ES6数组的解构

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 //数组解构
    const namess = ['Henry','Bucky','Emily'];
    // 解构
    const [name1,name2,name3] = namess ;
    console.log(name1,name2,name3)//Henry Bucky Emily


//返回数组个数

  const {length} = namess;//如果接收的方式是数组方式,写多少个返回多少个,如果是对象的方式,会把数组里的个数返回来
    console.log(length)//3




    // 结合展开运算符
    const [name4,...set] = namess;
    console.log(name4)//Henry
    console.log(set)//[ 'Bucky', 'Emily' ]
    console.log(name,set)//henry [ 'Bucky', 'Emily' ]