Object Destructuring

    //Why Destructuring (and ES6) is Awesome
    
    let person = {
      id: 123,
      name: "Leslie",
      dob: new Date("1985-01-01").valueOf(),
      age: 44,
      salary: 55000,
      department: "Parks and Recreation",
      hometown: "Pawnee"
    };
    
    savePersonES5(person);
    savePersonES6(person);
    
    // old way of doing this
    function savePersonES5(someObj) {
      let id = Date.now();
      if (someObj.id) {
        id = someObj.id;
      }
      let name = someObj.name;
      if (!name) {
        name = "Blank";
      }
      let dob = someObj.dob ? someObj.dob : new Date("2000-01-01").valueOf();

      //save it in localStorage for later use
      const KEY = "someRandomUniqueString";
      let jsonStr = JSON.stringify({ id: id, name: name, dob: dob });
      localStorage.setItem(KEY, jsonStr);
    }
    
    // new way of doing this
    function savePersonES6({
      id = Date.now(),                        //default value if it doesn't exist
      name = "Blank",                         //default value if it doesn't exist
      dob = new Date("2001-01-01").valueOf()  //default value if it doesn't exist
    }) {
      const KEY = "someRandomUniqueString";
      let jsonStr = JSON.stringify({ id, name, dob });    //allowed in ES6, if variable and property have the same name
      localStorage.setItem(KEY, jsonStr);
    }