JavaScript-如何訪問物件的第二個物件-有解無憂

我需要訪問的API的最后一個月的資料，但我不知道我怎么能訪問的第二個物件，沒有硬編碼像這樣的日期： const data = [data.data['Monthly Time Series']['2021-11-30']]。在這個例子中，目前我需要來自“每月時間序列”的 11 月資料，但我需要它是動態的而不是寫出日期，所以它總是會顯示過去一個月的實際資料。我將不勝感激任何幫助。

這是 JSON 的樣子：

{
  "Meta Data": {
    "1. Information": "Monthly Prices (open, high, low, close) and Volumes",
    "2. Symbol": "IBM",
    "3. Last Refreshed": "2021-12-08",
    "4. Time Zone": "US/Eastern"
  },
  "Monthly Time Series": {
    "2021-12-08": {
      "1. open": "118.2500",
      "2. high": "123.3800",
      "3. low": "116.5600",
      "4. close": "123.0200",
      "5. volume": "33320654"
    },
    "2021-11-30": {
      "1. open": "125.0500",
      "2. high": "127.2900",
      "3. low": "114.5600",
      "4. close": "117.1000",
      "5. volume": "119252012"
    },

uj5u.com熱心網友回復：

這可能看起來有點復雜，但它絕對會為您提供每月條目的最后日期

let data = {
  "Meta Data": {
    "1. Information": "Monthly Prices (open, high, low, close) and Volumes",
    "2. Symbol": "IBM",
    "3. Last Refreshed": "2021-12-08",
    "4. Time Zone": "US/Eastern"
  },
  "Monthly Time Series": {
    "2021-12-08": {
      "1. open": "118.2500",
      "2. high": "123.3800",
      "3. low": "116.5600",
      "4. close": "123.0200",
      "5. volume": "33320654"
    },
    "2021-11-30": {
      "1. open": "125.0500",
      "2. high": "127.2900",
      "3. low": "114.5600",
      "4. close": "117.1000",
      "5. volume": "119252012"
    }
  }
}

console.log(
  data["Monthly Time Series"]
  [Object.keys(data["Monthly Time Series"])
  [Object.keys(data["Monthly Time Series"]).length - 1]]) // This gets you the last entry

uj5u.com熱心網友回復：

您可以使用Object.values()來獲取每月時間序列值的陣列。

一旦我們有了monthlyTimeSeries，我們就可以使用標準陣串列示法 ([1]) 獲得第二項：

let obj = { "Meta Data": { "1. Information": "Monthly Prices (open, high, low, close) and Volumes", "2. Symbol": "IBM", "3. Last Refreshed": "2021-12-08", "4. Time Zone": "US/Eastern" }, "Monthly Time Series": { "2021-12-08": { "1. open": "118.2500", "2. high": "123.3800", "3. low": "116.5600", "4. close": "123.0200", "5. volume": "33320654" }, "2021-11-30": { "1. open": "125.0500", "2. high": "127.2900", "3. low": "114.5600", "4. close": "117.1000", "5. volume": "119252012" } } } 

const monthlyTimeSeries = Object.values(obj["Monthly Time Series"]);
const result = monthlyTimeSeries[1];
console.log('Result:', result)

.as-console-wrapper { max-height: 100% !important; top: 0; }

uj5u.com熱心網友回復：

嘗試

var result = Object.entries(data['Monthly Time Series'])
console.log(result);

將給出以下結果

[
  [
    '2021-12-08',
    {
      '1. open': '118.2500',
      '2. high': '123.3800',
      '3. low': '116.5600',
      '4. close': '123.0200',
      '5. volume': '33320654'
    }
  ],
  [
    '2021-11-30',
    {
      '1. open': '125.0500',
      '2. high': '127.2900',
      '3. low': '114.5600',
      '4. close': '117.1000',
      '5. volume': '119252012'
    }
  ]
]

您可以通過此串列進行映射以獲取所需日期的資料

轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/384552.html

標籤：javascript 接口目的

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