获取随机元素的通用方法:

让some_array =[‘简’,2月,3月,4月,“可能”); Let months = random_elems(some_array, 3); console.log(个月); 函数random_elems(arr, count) { 让len = arrr .length; 让查找= {}; Let TMP = []; If (count > len) Count = len; 对于(设I = 0;I < count;我+ +){ 让指数; {做 index = ~~(Math.random() * len); } while(查找中的索引); 查找[index] = null; tmp.push (arr(指数)); ｝ 返回tmp; ｝

var item = myArray[Math.floor（Math.random（）*myArray.length）];

或相当短的版本:

var item = myArray[（Math.random（）*myArray.length）|0];

示例代码:

var myArray = ['January'， 'February'， 'March']; var item = myArray[(Math.random()*myArray.length)|0]; console.log(“项目:”,项目);

简单功能:

var myArray = ['January', 'February', 'March'];
function random(array) {
     return array[Math.floor(Math.random() * array.length)]
}
random(myArray);

OR

var myArray = ['January', 'February', 'March'];
function random() {
     return myArray[Math.floor(Math.random() * myArray.length)]
}
random();

OR

var myArray = ['January', 'February', 'March'];
function random() {
     return myArray[Math.floor(Math.random() * myArray.length)]
}
random();

为了寻找一句真正的俏皮话，我得出了这个结论:

['January', 'February', 'March'].reduce((a, c, i, o) => { return o[Math.floor(Math.random() * Math.floor(o.length))]; })

获取随机元素的通用方法:

让some_array =[‘简’,2月,3月,4月,“可能”); Let months = random_elems(some_array, 3); console.log(个月); 函数random_elems(arr, count) { 让len = arrr .length; 让查找= {}; Let TMP = []; If (count > len) Count = len; 对于(设I = 0;I < count;我+ +){ 让指数; {做 index = ~~(Math.random() * len); } while(查找中的索引); 查找[index] = null; tmp.push (arr(指数)); ｝ 返回tmp; ｝

如果您有固定的值(如月份名称列表)，并且想要一行解决方案

var result = ['January', 'February', 'March'][Math.floor(Math.random() * 3)]

数组的第二部分是一个访问操作，如在JavaScript中为什么[5,6,8,7][1,2]= 8所描述的那样?