Delete_Occurances.js

/*Delete occurrences of an element if it occurs more than n times:

Given a list and a number, create a new list that contains each number of list at most N times, without reordering.

For example if the input number is 2, and the input list is [1,2,3,1,2,1,2,3], you take [1,2,3,1,2], drop the next [1,2] since this would lead to 1 and 2 being in the result 3 times, and then take 3, which leads to [1,2,3,1,2,3].

With list [20,37,20,21] and number 1, the result would be [20,37,21].*/

//find out how many times the number repeat
//put them into a new list


function deleteNth(arr, n) {
    const count ={};
    const newArr=[];

    arr.forEach((num)=>{
        if (count[num]){
            if (count[num] < n){
                newArr.push(num);
                count[num]++;
            }
        }else{
            newArr.push(num);
            count[num] = 1
        }
    });
    return newArr
}