js中splice的删除、截取、插入、替换
2021-05-31 17:00
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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