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ftiasch/test.rb

Created October 14, 2020 06:36
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demonstrate the danger extending Ruby code objects with custom data members
Raw
test.rb
class MyString < String
attr_reader :flag
def initialize(s, f)
super s
@flag = f
end
end
s1 = MyString.new ' misa', :misa
s2 = s1.lstrip
p [s1.flag, s2.flag]
s1.lstrip!
p s1.flag
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