let candies = [16, 39, 67, 16, 38, 71]
let threshold = 17;

console.log(sugarHigh(candies, threshold))

function sugarHigh(candies, threshold){
    let candiesSort
    var dict = []
    for(let i =0; i < candies.length; i++){
        dict.push({
            key:   i,
            value: candies[i]
        })
    }
    candiesSort = candies.slice()
    candiesSort.sort()
    let indices = []
    let sumOfSugar = 0
    for(let i = 0; i < candiesSort.length; i++){
        if(sumOfSugar + candiesSort[i] <= threshold){
            sumOfSugar += candiesSort[i]
            indices.push(Object.keys(dict).find(key => dict[key].value === candiesSort[i]))
        }
    }

    return indices
}