从JavaScript对象中随机选择值 [英] randomly select value from a JavaScript object
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问题描述
如何从对象中选择随机值(属性及其键)并将每个值附加到特定div?
How do I select random value (property and its key) from the object and append each one to specific div?
<div id="propertydiv"></div>
<div id="valuediv"></div>
var student = {
name : "John Doe",
age : "28",
gender : "Male"
};
推荐答案
如果你把对象的键放在一个数组中那么你可以随意选择一个,可能是这样的:
If you put the object's keys in an array then you can easily select one at random, maybe a little something like this:
var student = { name : "John Doe", age : "28", gender : "Male" };
var keys = Object.keys(student);
var randomKey = keys[Math.floor(Math.random()*keys.length)];
var randomValue = student[randomKey];
document.getElementById("propertydiv").innerHTML = randomKey;
document.getElementById("valuediv").innerHTML = randomValue;
<div id="propertydiv"></div>
<div id="valuediv"></div>
(多次运行以上代码段)看到随机行为。)
(Run the snippet above several times to see the random behaviour.)
Furthe阅读:
Object.keys()
Math.random()
Math.floor()
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