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Task/Object-serialization/EchoLisp/object-serialization-2.echolisp

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+;; reboot (close the browser window)
+; inspect objects.dat :
+(local-keys 'objects.dat) → ("elvis" "papa" "simon")
+
+(define simon (local-get-value 'simon "objects.dat"))
+(define elvis (local-get-value 'elvis "objects.dat"))
+(define papa (local-get-value 'papa "objects.dat"))
+
+; data are restored
+simon → Simon: writer of (my-life my-wife my-bike).
+papa → papa: father of (Simon Elvis).
+
+;; check if references (pointers) are restored
+(set-writer-name! simon "Antoinette") → "Antoinette"
+simon→ Antoinette: writer of (my-life my-wife my-bike).
+
+;; inspect
+papa → papa: father of (Antoinette Elvis). ; YES 😳 !
+
+;; - Self-referencing  (EchoLisp version 2.11)
+;; add 'papa' to the chidren of 'papa' - whatever this means - and print it :
+(set-father-children! papa (list simon papa elvis))
+papa → papa: father of (Antoinette papa Elvis).
+
+; save/restore
+(local-put-value 'papa papa "objects.dat")
+(define papa (local-get-value 'papa "objects.dat"))
+papa → papa: father of (Antoinette papa Elvis).