Javascript 重新格式化或 map 將對象數組轉換為新對象數組？ 就像重新格式化它並為值提供新的鍵（名稱）

Question

我是 Arrays 和對象的新手，所以我整天都忙於完成這項任務

 [ { "date": "1959:01", "1": 138.89, "2": 139.39, "3": 139.74, "4": 139.69, "5": 140.68, "6": 141.17 }, { "date": "1959:07", "1": 141.7, "2": 141.9, "3": 141.01, "4": 140.47, "5": 140.38, "6": 139.95 }, { "date": "1960:01", "1": 139.98, "2": 139.87, "3": 139.75, "4": 139.56, "5": 139.61, "6": 139.58 }, { "date": "1960:07", "1": 140.18, "2": 141.31, "3": 141.18, "4": 140.92, "5": 140.86, "6": 140.69 }, { "date": "1961:01", "1": 141.06, "2": 141.6, "3": 141.87, "4": 142.13, "5": 142.66, "6": 142.88 }, { "date": "1961:07", "1": 142.92, "2": 143.49, "3": 143.78, "4": 144.14, "5": 144.76, "6": 145.2 }, { "date": "1962:01", "1": 145.24, "2": 145.66, "3": 145.96, "4": 146.4, "5": 146.84, "6": 146.58 }, { "date": "1962:07", "1": 146.46, "2": 146.57, "3": 146.3, "4": 146.71, "5": 147.29, "6": 147.82 }, { "date": "1963:01", "1": 148.26, "2": 148.9, "3": 149.17, "4": 149.7, "5": 150.39, "6": 150.43 }, { "date": "1963:07", "1": 151.34, "2": 151.78, "3": 151.98, "4": 152.55, "5": 153.65, "6": 153.29 }, { "date": "1964:01", "1": 153.74, "2": 154.31, "3": 154.48, "4": 154.77, "5": 155.33, "6": 155.62 }, { "date": "1964:07", "1": 156.8, "2": 157.82, "3": 158.75, "4": 159.24, "5": 159.96, "6": 160.3 }, { "date": "1965:01", "1": 160.71, "2": 160.94, "3": 161.47, "4": 162.03, "5": 161.7, "6": 162.19 }, { "date": "1965:07", "1": 163.05, "2": 163.68, "3": 164.85, "4": 165.97, "5": 166.71, "6": 167.85 }, { "date": "1966:01", "1": 169.08, "2": 169.62, "3": 170.51, "4": 171.81, "5": 171.33, "6": 171.57 }, { "date": "1966:07", "1": 170.31, "2": 170.81, "3": 171.97, "4": 171.16, "5": 171.38, "6": 172.03 } ]

這些就像公司在特定年份的收入，例如在 1959:01 開始時，從 1 到 6 是一年的前 6 個月，同年 1956:07 但“：07”中的差異是值同年最后 6 個月（1 到 6 個月），所以我想用最容易理解的代碼制作 output，如下所示。

 "1956": { "1": "value", "2": "value", "3": "value", "4": "value", "5": "value", "6": "value", "7": "value", "8": "value", "9": "value", "10": "value", "11": "value", "12": "value" }, "1957": { "1": "value", "2": "value", "3": "value", "4": "value", "5": "value", "6": "value", "7": "value", "8": "value", "9": "value", "10": "value", "11": "value", "12": "value" }, "1958": { "1": "value", "2": "value", "3": "value", "4": "value", "5": "value", "6": "value", "7": "value", "8": "value", "9": "value", "10": "value", "11": "value", "12": "value" }

非常感謝幫助。

Answer 1

這是你的答案：

const data=[
  { "date": "1959:01", "1": 138.89, "2": 139.39, "3": 139.74, "4": 139.69, "5": 140.68, "6": 141.17 },
  { "date": "1959:07", "1": 141.7, "2": 141.9, "3": 141.01, "4": 140.47, "5": 140.38, "6": 139.95 },
  { "date": "1960:01", "1": 139.98, "2": 139.87, "3": 139.75, "4": 139.56, "5": 139.61, "6": 139.58 },
  { "date": "1960:07", "1": 140.18, "2": 141.31, "3": 141.18, "4": 140.92, "5": 140.86, "6": 140.69 },
  { "date": "1961:01", "1": 141.06, "2": 141.6, "3": 141.87, "4": 142.13, "5": 142.66, "6": 142.88 },
  { "date": "1961:07", "1": 142.92, "2": 143.49, "3": 143.78, "4": 144.14, "5": 144.76, "6": 145.2 },
  { "date": "1962:01", "1": 145.24, "2": 145.66, "3": 145.96, "4": 146.4, "5": 146.84, "6": 146.58 },
  { "date": "1962:07", "1": 146.46, "2": 146.57, "3": 146.3, "4": 146.71, "5": 147.29, "6": 147.82 },
  { "date": "1963:01", "1": 148.26, "2": 148.9, "3": 149.17, "4": 149.7, "5": 150.39, "6": 150.43 },
  { "date": "1963:07", "1": 151.34, "2": 151.78, "3": 151.98, "4": 152.55, "5": 153.65, "6": 153.29 },
  { "date": "1964:01", "1": 153.74, "2": 154.31, "3": 154.48, "4": 154.77, "5": 155.33, "6": 155.62 },
  { "date": "1964:07", "1": 156.8, "2": 157.82, "3": 158.75, "4": 159.24, "5": 159.96, "6": 160.3 },
  { "date": "1965:01", "1": 160.71, "2": 160.94, "3": 161.47, "4": 162.03, "5": 161.7, "6": 162.19 },
  { "date": "1965:07", "1": 163.05, "2": 163.68, "3": 164.85, "4": 165.97, "5": 166.71, "6": 167.85 },
  { "date": "1966:01", "1": 169.08, "2": 169.62, "3": 170.51, "4": 171.81, "5": 171.33, "6": 171.57 },
  { "date": "1966:07", "1": 170.31, "2": 170.81, "3": 171.97, "4": 171.16, "5": 171.38, "6": 172.03 }
]

const formated={};

for(let obj of data){
  const formatDate=obj['date'].split(":")[0];
  formated[formatDate]={...obj};
  delete formated[formatDate]['date']
}

console.log(formated)

這里formated的變量是一個 object，如下所示：

'1959': {
    '1': 141.7,
    '2': 141.9,
    '3': 141.01,
    '4': 140.47,
    '5': 140.38,
    '6': 139.95
  },
  '1960': {
    '1': 140.18,
    '2': 141.31,
    '3': 141.18,
    '4': 140.92,
    '5': 140.86,
    '6': 140.69
  },
  '1961': {
    '1': 142.92,
    '2': 143.49,
    '3': 143.78,
    '4': 144.14,
    '5': 144.76,
    '6': 145.2
  },
  '1962': {
    '1': 146.46,
    '2': 146.57,
    '3': 146.3,
    '4': 146.71,
    '5': 147.29,
    '6': 147.82
  },
  '1963': {
    '1': 151.34,
    '2': 151.78,
    '3': 151.98,
    '4': 152.55,
    '5': 153.65,
    '6': 153.29
  },
  '1964': {
    '1': 156.8,
    '2': 157.82,
    '3': 158.75,
    '4': 159.24,
    '5': 159.96,
    '6': 160.3
  },
  '1965': {
    '1': 163.05,
    '2': 163.68,
    '3': 164.85,
    '4': 165.97,
    '5': 166.71,
    '6': 167.85
  },
  '1966': {
    '1': 170.31,
    '2': 170.81,
    '3': 171.97,
    '4': 171.16,
    '5': 171.38,
    '6': 172.03
  }
}