// Create an array of 1000 random intergers between 1 and 10000

var arrRandom = [];

for(var intCtr=0; intCtr<1000; intCtr++) {

  arrRandom.push(Math.floor(Math.random() * Math.floor(10000)));

}

​

function reduceCallback(accum, curr) {

    return accum.add(curr);

}

​

function doRedeuce(pArray) {

    return pArray.reduce(reduceCallback, new Set());

}

function doLoop(pArray) {

    var accum = new Set();

    for(const item of pArray) {

        accum.add(item);

    }

    return accum;

}