循环不会搜索整个对象数组？

Question

对于 javascript，我有一个对象数组，我想查看用户的条目是否与我的数组中三个对象中的任何一个的属性中的 2 个匹配。出于某种原因，我的“for 循环”仅适用于第一个对象，但从不检查其他两个对象。我该如何解决这个问题？

class Customer {
  constructor(fN, lN, bal, cID, pass) {
    this.firstName = fN;
    this.lastName = lN;
    this.balance = bal;
    this.customerID = cID;
    this.password = pass;
  }
}

const bankers = [];
bankers.push(new Customer("Jack", "Scott", 3689.21, "4552", "2811"));
bankers.push(new Customer("John", "Smith", 2500.00, "4553", "1234"));
bankers.push(new Customer("Albert", "Price", 100000.00, "4554", "6189"));

let userID = prompt(`Please enter your customer ID.`);
let userPass = prompt(`Please enter your password.`);

for (let i = 0; i < bankers.length; i++) {
  if (bankers[i].customerID === userID && bankers[i].password === userPass) {
    console.log('Yay'); break;
  } else {
    console.log('boo'); break;
  }
}

我的“for 循环”仅在我为第一个客户测试时才有效。如果我尝试为其他两个输入客户 ID 或密码，则会失败。为什么会这样？我认为i 变量应该遍历所有 3 个对象

Answer 1

两件事 - 第一，您在 Jack 前面缺少引用。第二，您需要在每次循环运行时重新定义变量 - 将您的 userID 和 userPass 声明移入您的循环：

class Customer {
  constructor(fN, lN, bal, cID, pass) {
    this.firstName = fN;
    this.lastName = lN;
    this.balance = bal;
    this.customerID = cID;
    this.password = pass;
  }
}

const bankers = [];
bankers.push(new Customer("Jack", "Scott", 3689.21, "4552", "2811"));
bankers.push(new Customer("John", "Smith", 2500.00, "4553", "1234"));
bankers.push(new Customer("Albert", "Price", 100000.00, "4554", "6189"));

for (let i = 0; i < bankers.length; i++) {
  let userID = prompt(`Please enter your customer ID.`);
  let userPass = prompt(`Please enter your password.`);
  if (bankers[i].customerID === userID && bankers[i].password === userPass) {
    console.log('Yay');
  } else {
    console.log('boo');
  }
}

编辑

基于 cmets，我相信您想像这样使用some：

class Customer {
  constructor(fN, lN, bal, cID, pass) {
    this.firstName = fN;
    this.lastName = lN;
    this.balance = bal;
    this.customerID = cID;
    this.password = pass;
  }
}

const bankers = [];
bankers.push(new Customer("Jack", "Scott", 3689.21, "4552", "2811"));
bankers.push(new Customer("John", "Smith", 2500.00, "4553", "1234"));
bankers.push(new Customer("Albert", "Price", 100000.00, "4554", "6189"));

  let userID = prompt(`Please enter your customer ID.`);
  let userPass = prompt(`Please enter your password.`);
  if (bankers.some(banker => banker.customerID == userID && banker.password == userPass)) {
    console.log('Yay');
  } else {
    console.log('boo');
  }