Javascript数组splice函数 - js根据key删除数组某个值 - js在数组指定位置插入值

Posted 2022-03-31 Rudon滨海渔村

完整代码-删除

数组.splice( 下标key， 删除个数 )
数组直接被修改

<script>

    let arr = [
        'Peter',
        'Kim',
        'Lucy',
        'Alina',
        'John'
    ];

    console.log(JSON.stringify(arr));
    // ["Peter","Kim","Lucy","Alina","John"]

    arr.splice(2, 1);

    console.log(JSON.stringify(arr));
    // ["Peter","Kim","Alina","John"]


</script>

更多函数说明：

JavaScript Array splice() 方法

完整代码-插入数组

<script>

    let arr = [
        'Peter',
        'Kim',
        'Lucy',
        'Alina',
        'John'
    ];

    console.log(JSON.stringify(arr));
    // ["Peter","Kim","Lucy","Alina","John"]

    arr.splice(3, 0, 'KKK', 'OOO');

    console.log(JSON.stringify(arr));
    // ["Peter","Kim","Lucy","KKK","OOO","Alina","John"]


</script>

封面