JS TS Splice用法

Posted 2021-08-31 LANGZI7758521

const { ccclass, property } = cc._decorator;

@ccclass
export default class NewClass extends cc.Component {


    onLoad() {
        // 删除从索引3开始的所有元素
        let arr1 = [0,1,2,3,4,5,6];
        let result1 = arr1.splice(3);
        console.log(arr1);   // 删除的结果
        console.log(result1);// 被删除的元素

        let arr2 = [0,1,2,3,4,5,6];
        let result2 = arr2.splice(2, 2);
        console.log(arr2);   // 删除的结果
        console.log(result2);// 被删除的元素

        let arr3 = [0,1,2,3,4,5,6];
        let result3 = arr3.splice(-2, 3);
        console.log(arr3);   // 删除的结果
        console.log(result3);// 被删除的元素

        // 在索引2前面插入元素100
        let arr4 = [0,1,2,3,4,5,6];
        let result4 = arr4.splice(2, 0, 100);
        console.log(arr4);   // 删除的结果
        console.log(result4);// 被删除的元素

        // 在索引2的元素替换为100(指定元素更新)
        let arr5 = [0,1,2,3,4,5,6];
        let result5 = arr5.splice(2, 1, 100);
        console.log(arr5);   // 删除的结果
        console.log(result5);// 被删除的元素


    }
}

参考：https://baijiahao.baidu.com/s?id=1669606192664933027&wfr=spider&for=pc