我正在尝试编写一个计票功能,我有一个对象数组,每个对象都有一个名为currentVote
的属性,其值为userId
。我想知道哪个userID投票最多。使用lodash这是我到目前为止所得到的:
function countVotes(players) {
return new Promise(function(resolve, reject) {
//votes should be empty, filled it with some sample values
let votes = ['312139659792875521','360445341989863434', '312139659792875521','360445341989863435','1','9999999999999999999999'];
for (let i = 0, j = players.length; i < j; i++) {
votes.push(players[i].currentVote);
}
let tally = _.chain(votes)
.countBy()
.toPairs()
.sortBy(1).reverse()
.map(0)
.value()[0];
resolve(tally);
});
如果我有多个具有相同投票数的userIds
,我该如何选择随机值。目前似乎总是会选择最小的身份证?
答案 0 :(得分:3)
根据你的问题,我相信你的对象如下,我使用数组方法排序按降序对数组进行排序并拾取第一个元素。希望这可以帮助。
let players = [{
"userId":1,
"currentVotes":2220
},
{
"userId":2,
"currentVotes":383830
},
{
"userId":3,
"currentVotes":6894740
},
{
"userId":4,
"currentVotes":6894740
},
{
"userId":5,
"currentVotes":1
}
];
function getHighestVoteByRandowm(players){
let arrSameVotes = [];
let i = 0;
do{
arrSameVotes.push(players[i]);
temp = players[i].currentVotes;
i++;
}while(players[i].currentVotes == temp);
let rndTill = arrSameVotes.length - 1;
let rndVal = Math.round(Math.random() * rndTill);
return arrSameVotes[rndVal];
}
function sortVotes(a,b){
return b.currentVotes - a.currentVotes;
}
let highestVotesPlayer = getHighestVoteByRandowm(players.sort(sortVotes));
console.log(highestVotesPlayer);
答案 1 :(得分:1)
您可以使用*(p->array+x)
和_.shuffle
。也许是这样的:
_.first