non_unique_elements.js

var numbers = [1,3,3,4,4,4]

function countDuplicate(numbers){
    //write your code here
    //var result = {}
    var result = {}
    numbers.forEach(function(x){
        result[x] = (result[x] || 0) + 1;
    });
    numbers.filter((item,x)=>numbers.indexOf(item)==x)
    //console.log(result)
    for(let k in result){
        //Do stuff where key would be 0 and value would be the object
        if (result[k] == 1 ){
            delete result[k]
        }
    }
    console.log(Object.keys(result).length)
    for(let x in result){
        var arr = [];
        arr.push(x)
        console.log(x)
    }
    //var energy = arr.join(" ");
    console.log(arr)
    console.log("There are " + Object.keys(result).length + " non unique elements in the array" + arr.toString())

}

countDuplicate(numbers)