function setIndexValues(arr) {
    let newArr = [];

    for (let i = 1; i < arr.length; i++){
        let currentArgs = arr[i].split(" - ");
        newArr[currentArgs[0]] = currentArgs[1];
    }
    for (let i = 0; i < newArr.length; i++){
        if (!newArr[i] === "undefined") {
            console.log(0)
        } else {
            console.log(newArr[i])
        }
    }
}
console.log(setIndexValues(["2", "0 - 5", "0 - 6", "0 - 7"]));