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nusco/lazy_instance_variable.rb

Created August 18, 2010 15:21
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Spell: Lazy Instance Variable
Raw
lazy_instance_variable.rb
# =============================
# Spell: Lazy Instance Variable
# =============================
# Wait until the first access to initialize an instance variable.
class C
def attribute
@attribute = @attribute || "some value"
end
end
obj = C.new
obj.attribute # => "some value"
# For more information: http://www.pragprog.com/titles/ppmetr/metaprogramming-ruby
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