js中splice的删除、截取、插入、替换

2021-05-31 17:00

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标签：rac lex title adr array flex racket data- wrapper

var arr =["George","John","Thomas","James","Adrew","Martin"]

let mm = arr.splice(2,3)

console.log(arr) // 结果 ["George","John","Martin"] 如果arr不赋给某个值，直接使用arr.splice(2,3) ，结果arr就是删除第三位后面的三个元素之后剩余元素组成的数组

console.log(mm) // 结果 ["Thomas","James","Adrew"] 如果arr赋给某个值，结果mm就是第三位元素后面的三个元素组成的数组。

var arr1 =["George","John","Thomas","James","Adrew","Martin"]

arr1.splice(2,0,"Jack") [ "George", "John", "Jack", "Thomas", "James", "Adrew", "Martin" ] // 插入将新元素插入第三个位置，后面的依次排后

arr1.splice(2,1,"Jack") [ "George", "John", "Jack", "James", "Adrew", "Martin" ] // 替换将新元素替换掉第三个元素

js中splice的删除、截取、插入、替换

标签：rac lex title adr array flex racket data- wrapper

原文地址：https://www.cnblogs.com/wwxdxgb/p/14636291.html

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文章标题：js中splice的删除、截取、插入、替换
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