Given an array of integers citations where citations[i] is the number of citations a researcher received for their ith paper, return the researcher's h-index.

According to the definition of h-index on Wikipedia: The h-index is defined as the maximum value of h such that the given researcher has published at least h papers that have each been cited at least h times.

Input: citations = [3,0,6,1,5] Output: 3 Explanation: [3,0,6,1,5] means the researcher has 5 papers in total and each of them had received 3, 0, 6, 1, 5 citations respectively. Since the researcher has 3 papers with at least 3 citations each and the remaining two with no more than 3 citations each, their h-index is 3.

var hIndex = function(citations) {
    let hIndex = 0;
    citations.sort((a, b) => a - b);
    citations.forEach((item,index) => {
        console.log(index,hIndex,item,citations.length - index)
        hIndex = Math.max(
            hIndex, Math.min(item, citations.length - index)
        )
    })
    return hIndex
};