On Nov 11, 2010, at 4:22 PM, David Kahn wrote:
A little confused: My aim is to get an array of *only* the methods I
create in my class. For example, in the class below if I am
successful I should see a list of three methods:
[:subject, :affiliate, :address].
Well, I think you mean six methods as you'll have the setters also.
I know I can ask for class#methods, but that gives me a lot of
inherited methods (see below). I see online that if I call
class#methods(false) then I should get my desired response, however
when I try this on this class, I get [], empty array. Is there a way
to do this? Reason why I want this is so I can iterate my methods on
initialize and set default values, to avoid @subect=""
@affiliate="".... etc. Of course my real class is much bigger than
three methods otherwise would not worry about it.
ruby-1.9.2-p0 > class Entry
ruby-1.9.2-p0 ?> attr_accessor :subject,
ruby-1.9.2-p0 > :affiliate,
ruby-1.9.2-p0 > :address
ruby-1.9.2-p0 ?> end
=> nil
ruby-1.9.2-p0 > e = Entry.new
=> #<Entry:0x2778ec0>
ruby-1.9.2-p0 > e.methods(false)
=> []
ruby-1.9.2-p0 > e.methods
=>
[:subject
, :subject
=
, :affiliate
, :affiliate
=
, :address
, :address
=
, :taguri
=
, :taguri
, :to_yaml_style
, :to_yaml_properties
, :syck_to_yaml
, :to_yaml
, :blank
?, :present
?, :presence
, :duplicable
?, :acts_like
?, :try
, :html_safe
?, :`
, :returning
, :to_param
, :to_query
, :instance_values
, :instance_variable_names
, :copy_instance_variables_from
, :to_json
, :with_options
, :as_json
, :require_or_load
, :require_dependency
, :require_association
, :load_dependency
, :load
, :require
, :unloadable
, :pretty_print
, :pretty_print_cycle
, :pretty_print_instance_variables
, :pretty_print_inspect
, :to_sql
, :equality_predicate_sql
, :inequality_predicate_sql
, :bind, :find_correlate_in, :nil?, :===, :=~, :!
~
, :eql
?, :hash
, :<
=
>
, :class
, :singleton_class
, :clone
, :dup
, :initialize_dup
, :initialize_clone
, :taint
, :tainted
?, :untaint
, :untrust
, :untrusted
?, :trust
, :freeze
, :frozen
?, :to_s
, :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
, :gem
, :silence_warnings
, :enable_warnings
, :with_warnings
, :silence_stderr
, :silence_stream
, :suppress
, :class_eval
, :pretty_inspect
, :require_library_or_gem
, :debugger, :breakpoint, :==, :equal?, :!, :!
=, :instance_eval, :instance_exec, :__send__]
ruby-1.9.2-p0 >
In your subject line, you almost had it right, try:
Entry.instance_methods(false)
Here's a quick implementation of something like you described.
class Entry
attr_accessor :subject, :affiliate, :address
def initialize(options={})
self.class.instance_methods(false).grep(/\=/).each do |name|
var = name.to_s.sub(/=$/,'').to_sym
if options.has_key?(var)
puts "#{name} #{options[var]}"
self.send(name, options[var])
else
puts "no value given for #{var}"
end
end
end
end
irb> Entry.instance_methods(false)
=> [:subject, :subject=, :affiliate, :affiliate=, :address, :address=]
irb> e = Entry.new(:address => '123 Main St.')
no value given for subject
no value given for affiliate
address= 123 Main St.
=> #<Entry:0x1e73f0 @address="123 Main St.">
-Rob
Rob Biedenharn http://agileconsultingllc.com
[email protected]
+1 513-295-4739
Skype: rob.biedenharn
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