View difference between Paste ID: JkBnQn99 and c8LWGz0h

 class Bank {
   constructor(bankName) {
     this._bankName = bankName;
     this.allCustomers = [];
   }
 
   newCustomer({ firstName, lastName, personalId }) {
     let hasCustomer = this.allCustomers.find(
       (customer) => customer.personalId === personalId
     );
 
     if (hasCustomer) {
       throw new Error(`${firstName} ${lastName} is already our customer!`);
     }
 
     let customer = { firstName, lastName, personalId };
     this.allCustomers.push(customer);
 
     return customer;
   }
 
   depositMoney(personalId, amount) {
     let currentCustomer = this.getCustomerById(personalId);
 
     if (currentCustomer.totalMoney) {
       currentCustomer.totalMoney += amount;
     } else {
       currentCustomer.totalMoney = amount;
       currentCustomer.transactions = [];
     }
 
     currentCustomer.transactions.push(
       `${currentCustomer.firstName} ${currentCustomer.lastName} made deposit of ${amount}$!`
     );
 
     return `${currentCustomer.totalMoney}$`;
   }
 
   withdrawMoney(personalId, amount) {
     let currentCustomer = this.getCustomerById(personalId);
 
     if (currentCustomer.totalMoney < amount) {
       throw new Error(
         `${currentCustomer.firstName} ${currentCustomer.lastName} does not have enough money to withdraw that amount!`
       );
     } else {
       currentCustomer.totalMoney -= amount;
       currentCustomer.transactions.push(
         `${currentCustomer.firstName} ${currentCustomer.lastName} withdrew ${amount}$!`
       );
     }
 
     return `${currentCustomer.totalMoney}$`;
   }
 
   customerInfo(personalId) {
     let currentCustomer = this.getCustomerById(personalId);
 
     let output = `Bank name: ${this._bankName}\nCustomer name: ${currentCustomer.firstName} ${currentCustomer.lastName}\nCustomer ID: ${personalId}\nTotal Money: ${currentCustomer.totalMoney}$\n`;
 
     if (currentCustomer.transactions.length > 0) {
         output += 'Transactions:\n';
         for(let i = currentCustomer.transactions.length; i > 0; i-- ) {
             output += `${i}. ${currentCustomer.transactions[i - 1]}\n`;
         }
     }
 
     return output.trim();
   }
 
   getCustomerById(personalId) {
     let currentCustomer = this.allCustomers.find(
       (customer) => customer.personalId === personalId
     );
 
     if (!currentCustomer) {
       throw new Error(`We have no customer with this ID!`);
     }
 
     return currentCustomer;
   }
 }