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- //chapter 10 : Map & Set
- // set
- const roles = new Set();
- roles.add('User');
- roles.add('Admin');
- console.log(roles.size);
- roles.add('User');
- console.log(roles.size);
- console.log(roles.delete('Admin')); //true
- console.log(roles.size); //Set ["User"]
- console.log(roles.delete('Admin')); //false
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