map with requests

function sendRequest(value, key, map) {
    // make request..
}

var userIdSet = new Set("123", "124", "125");
var referenceSet = new Set("https://123", "https://124", "https://125");

var referenceMap = new Map();

for (var i = 0; i < userIdSet.size(); i++) {
    referenceMap.set(userIdSet[i], referenceSet[i]);
}

referenceMap.forEach(sendRequest);