dc wrote:
> hi -
> 
> trying to debug some metaprogramming, i just want to find the methods
> of an object, and remove all methods created by mixins from other
> modules.
> 
> its easy enough to remove the superclass/inheritance chain,
> 
>     mm = @pet.methods - @pet.class.superclass.methods
> 
> but is there a way to remove any methods that come from other modules
> mixed in?
> 
> thanks!
> 
> /dc

Does this help?

class MyArray < Array
  def foo
  end
end

origins = MyArray.ancestors.inject(Hash.new) { |result, mod|
  result.update(mod => mod.instance_methods(false))
}

require 'pp'
pp origins

# =>
{Object=>[],
 Enumerable=>
  ["select",
   "each_with_index",
   "grep",
   "map",
   "find_all",
   "sort_by",
   "collect",
   "detect",
   "max",
   "to_a",
   "sort",
   "partition",
   "any?",
   "include?",
   "reject",
   "zip",
   "find",
   "min",
   "member?",
   "entries",
   "inject",
   "all?"],
 Array=>
  ["concat",
   "push",
   "include?",
   "rassoc",
   "&",
   "compact!",
   "delete_at",
   "size",
   "collect!",
   "collect",
   "reverse_each",
   "flatten",
   "uniq!",
   "reverse",
   "first",
   "fill",
   "*",
   "insert",
   "reject!",
   "unshift",
   "+",
   "compact",
   "replace",
   "pack",
   "select",
   "at",
   "zip",
   "transpose",
   "to_s",
   "-",
   "eql?",
   "index",
   "pop",
   "uniq",
   "hash",
   "[]",
   "delete_if",
   "map!",
   "[]=",
   "|",
   "map",
   "indexes",
   "assoc",
   "<<",
   "last",
   "values_at",
   "length",
   "slice!",
   "reject",
   "each_index",
   "delete",
   "sort!",
   "sort",
   "fetch",
   "each",
   "clear",
   "join",
   "empty?",
   "inspect",
   "rindex",
   "flatten!",
   "frozen?",
   "shift",
   "<=>",
   "to_ary",
   "==",
   "reverse!",
   "slice",
   "to_a",
   "indices",
   "nitems"],
 Kernel=>
  ["clone",
   "protected_methods",
   "freeze",
   "instance_variable_set",
   "is_a?",
   "type",
   "methods",
   "=~",
   "send",
   "instance_of?",
   "__id__",
   "instance_variables",
   "to_s",
   "eql?",
   "dup",
   "hash",
   "private_methods",
   "nil?",
   "class",
   "tainted?",
   "singleton_methods",
   "extend",
   "instance_eval",
   "untaint",
   "__send__",
   "display",
   "method",
   "instance_variable_get",
   "object_id",
   "kind_of?",
   "inspect",
   "taint",
   "frozen?",
   "==",
   "public_methods",
   "id",
   "respond_to?",
   "===",
   "equal?",
   "to_a"],
 MyArray=>["foo"]}

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