[프로그래머스] 폰켓몬 (Javascript)

link ⛓ https://school.programmers.co.kr/learn/courses/30/lessons/1845 

프로그래머스

 

 

function solution(nums) {
    var answer = 0;
    let obj = {};
    let N = nums.length /2;
    
    nums.map(item => {
        if(obj[item]){
            obj[item] += 1;
        }else{
            obj[item] = 1;
        }
    })
    
    const obj_length = Object.keys(obj).length;
    
    if(obj_length <= N){
        return obj_length;
    }else{
        return N
    }
    
    return answer;
}