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Editorial Team
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Asked: 2026-05-30T23:24:45+00:00

Just started learning Ruby metaprogramming. Looking at Object.methods I get: Object.methods => [ :allocate,

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Just started learning Ruby metaprogramming. Looking at Object.methods I get:

Object.methods => [
:allocate, 
:new, 
:superclass, 
:freeze, 
:===, 
:==, 
:<=>, 
:<, 
:<=, 
:>, 
:>=, 
:to_s, 
:included_modules, 
:include?, 
:name, 
:ancestors, 
:instance_methods, 
:public_instance_methods, 
:protected_instance_methods, 
:private_instance_methods, 
:constants, 
:const_get, 
:const_set, 
:const_defined?, 
:const_missing, 
:class_variables, 
:remove_class_variable, 
:class_variable_get, 
:class_variable_set, 
:class_variable_defined?, 
:module_exec, 
:class_exec, 
:module_eval, 
:class_eval, 
:method_defined?, 
:public_method_defined?, 
:private_method_defined?, 
:protected_method_defined?, 
:public_class_method, 
:private_class_method, 
:autoload, 
:autoload?, 
:instance_method, 
:public_instance_method, 
:nil?, 
:=~, 
:!~, 
:eql?, 
:hash, 
:class, 
:singleton_class, 
:clone, 
:dup, 
:initialize_dup, 
:initialize_clone, 
:taint, 
:tainted?, 
:untaint, 
:untrust, 
:untrusted?, 
:trust, 
:frozen?, 
:inspect, 
:methods, 
:singleton_methods, 
:protected_methods, 
:private_methods, 
:public_methods, 
:instance_variables, 
:instance_variable_get, 
:instance_variable_set, 
:instance_variable_defined?, 
:instance_of?, 
:kind_of?, 
:is_a?, 
:tap, 
:send, 
:public_send, 
:respond_to?, 
:respond_to_missing?, 
:extend, 
:display, 
:method, 
:public_method, 
:define_singleton_method, 
:__id__, 
:object_id, 
:to_enum, 
:enum_for, 
:equal?, 
:!, 
:!=, 
:instance_eval, 
:instance_exec, 
:__send__]

Is there a list of methods that are useful for metaprogramming? Such as instance_eval, initialize and method_missing?

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1 Answer

  1. Editorial Team

    Here is the top answer from this page :

    Method-related hooks

    method_missing
method_added
singleton_method_added
method_removed
singleton_method_removed
method_undefined
singleton_method_undefined

    Class & Module Hooks

    inherited
append_features
included
extend_object
extended
initialize_copy
const_missing

    Marshalling Hooks

    marshal_dump
marshal_load

    Coercion Hooks

    coerce
induced_from
to_xxx

    Also, check this blog post for explanations and sample code for many of these methods.

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