function add(a, b) {
    return a + b;
}

const newAdd = (a, b) => a + b;

const operate = (op1, op2, operation) => operation(op1, op2)

// console.log(operate(5, 10, (a, b) => a + b))

const arrayOperation = (arr, opOnEle) => {
    for (i = 0; i < arr.length; i++) {
        opOnEle(arr[i])
    }
}

const arr1 = [1, 10, 20, 30, 40];
// arrayOperation([10, 20, 30], (ele) => console.log(ele))

// arr1.forEach((ele) => console.log(ele))

// ----------------------------------
// [1,2,3,4]   ->  [1,4,9,16]
const mapOperation = (arr, operation) => {
    const result = []
    for (i = 0; i < arr.length; i++) {
        const res = operation(arr[i])
        result.push(res)
    }
    return result
}

const filterOperation = (arr, condition) => {
    const result = [];
    for (i = 0; i < arr.length; i++) {
        const r = condition(arr[i])
        if (r) {
            result.push(arr[i])
        }
    }
    return result;
}
// console.log(filterOperation(arr1, (ele) => ele % 2 == 0))


// console.log(mapOperation(arr1, (ele) => ele * ele))
// console.log(mapOperation(arr1, (ele) => ele * ele * ele))
// console.log(arr1.map((ele) => ele * ele))
// console.log(arr1.filter((e) => e % 2 == 0))


const student = {
    name: "mahadev",
    college: "jspm",
    roll: 10
}
// console.log(student["name"])

// find all students of JSPM college and having marks
// greater than 20% and return rollNumbers of them

const students = [
    {
        name: "mahadev",
        college: "jspm",
        roll: 10,
        marks: 30
    },
    {
        name: "mahadev1",
        college: "BSIOTR",
        roll: 11,
        marks: 20
    },
    {
        name: "mahadev2",
        college: "jspm",
        roll: 12,
        marks: 10
    }
]

students.filter(s => s.college == "jspm")

const rolls = students.filter((student) => student.college == "jspm")
    .filter((student) => student.marks > 20)
    .map(student => student.roll)

// console.log(rolls)

const task = (success, failure) => {
    console.log("data is performing certaion operation")
    console.log("searching for mobile num,ber")
    setTimeout(() => {
        console.log("task got failed ")
        const resultOfTask = 9096969220;
        failure(resultOfTask)
    }, 1000)
}
const dattasPromise = new Promise(task)
const suuccessCallback = (result) => {
    console.log("I got mobile number from datta", result)
    console.log("calloing that numnber")
}
const failureCallback = (err) => {
    console.log("Datta has failed to perform operation and here is error: ", err)
    console.log("I may try to do some other way")
}
dattasPromise.then(suuccessCallback).catch(failureCallback)
console.log("assigned operation to datta and continueing my other work")