# Removing mixin methods **URL:** \ **Category:** Ruby\ **Created:** [October 31, 2008, 8:55pm UTC](https://www.ruby-forum.com/t/removing-mixin-methods/152255 "2008-10-31T20:55:38Z")\ **Posts on this page:** 2\ **Page:** 1

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [October 31, 2008, 8:55pm UTC](https://www.ruby-forum.com/t/removing-mixin-methods/152255/1 "2008-10-31T20:55:38Z")

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 ---

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\ **Post date:** [October 31, 2008, 9:39pm UTC](https://www.ruby-forum.com/t/removing-mixin-methods/152255/2 "2008-10-31T21:39:44Z")

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”]}