[#106355] [Ruby master Bug#18373] RBS build failure: '/include/x86_64-linux/ruby/config.h', needed by 'constants.o'. — "vo.x (Vit Ondruch)" <noreply@...>
Issue #18373 has been reported by vo.x (Vit Ondruch).
28 messages
2021/12/01
[ruby-core:106422] Re: [Ruby master Feature#18369] users.detect(:name, "Dorian") as shorthand for users.detect { |user| user.name == "Dorian" }
From:
Brandon Weaver <keystonelemur@...>
Date:
2021-12-02 22:29:21 UTC
List:
ruby-core #106422
You know, it would be lovely to have a method like that that takes a pattern matching stanza and produces something which responds to ===. That would be a fairly elegant solution to the above question with more flexibility in other parts of applications. On Thu, Dec 2, 2021, 11:41 AM zverok (Victor Shepelev) < [email protected]> wrote: > Issue #18369 has been updated by zverok (Victor Shepelev). > > > > it would be nice to have syntax that allows to shorten one-line matchers > for predicates where they would be commonly used > > TBH, since pattern matching inception I hope for some way of putting > patterns into values窶杯o store them in constants, and, in that case, simple > `grep` will do (if that value would respond to `#===` which it should!): > ```ruby > MY_PATTERN = _pm_(first_name: /^J/, age: 18..) > > # ...and then > if value in MY_PATTERN ... > > # ...and, consequently, > people.grep(_pm_(first_name: /^J/, age: 18..)) > ``` > (I am marking the dreamed-of PM constructor as ugly `_pm_` here to > underline it is not a ready proposal, but "something should be here") > > ---------------------------------------- > Feature #18369: users.detect(:name, "Dorian") as shorthand for > users.detect { |user| user.name == "Dorian" } > https://bugs.ruby-lang.org/issues/18369#change-95052 > > * Author: dorianmariefr (Dorian Mariテゥ) > * Status: Open > * Priority: Normal > ---------------------------------------- > Hi, > > I was thinking I often do things like `collection.detect { |item| > item.attribute == value }` and a shorthand like > `collection.detect(:attribute, value)` would be quite useful > > What do you think? > > And I know there is `collection.detect { _1.attribute == value }` but I > try not to use `_1` and this syntax would be shorter and simpler > > Could also apply to other methods like `all?` > (`collection.all?(:attribute, value)`), and basically any Enumerable method > https://rubydoc.info/stdlib/core/Enumerable > > > > -- > https://bugs.ruby-lang.org/ > > Unsubscribe: <mailto:[email protected]?subject=unsubscribe> > <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core> > Unsubscribe: <mailto:[email protected]?subject=unsubscribe> <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>