控制台记录javascript时，Math.random返回相同的值[重复]答案

【问题标题】：Math.random returning same value when console logged javascript [duplicate]控制台记录javascript时，Math.random返回相同的值[重复]
【发布时间】：2022-01-15 12:34:45
【问题描述】：

这是我的代码

// import user input prompt 
var inquirer = require('inquirer');
var emptyFamArray = [];

// ask the user how many relatives do they have

const getQuestions = () => {
    inquirer.prompt([
      {
        name: "relatives_names",
        type: 'input',
        message: "Please input family first names seperated by a space. only 1-10 family members please!",
        
    },
    ]).then((answers => {
        // console.log(answers)
        let test1 = JSON.stringify(answers.relatives_names).split(' ');
        // console.log(test1);
       
        let randomArrayName = test1[Math.floor(test1.length * Math.random())]
        let randomArrayNameTwo = test1[Math.floor(test1.length * Math.random())]
        console.log(randomArrayName)
    
  
        if(test1.length > 10){
            console.log('to many names please input 10 or less')
        } else if (test1.length == 9){

           
            console.log(randomArrayName + " Gets " + randomArrayNameTwo + " for christmas pickings!");
        
         
        }else if (test1.length == 5){
            console.log(randomArrayName + " Gets " + randomArrayNameTwo + " for christmas pickings!");
            console.log(randomArrayName + " Gets " + randomArrayNameTwo + " for christmas pickings!");
            console.log(randomArrayName + " Gets " + randomArrayNameTwo + " for christmas pickings!");
            console.log(randomArrayName + " Gets " + randomArrayNameTwo + " for christmas pickings!");
            console.log(randomArrayName + " Gets " + randomArrayNameTwo + " for christmas pickings!");

当它在控制台记录时，它会随机化名称，但它只会一遍又一遍地返回相同的值

例子

kylee Gets gerald for christmas pickings!
kylee Gets gerald for christmas pickings!
kylee Gets gerald for christmas pickings!

我将如何解决这个问题？我卡住了，不完全确定每次登录时如何使变量随机化

谢谢

【问题讨论】：

您多次引用randomArrayName 和randomArrayNameTwo，但这些绑定只设置一次。为什么你认为它们会有所不同？

标签： javascript node.js arrays if-statement

【解决方案1】：

当您打印到控制台时，随机选择已经发生，并且仅发生在在您打印出名称之前。要使其每次选择一个随机名称，请将选择转换为每次要打印到控制台时都会调用的函数。例如：

var selectRandomName = function(names) {
 return names[Math.floor(names.length * Math.random())]
}

console.log(selectRandomName(names) + " GETS " + selectRandomName(names) + " for Christmas pickings!");

显然这过于简单了，您可能还应该防止两次选择相同的名称和其他类似情况，但这超出了当前问题的范围。我认为这是某种练习，因为在现实世界的应用程序中，您应该使用一些现成的匹配库。

【讨论】：