创建空构造函数并在 class 中初始化数组时出现问题

Question

I have tried moving the array before, after the constructor. I am pretty sure I have the syntax wrong at this point, I have tried researching for quite some time without luck. Any help would be appreciated.

class dataService {
  constructor() {
  }

  //I need to be able to initialize this array of objects and create an empty constructor which does nothing

  var data = [ // Error: Construcotr, method, accessor, or property was expected
  name1 = { name: "Mitchell", gender: "male", address: "201 Burns Street East", age: 20, phoneNumber: "905-550-7379" },
  name2 = { name: "Bob", gender: "male", address: "555 Hello Street", age: 25, phoneNumber: "123-456-7891" },
  name3 = { name: "Gillian", gender: "female", address: "457 Baker Street", age: 23, phoneNumber: "555-111-999" }
];

getData(numRecords) {
  numRecords = numRecords || undefined;
  if (numRecords == undefined) {
    return data;
  }
};


}

Answer 1

Hey my friend you have several errors on how you define properties of classes, i recommend to you to check out javascript classes

mozilla javscript classes documentation and examples

first you have a mistake on array definition, this is the right way:

  this.data = [ 
  { name: "Mitchell", gender: "male", address: "201 Burns Street East", age: 20, phoneNumber: "905-550-7379" },
   { name: "Bob", gender: "male", address: "555 Hello Street", age: 25, phoneNumber: "123-456-7891" },
  { name: "Gillian", gender: "female", address: "457 Baker Street", age: 23, phoneNumber: "555-111-999" }
];

Second you can initialize you array on the constructor and assign to the class with the "this" keyword.

I made a working example for you base on your code:

js online example

Peace, mis perros !