indexOfMax = (arr) => {

    let max = arr[0]
    let maxIndex = 0
    //console.log(arr)
    for (var i = 1; i < arr.length; i++) {
        console.log(arr)
        console.log(i)
        console.log(arr[i])
        if (arr[i] > max) {
            //console.log(arr[i])
            maxIndex = i
            max = arr[i]
        }
    }
    console.log(maxIndex)
    return maxIndex
}