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andyjeffries/gist:113477

Created May 18, 2009 13:57
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gistfile1.rb
class IO
def encrypted_read(filename)
puts filename
end
alias_method :non_encrypted_read, :read
alias_method :read, :encrypted_read
end
#>> IO.read('a')
#Errno::ENOENT: No such file or directory - a
# from (irb):35:in `read'
# from (irb):35
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