随机数组排序方法Javascript [关闭]

Posted 2023-02-22

【中文标题】随机数组排序方法Javascript [关闭]

【英文标题】：Random Array Sort Method Javascript [closed]

【发布时间】：2022-01-17 12:20:21

【问题描述】：

目前我正在构建一个测验应用程序，它以随机顺序显示一个带有正确和 3 个错误答案的动词。 类是：

class IrregularVerb 
    constructor(verb, right, wrongFirst, wrongSecond, wrongThird) 
        this._verb = verb;
        this._right = right;
        this._wrong = [wrongFirst, wrongSecond, wrongThird];
    

    randomOrder() 
        return this._wrong.sort(0.5 - Math.random());
    


const irregularVerbList = [
    new IrregularVerb("read", "read", "rode", "ride", "ridden"),
    new IrregularVerb("go", "went", "gone", "got", "god")
]


const randomWrongAnswer = irregularVerbList[randomNumber].randomOrder;

randomWrongAnswer 应该以随机顺序返回一个包含最后 3 个对象参数的数组，但它显示“函数 randomOrder()”。方法声明或其调用是否错误？

【问题讨论】：

您必须调用该方法。括号不见了。您只是分配了函数对象而不是函数调用的结果。

【参考方案1】：

需要解决的 3 件事

class IrregularVerb 
  constructor(verb, right, wrongFirst, wrongSecond, wrongThird) 
    this._verb = verb;
    this._right = right;
    this._wrong = [wrongFirst, wrongSecond, wrongThird];
  

  randomOrder() 
    return this._wrong.sort(()=>0.5 - Math.random());
    //                      ^^^^  Need these parentheses and fat arrow
    //                            to make it a function
  


const irregularVerbList = [
  new IrregularVerb("read", "read", "rode", "ride", "ridden"),
  new IrregularVerb("go", "went", "gone", "got", "god")
]


const randomNumber = Math.floor(Math.random()*2)
// Need this so that randomNumber is not undefined

const randomWrongAnswer = irregularVerbList[randomNumber].randomOrder();
//                           Need this to actually call the function ^^
console.log(randomWrongAnswer)

【讨论】：

感谢您的帮助，语法对我来说很新。祝您有美好的一天！