javascript - 我可以让这个功能更简洁吗

Question

我有这个 javascript 片段，我想知道我是否可以在 reduce 函数的单次传递中计算出 amount 和 users？

root.children.forEach(function(v) {

    v.amount = v.children.reduce(function(a, b) {
        console.log(a);
        return {
            amount: a.amount + b.amount
        }
    }, {
        'amount': 0
    }).amount

    v.users = v.children.reduce(function(a, b) {
        console.log(a);
        return {
            users: a.users + b.users
        }
    }, {
        'users': 0
    }).users

})

Answer 1

是的，你可以像下面那样做，

root.children.forEach(function(v) {
    var obj = v.children.reduce(function(a, b) {
        a.amount += b.amount;
        a.users += a.users;
    }, {'amount': 0, 'users' : 0 });
    v.amount = obj.amount;
    v.users = obj.users;
});