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JavaScript Design Patterns for Coding Interviews

Challenge: Command Pattern

Explore the command pattern by modifying a JavaScript bank account example. Learn to separate commands, receivers, and invokers to perform operations, improving your grasp of behavioral design patterns for coding interviews.

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Problem statement

Study and run the code snippet below:

Node.js
class BankAccount {
    constructor(amount){
        this.amount = amount
    }
  checkAmount() {
      console.log(this.amount)
  }
  
  withdrawMoney(withdrawamount) {
    if(withdrawamount > this.amount){
        console.log("Not enough money")
    }
    else{
        this.amount -=  withdrawamount
    }
  }
   depositAmount(money){
        this.amount += money
    }
}
var account = new BankAccount(100)
account.checkAmount()
account.withdrawMoney(10)
account.checkAmount()
account.depositAmount(50)
account.checkAmount()

In the code above, you have a BankAccount class. You can check the amount in the account using the checkAccount function, withdraw a certain amount using the withdrawMoney function, and deposit an amount using the depositAmount function. ...