require "./model.cr"
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require "lua"
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class Business
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include LuaCallable
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def fetch_add(v = 1)
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if v.is_a?(Float64)
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v += Model.get;
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Model.set v.to_i!;
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return v.to_i!;
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else
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raise "Danger: wrong return value"
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end
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end
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end
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