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diff --git a/ruby_1_8_6/sample/list3.rb b/ruby_1_8_6/sample/list3.rb
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+# Linked list example -- short version
+# using inspect
+
+class Point
+ def initialize(x, y)
+ @x = x; @y = y
+ self
+ end
+
+ def to_s
+ sprintf("%d@%d", @x, @y)
+ end
+end
+
+list1 = [10, 20, Point.new(2, 3), Point.new(4, 5)]
+list2 = [20, Point.new(4, 5), list1]
+print("list1: ", list1.inspect, "\n")
+print("list2: ", list2.inspect, "\n")