大致总结了五种方法,一起看看吧~~·
(一)slice方法
let arr = [1,2,3,4]let arr1= arr.slice() //或者是 let arr1= arr.slice(0)arr[0] = 6console.log(arr) // [6, 2, 3, 4]console.log(arr1) // [1, 2, 3, 4]
(二)自己封装一个myClone函数
Array.prototype.myClone = function(){ let newArr=[]; for(let i=0;i
(三)展开运算符 [...arr]
const arr1 = [1, 2];const arr2 = [...a1];arr1[0] = 6console.log(arr1) // [6, 2]console.log(arr2) // [1, 2]
(四)concat方法
var arr1 = [1,2,3]var arr2 = arr1.concat() //或者是 var arr2 = arr1.concat([])arr1[0] = 6console.log(arr1) //[6,1,2]console.log(arr2) //[1,2,3]
(五)Object.assign()
let arr = [1,2,3,4]let arr1 = []Object.assign(arr1,arr)arr[0] = 6console.log(arr) // [6, 2, 3, 4] console.log(arr1) // [1, 2, 3, 4]
嘻嘻嘻嘻嘻~~~