使用TypeScript中的屬性名稱將Map轉換為JSON

Question

我想使用Typescript中的屬性名稱將Map轉換為JSON字符串

樣本輸入

Map<string,string[]> myMap; 

let value1:string[] = ["0","1"];
let value2:string[] = ["2","3"];

myMap.set("key1",value1);
myMap.set("key2",value2);

期望的輸出

[  
   {  
      "KeyPropertyName":"key1",
      "ValuePropertyName":[  
         "0",
         "1"
      ]
   },
   {  
      "KeyPropertyName":"key2",
      "ValuePropertyName":[  
         "2",
         "3"
      ]
   }
]

Answer 1

使用Array.prototype.map()

 let myMap = new Map() let value1 = ["0","1"]; let value2 = ["2","3"]; myMap.set("key1",value1); myMap.set("key2",value2); let result = [...myMap].map(([KeyPropertyName, ValuePropertyName]) => ({KeyPropertyName, ValuePropertyName})) console.log(result) 

Answer 2

如果要避免使用--downlevelIteration編譯器選項，請使用Array.from()而不是spread運算符。

我已經編輯了User863的代碼：

 let myMap = new Map() let value1 = ["0","1"]; let value2 = ["2","3"]; myMap.set("key1",value1); myMap.set("key2",value2); let result = Array.from(myMap).map(([KeyPropertyName, ValuePropertyName]) => ({KeyPropertyName, ValuePropertyName})) console.log(result)