console.log( delete x ); // false
// function via declararion (沒有作用)
function f1(){ console.log('Hi 1'); }
console.log( delete f1 ); // false
console.log(f1); // ƒ f1(){ console.log('Hi 1'); }
// function via expression (沒有作用)
var f2 = function() { console.log('Hi 2'); }
console.log( delete f2 ); // false
console.log(f2); // ƒ () { console.log('Hi 2'); }
var fruits = ["Banana", "Orange", "Apple", "Mango"];
console.log( delete fruits[2] ); // true
console.log(fruits); // ["Banana", "Orange", empty, "Mango"]
var person = {name: 'John', age:18};
console.log( delete person.name ); // true
console.log(person); // {age: 18}