From: Yukihiro Matsumoto <matz@...>
Date: 2011-05-25T01:30:18+09:00
Subject: [ruby-core:36432] [Ruby 1.9 - Feature #4772] Hash#add_keys


Issue #4772 has been updated by Yukihiro Matsumoto.


I see no reason to add a method to generate keys only.  Hash is a set of key-value pairs, right?  Can you elaborate why you want this method?

matz.
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Feature #4772: Hash#add_keys
http://redmine.ruby-lang.org/issues/4772

Author: Joey Zhou
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 


Hi, do you want to add a new method Hash#add_keys in a new version?

hash = Hash.new {|h,k| k.to_s + "foo" }
hash.add_keys("a","b","c") # the value is hash's default obj or proc value

If there's a word list file, I want to make the words keys of a hash, maybe I can write:

hash = {}
hash.add_keys(*open("file").readlines.map(&:chomp))




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