javascript - 如何在迭代中获取 json 名称值而不是索引或 id？

Question

我有以下 json:

var testjson = {
    "Mytest": [{
        "Testing": {
            "static": {
                "name": "first name"
            },
            "key1": "key1 val",
            "key2": 10

        }
    }, {
        "Testing": {
            "static": {
                "name": "second name"
            },
            "key3": 20,
            "key4": true


        }
    }, {
        "Testing": {
            "static": {
                "name": "third name"
            },
            "key5": "key5 val"

        }
    }]
}

我有以下coffeescript: @itemNames = (item for item of @mydata).sort (a,b) -> a>b ，但我将其更改为以下javascript转换:

var mydata = testjson.Mytest;
var item;

this.itemNames = ((function() {
  var results;
  results = [];
  for (item in mydata) {
    results.push(item);
  }
  return results;
}).call(this)).sort(function(a, b) {
  return a > b;
});
console.log(mydata);//gives: [Object, Object, Object] 
console.log(this.itemNames);//gives: ["0", "1", "2"], but I need it like: ["first name", "second name", "third name"], how can I get it ?

在这里，我在控制台中得到的输出为:["0", "1", "2"]，但我需要这样的输出:["first name", “第二个名字”，“第三个名字”]，当然，如果我在控制台上展开它，它应该显示这些值(例如:0:“名字”，1:“第二个名字” ，2:“第三个名字”)。创建Fiddle .

请帮助我了解如何获取这些名称并提前致谢。

Answer 1

你可以这样做。你的项目是元素的索引。你需要获取索引处的元素，然后通过 Testing.static.name< 访问属性 name/.

this.itemNames = ((function() {
  var results;
  results = [];
  for (item in mydata) {
    results.push(mydata[item].Testing.static.name);
  }
  return results;
}).call(this)).sort(function(a, b) {
  return a > b;
});

这是代码。

var testjson = {
    "Mytest": [{
        "Testing": {
            "static": {
                "name": "first name"
            },
            "key1": "key1 val",
            "key2": 10

        }
    }, {
        "Testing": {
            "static": {
                "name": "second name"
            },
            "key3": 20,
            "key4": true


        }
    }, {
        "Testing": {
            "static": {
                "name": "third name"
            },
            "key5": "key5 val"

        }
    }]
};


var mydata = testjson.Mytest;
var item;

this.itemNames = ((function() {
  var results;
  results = [];
  for (item in mydata) {
    results.push(mydata[item].Testing.static.name);
  }
  return results;
}).call(this)).sort(function(a, b) {
  return a > b;
});

console.log(this.itemNames);