从 JavaScript 数组中获取随机值
2022-08-29 22:07:57
考虑:
var myArray = ['January', 'February', 'March'];
如何使用JavaScript从此数组中选择随机值?
考虑:
var myArray = ['January', 'February', 'March'];
如何使用JavaScript从此数组中选择随机值?
这是一个简单的单行:
const randomElement = array[Math.floor(Math.random() * array.length)];
例如:
const months = ["January", "February", "March", "April", "May", "June", "July"];
const random = Math.floor(Math.random() * months.length);
console.log(random, months[random]);
如果您的项目中已经包含下划线或 lodash,则可以使用 _.sample
。
// will return one item randomly from the array
_.sample(['January', 'February', 'March']);
如果需要随机获取多个项目,则可以将其作为下划线中的第二个参数传递:
// will return two items randomly from the array using underscore
_.sample(['January', 'February', 'March'], 2);
或者在 lodash 中使用 _.sampleSize
方法:
// will return two items randomly from the array using lodash
_.sampleSize(['January', 'February', 'March'], 2);