On Fri, Nov 11, 2011 at 2:50 AM, Fily Salas <fs_tigre / hotmail.com> wrote: > The problem I see with this (if you want to call it a problem) is that > for novice like me, there is no way to know what methods have been > inherited from the module or other classes since they are not listed > here, I could open the module or the class itself, but how do you know > what methods have been inherited to other classes. irb(main):040:0> system "ri Array | head" = Array < Object ------------------------------------------------------------------------------ = Includes: Enumerable (from ruby core) (from ruby core) ------------------------------------------------------------------------------ Arrays are ordered, integer-indexed collections of any object. Array indexing starts at 0, as in C or Java. A negative index is assumed to be relative to => true irb(main):041:0> Array.methods.grep /methods/ => [:instance_methods, :public_instance_methods, :protected_instance_methods, :private_instance_methods, :methods, :singleton_methods, :protected_methods, :private_methods, :public_methods] irb(main):052:0> system "ri instance_methods | head" = .instance_methods (from ruby core) === Implementation from Module ------------------------------------------------------------------------------ mod.instance_methods(include_super=true) -> array ------------------------------------------------------------------------------ => true irb(main):054:0> Array.instance_methods => [:inspect, :to_s, :to_a, :to_ary, :frozen?, :==, :eql?, :hash, :[], :[]=, :at, :fetch, :first, :last, :concat, :<<, :push, :pop, :shift, :unshift, :insert, :each, :each_index, :reverse_each, :length, :size, :empty?, :find_index, :index, :rindex, :join, :reverse, :reverse!, :rotate, :rotate!, :sort, :sort!, :sort_by........ <snipped> irb(main):061:0> (Array.instance_methods - Array.instance_methods(false) ).sort => [:!, :!=, :!~, :===, :=~, :__id__, :__send__, :all?, :any?, :chunk, :class, :clone, :collect_concat, :define_singleton_method, :detect, :display, :dup, :each_cons, :each_entry, :each_slice, :each_with_index, :each_with_object, :entries, :enum_for, :equal?, :extend, :find, :find_all, :flat_map, :freeze, :grep, :group_by, :initialize_clone, :initialize_dup, :inject, :instance_eval, :instance_exec, :instance_of?, :instance_variable_defined?, :instance_variable_get, :instance_variable_set, :instance_variables, :is_a?, :kind_of?, :max, :max_by, :member?, .......<snipped>