使用nodejs將JSON數據整理到一個較小的文件中

Question

我有一個很大的JSON文件，我正在嘗試拉出特定的鍵塊，但不確定如何執行此操作。

當前的JSON文件：

{
    "blockID1": {
        "name": "name here",
        "locale": "en_GB"
    },
    "blockID2": {
        "name": "name here",
        "locale": "en_GB"
    },
    "blockID3": {
        "name": "name here",
        "locale": "en_GB"
    },
    "blockID4": {
        "name": "name here",
        "locale": "en_GB"
    }
}

我只想檢索blockID3和blockID4，然后將其輸出到另一個json文件中。

{
       "blockID3": {
            "name": "name here",
            "locale": "en_GB"
        },
        "blockID4": {
            "name": "name here",
            "locale": "en_GB"
        }
    }

有人有例子嗎？

Answer 1

使用數組作為查找，然后在對象上循環，如果找到鍵，則將值復制到輸出對象。

 var obj = {"blockID1":{"name":"name here","locale":"en_GB"},"blockID2":{"name":"name here","locale":"en_GB"},"blockID3":{"name":"name here","locale":"en_GB"},"blockID4":{"name":"name here","locale":"en_GB"}}; var find = ['blockID3', 'blockID4']; var out = {}; for (var p in obj) { if (find.indexOf(p) > -1) { out[p] = obj[p]; } } console.log(out); 

Answer 2

不知道我是否理解您的問題，但是如果您想輸出類似的內容，並且您想要獲取json文件的ID，則可以簡單地執行以下操作

    const props = ['blockID3', 'blockID4'],
          json = {"blockID1":{"name":"name here","locale":"en_GB"},"blockID2":{"name":"name here","locale":"en_GB"},"blockID3":{"name":"name here","locale":"en_GB"},"blockID4":{"name":"name here","locale":"en_GB"}},
          res   = {};

    for(const prop of props) {
      if(json[prop]) { 
        res[prop] = prop;    
      }    
    });

最后，res將具有您想要的對象，希望這會有所幫助:)