<HTML> <body> </body> <script> let messages = [ {text: "Hello", from: "John"}, {text: "How goes?", from: "John"}, {text: "See you soon", from: "Alice"} ]; let readMap = new WeakMap(); alert(readMap.size); readMap.set(messages[0], new Date(2019, 3, 5)); </script> </HTML> <!-- task4 needed weakSet to save simply readmessage, this task needs to save THE TIME IT WAS READ along with the message itself the message out of the set or map means it hasn't been read I kinda feel good and bad at the same time to happen to read the solution but I do get to think more about the difference with tasks and be more available to understand the main contents so I think, its good? -->
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