On Thu, Nov 11, 2010 at 4:12 PM, Rob Biedenharn
<[email protected]>wrote:
>
> 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.">
>
Ah - right, six methods. This is great, just tried, thanks!
>
> -Rob
>
> Rob Biedenharn http://agileconsultingllc.com
> [email protected]
> +1 513-295-4739
> Skype: rob.biedenharn
>
>
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