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avit/string_pool.rb

Last active June 30, 2017 17:30
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string_pool.rb
strings = Hash.new { |h, k| h[k] = k.freeze }
#=> {}
a = strings["asdf"]
#=> "asdf"
a.object_id
#=> 70266940175600
b = strings["asdf"]
b.object_id
#=> 70266940175600
c = "asdf"
c.object_id
#=> 70266937176080
d = strings[c]
d.object_id
#=> 70266940175600
strings.keys.map(&:object_id)
#=> [70266940175600]
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