随机点名var arr=["小明","老王","老赵","小王","大王","老王"]
时间: 2023-05-17 10:05:06 浏览: 127
我可以使用 JavaScript 的 Math.random() 函数和数组的索引来随机点名,代码如下:
var arr = ["小明", "老王", "老赵", "小王", "大王", "老王"];
var randomIndex = Math.floor(Math.random() * arr.length);
var selectedName = arr[randomIndex];
console.log("随机点名结果:" + selectedName);
注意:这只是一个简单的示例,实际应用中需要考虑数组为空或者只有一个元素的情况,以及去重等问题。
相关问题
交换下标2和4的位置var arr=["小明","老王","老赵","小王","大王","老王"]
可以使用以下代码交换下标2和4的位置:
var temp = arr[2];
arr[2] = arr[4];
arr[4] = temp;
最终的数组为:["小明","老王","大王","小王","老赵","老王"]
1.把名字带王字的都修改成老王var arr=["小明","老王","老赵","小王","大王","老王"]
var newArr = arr.map(function(name) {
if (name.includes("王")) {
return "老王";
} else {
return name;
}
});
console.log(newArr); // ["小明", "老王", "老赵", "老王", "老王", "老王"]