Sha256: 77cbfd9151f7a3cc4ee8f8659f7b1acb3a932d8113cf1e544d194380d60dd627
Contents?: true
Size: 987 Bytes
Versions: 9
Compression:
Stored size: 987 Bytes
Contents
# Adds Redcar::Observable to Struct. e.g:
#
# irb> Customer = ObservableStruct.new(:name, :address)
# => Customer
# irb> customer = Customer.new("Dave", "123 Main")
# => #<Customer name="Dave", address="123 Main">
# irb> customer.add_listener(:changed_name) { |new_name| puts "the new name is: #{new_name}" }
# => #<Proc:0x65f4cdd2@(irb):203>
# irb> customer.name = "Dan"
# the new name is Dan
# => #<Customer name="Dan", address="123 Main">
class ObservableStruct
def self.new(*args)
klass = Struct.new(*args)
klass.send(:include, Redcar::Observable)
if args.first.is_a?(String)
accessors = args[1..-1]
else
accessors = args
end
accessors.each do |accessor|
klass.class_eval %Q{
alias_method :real_#{accessor}=, :#{accessor}=
def #{accessor}=(val)
notify_listeners(:changed_#{accessor}, val) do
self.real_#{accessor} = val
end
end
}
end
klass
end
end
Version data entries
9 entries across 9 versions & 1 rubygems