From: "jeremyevans0 (Jeremy Evans)" <noreply@ruby-lang.org>
To: ruby-core@ruby-lang.org
Subject: [ruby-core:105579] [Ruby master Feature#7793] New methods on Hash
Date: Wed, 06 Oct 2021 20:20:30 +0000 (UTC) [thread overview]
Message-ID: <redmine.journal-94039.20211006202029.124@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-7793.20130207015307.124@ruby-lang.org
Issue #7793 has been updated by jeremyevans0 (Jeremy Evans).
Status changed from Assigned to Closed
This feature was implemented as `transform_keys`, `transform_values`, and `to_h`.
----------------------------------------
Feature #7793: New methods on Hash
https://bugs.ruby-lang.org/issues/7793#change-94039
* Author: dsisnero (Dominic Sisneros)
* Status: Closed
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
----------------------------------------
It would be nice to have the following methods added to hash
~~~ruby
h = { name: 'dominic', request: 'add the following methods', :why => 'convenience'}
h.map_v{|v| v.upcase}
#=> {:name=>"DOMINIC", :request=>"ADD THE FOLLOWING METHODS", :why=>"CONVENIENCE"}
h.map_k{|k| k.to_s}
#=> { "name"=> 'dominic', "request"=>"add the following methods', "why" => "convenience"}
h.map_kv{|k,v| [k.to_s, v.upcase]}
#=> { "name"=>"DOMINIC", "request"=>"ADD THE FOLLOWING METHODS", "why"=>"CONVENIENCE"}
class Hash
def map_v
reduce({}) do |result, array|
k,v = array
new_val = yield v
result.merge( k => new_val)
end
end
def map_k
reduce({}) do |result, array|
k,v = array
new_k = yield k
result.merge(new_k => v)
end
end
def map_kv
reduce({}) do |result, array|
new_k,new_v = yield array
result.merge(new_k => new_v)
end
end
end
--
https://bugs.ruby-lang.org/
parent reply other threads:[~2021-10-06 20:20 UTC|newest]
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