javascript - 返回干净 json 对象的快速路由

Question

我有这条快速路线，可以返回每月的汽车犯罪数量。在变量记录中，进一步解释一下，{"1":[{"1":2}]，其中第一个 1 是 query#1，接下来的 1 表示一月为第一天一年中的月份。最后，2 表示 1 月份的犯罪数量。

app.get('/carnapping-route', function(req, res){  
    var records1 = [{"1":[{"1":2}],"2":[{"2":1}],"3":[{"3":2}],"4":[{"4":1}],"5":[{"5":1}],"6":[{"6":1}],"7":[{"7":1}],"8":[{"8":1}],"9":[{"9":1}],"10":[{"10":1}],"11":[{"11":1}],"12":[{"12":1}]}];
    var counts = [ ];
    for (var i = 1; i <= 12; i++) {
        var key = i + "";
        counts.push(records[0][key][key]);
    }   
        res.send(counts);               
});

我得到的不是[2,1,2,1,1,1,1,1,1,1,1,1]，而是[null,null,null ,null,null,null,null,null,null,null,null,null]

我错过了什么？

Answer 1

在您的数据结构中，records[0][key] 变量中有一个数组。所以你需要在push方法中使用records[0][key][0][key]

var records1 = [{"1":[{"1":2}],"2":[{"2":1}],"3":[{"3":2}],"4":[{"4":1}],"5":[{"5":1}],"6":[{"6":1}],"7":[{"7":1}],"8":[{"8":1}],"9":[{"9":1}],"10":[{"10":1}],"11":[{"11":1}],"12":[{"12":1}]}];
var counts = [ ];
for (var i = 1; i <= 12; i++) {
    var key = i + "";
    counts.push(records1[0][key][0][key]);
}
//res.send(counts); 
document.getElementById("result").innerHTML=counts;

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