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Validating Object Initialization Using Metaprogramming
Source: <a href="http://stackoverflow.com/questions/613985/common-ruby-idioms">Common Ruby Idioms</a> [stackoverflow.com]
<snip>
class Ticket
@remaining = 3
def self.new
if @remaining > 0
@remaining -= 1
super
else
"IOU"
end
end
end
Ticket.new #=> Ticket
Ticket.new #=> Ticket
Ticket.new #=> Ticket
Ticket.new #=> "IOU"
</snip>
