Day 6:Filter Elements from Array

Given an integer array arr and a filtering function fn, return a filtered array filteredArr.

The fn function takes one or two arguments:

arr[i] - number from the arr
i - index of arr[i]
filteredArr should only contain the elements from the arr for which the expression fn(arr[i], i) evaluates to a truthy value. A truthy value is a value where Boolean(value) returns true.

Please solve it without the built-in Array.filter method.

var filter = function(arr, fn) {
    
};

Example 1:
Input: arr = [0,10,20,30], fn = function greaterThan10(n) { return n > 10; }
Output: [20,30]

Example 2:
Input: arr = [1,2,3], fn = function firstIndex(n, i) { return i === 0; }
Output: [1]

Example 3:
Input: arr = [-2,-1,0,1,2], fn = function plusOne(n) { return n + 1 }
Output: [-2,0,1,2]

var filter = function(arr, fn) {
    let result = [];
    for (let i = 0; i < arr.length; i++) {
        if (fn(arr[i], i)){
            result.push(arr[i])
        };
    };
    return result;
};