objects/objects-references.js

let myAccount = {
    name: 'Andrew',
    expenses: 0,
    income: 0
}

let addExpense = function (account, amount) {
    account.expenses = account.expenses + amount
    console.log(`${amount} in expensese logged for account ${account.name}.`)
}

// addIncome
let addIncome = function (account, amount) {
    account.income = account.income + amount
    console.log(`${amount} in income logged for account ${account.name}.`)
}

// resetAccount 
let resetAccount = function(account) {
    account.expenses = 0
    account.income = 0
    console.log(`Account for ${account.name} has been reset.`)
}

// getAccountSummary
// Account for Andrew has $900. $1000 in income. $100 in expenses.
let getAccountSummary = function(account) {
    console.log(`Account for ${account.name} has ${(account.income) - (account.expenses)}. ${account.income} in income. ${account.expenses} in expenses. `)
}


// addIncome
// addExpense
// getAccountSummary
// resetAccount
// getAccountSummary

addIncome(myAccount, 1000)
addExpense(myAccount, 50)
addExpense(myAccount, 50)
getAccountSummary(myAccount)
resetAccount(myAccount)
getAccountSummary(myAccount)