將長日期物件分組為月份物件-有解無憂

我有一個很長的日期物件，它將日期與價格/數??字配對。例如：

let obj = {
"2022-09-17": 45,
"2022-09-18": 35,
"2022-09-19": 34,
"2022-09-20": 26,
"2022-09-21": 25,
"2022-09-22": 33,
"2022-09-23": 56,
"2022-09-24": 39,
"2022-09-25": 49,
"2022-09-26": 25,
"2022-09-27": 25,
"2022-09-28": 25,
"2022-09-29": 33,
"2022-09-30": 42,
"2022-10-01": 28,
"2022-10-02": 38,
"2022-10-03": 35,
"2022-10-04": 25,
"2022-10-05": 25,
"2022-10-06": 31
}

將此物件重新組合為與日期相關并包含鍵/值的月份陣列的最佳方法是什么？

例如 - 像這個截圖：

將長日期物件分組為月份物件

我想按月份對鍵/值對進行分組，以便稍后回圈遍歷所有月份，以找到每個月的最低價格。

但首先，我想在幾個月內找出分解這個物體的最佳方法？

謝謝，

uj5u.com熱心網友回復：

通常，reduce是一個很好的解決方案

let object = {
  "2022-09-17": 45,
  "2022-09-18": 35,
  "2022-09-19": 34,
  "2022-09-20": 26,
  "2022-09-21": 25,
  "2022-09-22": 33,
  "2022-09-23": 56,
  "2022-09-24": 39,
  "2022-09-25": 49,
  "2022-09-26": 25,
  "2022-09-27": 25,
  "2022-09-28": 25,
  "2022-09-29": 33,
  "2022-09-30": 42,
  "2022-10-01": 28,
  "2022-10-02": 38,
  "2022-10-03": 35,
  "2022-10-04": 25,
  "2022-10-05": 25,
  "2022-10-06": 31
}

const objectMonth = Object
  .keys(object)
  .reduce((acc, key) => {
    const date = new Date(key)
    const month = date.toLocaleString('default', { month: 'long' })
    acc[month] = acc[month] || []
    acc[month].push({
      date: key,
      price: object[key]
    })
    return acc
  }, {})

console.log(objectMonth)

uj5u.com熱心網友回復：

你可以做這樣的事情。

邏輯

回圈遍歷物件中的條目
將日期拆分為年、月和日。
用一些邏輯獲取月份名稱。
減少物件中的這個條目陣列。

let obj = {
  "2022-09-17": 45,
  "2022-09-18": 35,
  "2022-09-19": 34,
  "2022-09-20": 26,
  "2022-09-21": 25,
  "2022-09-22": 33,
  "2022-09-23": 56,
  "2022-09-24": 39,
  "2022-09-25": 49,
  "2022-09-26": 25,
  "2022-09-27": 25,
  "2022-09-28": 25,
  "2022-09-29": 33,
  "2022-09-30": 42,
  "2022-10-01": 28,
  "2022-10-02": 38,
  "2022-10-03": 35,
  "2022-10-04": 25,
  "2022-10-05": 25,
  "2022-10-06": 31,
};
const months = [
  "january",
  "february",
  "march",
  "april",
  "may",
  "june",
  "july",
  "august",
  "september",
  "october",
  "november",
  "december",
];
const splittedData = Object.entries(obj).reduce(
  (acc, [dateStr, value]) => {
    const [year, month, date] = dateStr.split("-");
    if (!acc[months[ month - 1]]) {
      acc[months[ month - 1]] = [];
    }
    acc[months[ month - 1]].push({ [dateStr]: value });
    return acc;
  },
  {}
);
console.log(splittedData);

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標籤：javascript 数组排序 for循环目的

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