如何從對象數組中創建一串鍵值對 object？

Question

我有一個來自后端的對象列表，如下所示

  const paramData = [
    {id: "search_type", value: "All items", required: true},
    {id: "time_period", value: "Week", required: false},
    {id: "user_type", value: "All Users", required: false},
    {id: "question_type", value: "Multiple questions", required: true},
  ];

我想只提取每個 object 的id和value鍵的值，並制作如下所示的內容

  const extractedData = "{\"search_type\": \"All items\", \"time_period\": \"Week\", \"user_type\": \"All Users\", \"question_type\": \"Multiple questions\"}";

實現這一目標的最佳方法是什么？

Answer 1

你可以使用減少；

  const extractedData = paramData.reduce((obj, item) => {
     obj[item.id] = item.value
     return obj
   }, {})

請在此處查看詳細說明我也強烈推薦map和filter 。 使用reduce ，它們是數組的 3 顆星

Answer 2

ilkerkaran的替代解決方案可能是：

 const paramData = [{ id: "search_type", value: "All items", required: true }, { id: "time_period", value: "Week", required: false }, { id: "user_type", value: "All Users", required: false }, { id: "question_type", value: "Multiple questions", required: true },]; var extractedData = ""; for (var i in paramData) { extractedData += `"${paramData[i].id}": "${paramData[i].value}", `; } extractedData = `{${extractedData.slice(0, -2)}}`; console.log(extractedData);