编辑代码

//JSRUN引擎2.0，支持多达30种语言在线运行，全仿真在线交互输入输出。 
console.log("Hello JSRUN!   \n\n         - from NodeJS .");

let arr = [1, 3, {
    username: 'kobe'
    }];
let arr2 = arr.slice();    
arr2[0] = 'wade'; 
arr2[2].username = 'wade';
console.log(arr); //[ 1, 3, { username: 'wade' } ]
console.log(arr2); //[ 'wade', 3, { username: 'wade' } ] 

let a = [8, 9, 0, { name: 'bbb' }]
let b = [...a]
b[0] = 10
b[3].name = 'aaa'
console.log(a)