将数组转换为对象

有时候，出于某种目的，需要将数组转化成对象，一个简单快速的方法是就使用展开运算符号(...):

var fruits = [“banana”, “apple”, “orange”, “watermelon”];
var fruitsObj = { …fruits };
console.log(fruitsObj); // returns {0: “banana”, 1: “apple”, 2: “orange”, 3: “watermelon”, 4: “apple”, 5: “orange”, 6: “grape”, 7: “apple”}

　合并数组

var fruits = [“banana”, “apple”, “orange”, “watermelon”];

let sddname = [...fruits, 'wewe']    
// [

“banana”, “apple”, “orange”, “watermelon”,

'wewe'

]