38 lines
648 B
Julia
38 lines
648 B
Julia
abstract type Hello end
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struct HelloWorld <: Hello
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name::String
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HelloWorld(s) = new(s)
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end
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struct HelloTime <: Hello
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name::String
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tnew::DateTime
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HelloTime(s) = new(s, now())
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end
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sayhello(hlo) = println("Hello to this world, $(hlo.name)!")
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sayhello(hlo::HelloTime) = println("It is now $(now()). Hello from back in $(hlo.tnew), $(hlo.name)!")
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h1 = HelloWorld("world")
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h2 = HelloTime("new world")
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sayhello(h1)
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sayhello(h2)
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fh = open("objects.dat", "w")
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serialize(fh, h1)
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serialize(fh,h2)
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close(fh)
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sleep(10)
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fh = open("objects.dat", "r")
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hh1 = deserialize(fh)
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hh2 = deserialize(fh)
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close(fh)
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sayhello(hh1)
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sayhello(hh2)
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