Object serialization: Difference between revisions

=={{header|Julia}}==

<lang julia>

abstract type Hello end

struct HelloWorld <: Hello

name::String

Hello(s) = new(s)

end

struct HelloTime <: Hello

name::String

tnew::DateTime

HelloTime(s) = new(s, now())

end

sayhello(hlo) = println("Hello to this world, $(hlo.name)!")

sayhello(hlo::HelloTime) = println("It is now $(now()). Hello from back in $(hlo.tnew), $(hlo.name)!")

h1 = Hello("world")

h2 = HelloTime("new world")

sayhello(h1)

sayhello(h2)

fh = open("objects.dat", "w")

serialize(fh, h1)

serialize(fh,h2)

close(fh)

sleep(10)

fh = open("objects.dat", "r")

hh1 = deserialize(fh)

hh2 = deserialize(fh)

close(fh)

sayhello(hh1)

sayhello(hh2)

</lang>