How to compare value in 2 different array of object in javascript

I’m trying to compare this array of object :

"platforms": [
        {
            "id": 1,
            "name": "KF",
            "bankAccounts": [
                {
                    "id": 22,
                    "balance": -100,
                    "lendingPlatformId": 3
                },
                {
                    "id": 27,
                    "balance": 500,
                    "lendingPlatformId": 4
                }
            ],
        },
        {
            "id": 3,
            "name": "CC",
            "bankAccounts": [
                {
                    "id": 23,
                    "balance": 100,
                    "lendingPlatformId": 1
                }
            ],
        },
        {
            "id": 4,
            "name": "DD",
            "bankAccounts": [
                {
                    "id": 28,
                    "balance": 0,
                    "lendingPlatformId": 1
                }
            ],
        }
    ]

I want to compare the platform[].id and match bankAccounts[].lendingPlatformId

for example:

bankAccounts[].id = 22, its lendingPlatformId = 3, so it need to find platform[].id = 3 and bankAccounts[].id = 23 and lendingPlatformId = 1 ,then compare their balance’s sum is equal to zero, than push to new array.

expecting result is one new array:

isEqualToZero = [true, false, true, false]

(order is matter)

I’m thinking make it new object like:

platofmrId = 1 :{ lendingPlatformId: 3, balance:100 }, {lendingPlatformId: 4, balance:500 }

platofmrId = 3 :{ lendingPlatformId: 1, balance:-100 }

but seems it can’t achieve what i want

i’ve no idea how to do it…

please help, Thanks!

>Solution :

const res=[] //to save result
platforms.forEach(platform=>{ //go through platforms
platform.bankAccounts.forEach(bank=>{ //go through platform bank account
    // to get lendingPlatform
    const lendPlatform=platforms.find(p=>p.id==bank.lendingPlatformId);
    //add the balance and compare 
    if((lendPlatform.bankAccounts[0].balance+bank.balance)==0)
        res.push(true) // if combined balance is zero
    else
        res.push(false) 
})})
console.log(res)