whereDoIBelong.js

// Return the lowest index at which a value (second argument) should be inserted into an array (first argument) once it has been sorted. The returned value should be a number.
//
// For example, getIndexToIns([1,2,3,4], 1.5) should return 1 because it is greater than 1 (index 0), but less than 2 (index 1).
//
// Likewise, getIndexToIns([20,3,5], 19) should return 2 because once the array has been sorted it will look like [3,5,20] and 19 is less than 20 (index 2) and greater than 5 (index 1).


function getIndexToIns(arr, num) {

    // sort arr in ascending order
    arr.sort(function(a, b) {
        return a - b;
    });

    var counter = 0;
    while (counter < arr.length) {
        if (num > arr[counter]) {
            counter++;
        } else {
            return counter;
        }
    }
    return arr.length;
}

console.log(getIndexToIns([10, 20, 30, 40, 50], 35)); // 3