檢索.json對象並將其存儲在變量中

Question

我的.json文件是：

{
"links":[
  {source: "algorithms cormen", target: "irodov", type: "default"},
  {source: "algorithms cormen", target: "skienna", type: "default"},
  {source: "irodov", target: "skienna", type: "default"},
  {source: "irodov", target: "algorithms cormen", type: "default"}
],
"data":[
    {node: "algorithms cormen", data: "bible of algos"},
    {node: "irodov", data: "bibile of physics"},
    {node: "skienna", data: "cool book"}
]
}

現在在我的javascript文件中，我希望“鏈接”存儲的數據進入鏈接變量。 我想對“數據”做同樣的事情如何實現此目的？ 我正在使用d3.js庫，因此如果該庫中包含一些我可以使用的功能，請提及它們。

Answer 1

只需解析JSON並將值分配給變量即可：

var json; // I am assuming this is populated with your JSON string
var jsonObj = JSON.parse(json);
var links = jsonObj.links;
var data = jsonObj.data;

Answer 2

將json文件更新為（假設您通過網頁加載而不是通過ajax包含json文件）

var json-data = { 
     "links":[
         {source: "algorithms cormen", target: "irodov", type: "default"},
         {source: "algorithms cormen", target: "skienna", type: "default"},
         {source: "irodov", target: "skienna", type: "default"},
         {source: "irodov", target: "algorithms cormen", type: "default"}
],
    "data":[
        {node: "algorithms cormen", data: "bible of algos"},
        {node: "irodov", data: "bibile of physics"},
        {node: "skienna", data: "cool book"}
    ]
} 

然后訪問

var links = json-data.links; 
var data = json-data.data;