Created
November 10, 2010 23:49
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Less hacky options hash
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module Optionize | |
class AlreadyDefinedError < StandardError; end | |
def self.included( base ) | |
base.extend ClassMethods | |
end | |
module ClassMethods | |
def optionize( key, opts={} ) | |
getter = key | |
setter = "#{key}=" | |
if method_defined?( getter ) || method_defined?( setter ) | |
raise AlreadyDefinedError | |
end | |
# Getter | |
define_method getter do | |
result = self.options[ key ] | |
result ||= opts[ :default ] | |
result = result.send( opts[:get] ) if opts[:get] | |
result | |
end | |
# Setter | |
define_method setter do |value| | |
value = value.send( opts[:set] ) if opts[:set] | |
self.options = self.options.merge key => value | |
end | |
end | |
end | |
end | |
class Job | |
attr_accessor :options | |
include Optionize | |
optionize :tyson_is_rad, :default => 10, :get => :to_i, :set => :to_s | |
def options | |
@options ||= {} | |
end | |
end | |
j = Job.new | |
p "default = #{j.tyson_is_rad}" | |
j.tyson_is_rad = "123" | |
p "after set = #{j.tyson_is_rad}" |
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