undef singleton method from ruby object -


i able undef singleton method on given object.

class end  = a.new def a.foo   puts "bar" end  # undef a.foo here a.foo # should crash 

class end  = a.new def a.foo   puts "bar" end  a.instance_eval { undef :foo }  a.foo # =>  undefined method `foo' #<a:0x8469c60> (nomethoderror)

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