i| i[/^ba/] } # ["bar", "baz"]
>> ```
>>
>>
>>
>> --
>> http://bugs.ruby-lang.org/
>>
>

-- 
Fuad Saud

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