题解 | #添加元素#
添加元素
http://www.nowcoder.com/practice/941bcfa5b87940869fda681c1597fd3a
function insert(arr, item, index) {
let result = arr.slice(0)
result.splice(index, 0, item)
return result
}添加元素
http://www.nowcoder.com/practice/941bcfa5b87940869fda681c1597fd3a
function insert(arr, item, index) {
let result = arr.slice(0)
result.splice(index, 0, item)
return result
}相关推荐