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js删除数组最后一个元素

作者：xlnxin发布时间：2023-10-06分类：其他教程浏览：479

导读：slice删除123456789vararr=[1,2,3,4,5]varnew_arr=arr.slice(0,-1)//arr=>[1,2,3,4,...

slice 删除

var arr = [1,2,3,4,5]

var new_arr = arr.slice(0, -1)

// arr => [1,2,3,4,5]

// new_arr => [1,2,3,4]

var arr = [1,2,3,4,5]

var new_arr = arr.slice(0, arr.length - 1)

// arr => [1,2,3,4,5]

// new_arr => [1,2,3,4]

splice 删除

var arr = [1,2,3,4,5]

var new_arr = arr.splice(-1)

// arr => [1,2,3,4]

// new_arr => [5]

var arr = [1,2,3,4,5]

var new_arr = arr.splice(-1, 1)

// arr => [1,2,3,4]

// new_arr => [5]

var arr = [1,2,3,4,5]

var new_arr = arr.splice(arr.length - 1)

// arr => [1,2,3,4]

// new_arr => [5]

var arr = [1,2,3,4,5]

var new_arr = arr.splice(arr.length - 1, 1)

// arr => [1,2,3,4]

// new_arr => [5]

pop 删除

var arr = [1,2,3,4,5]

arr.pop()

// arr => [1,2,3,4]

for 删除

var arr = [1,2,3,4,5]

var new_arr = []

for (let i = 0, len = arr.length; i < len; i++) {

if (i < len - 1) {

new_arr.push(arr[i])

}

// arr => [1,2,3,4,5]

// new_arr => [1,2,3,4]

length 删除

var arr = [1,2,3,4,5]

arr.length = arr.length - 1

// arr => [1,2,3,4]

标签：js

js删除数组最后一个元素

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