Question

我有一个看起来像这样的数组

var x = [
    {
        "name" : "Paris",
        "count" : [1,30, 20]
    },{
        "name" : "London",
        "count" : [5,30, 10]
    }
]

我试图通过添加属性的数字来解决这个问题＆＃34; count＆＃34;

var y = [
    {
        "name" : "Paris",
        "count" : 51
    },{
        "name" : "London",
        "count" : 45
    }
]

这是我的代码

var y = []
function doTotal(x, i){
    var out = 0;
    for(var j = 0; j < x[i].count.length; j++){
        out += x[i].count[j];
    }
}
for(var i = 0; i < x.length; i++){
    y[i] = {
        name : x[i].name,
        total : doTotal(x, i)
    }
}

console.log(y)

..总数未定义。我做错了什么？

Answer 1

您需要在out函数

中返回变量dototal

＆＃13;

var x = [
    {
        "name" : "Paris",
        "count" : [1,30, 20]
    },{
        "name" : "London",
        "count" : [5,30, 10]
    }
]
var y = [
    {
        "name" : "Paris",
        "count" : 51
    },{
        "name" : "London",
        "count" : 45
    }
]
function doTotal(x, i){
    var out = 0;
    for(var j = 0; j < x[i].count.length; j++){
        out += x[i].count[j];
    }
    return out;
}
for(var i = 0; i < x.length; i++){
    y[i] = {
        name : x[i].name,
        total : doTotal(x, i)
    }
}
alert(JSON.stringify(y));

＆＃13;

添加数组的值存储为对象的属性

1 个答案: