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View method_logging.rb
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# Totally untested.
 
module MethodLogging
def self.included(base)
base.methods.each do |m|
alias_method :"old_#{m}", m
define_method(m) do |args|
puts "Called #{m}(#{args.map{|a|a.inspect}.join(', ')})"
return_value = send("old_#{m}", *args)
puts "# => #{return_value.inspect}"
return_value
end
end
end
end
 
class Foo
def bar
# ...
end
 
include MethodLogging
end
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