def elements_with singular, plural = "#{singular}s"
class_eval <<-CODE
def #{plural}_with criteria = {}
criteria = if String === criteria then
{:name => criteria}
else
criteria.map do |k, v|
k = :dom_id if k.to_sym == :id
k = :dom_class if k.to_sym == :class
[k, v]
end
end
f = #{plural}.find_all do |thing|
criteria.all? do |k,v|
v === thing.send(k)
end
end
yield f if block_given?
f
end
def #{singular}_with criteria = {}
f = #{plural}_with(criteria).first
yield f if block_given?
f
end
alias :#{singular} :#{singular}_with
CODE
end