使用特定的键将const Array转换为JSON

Question

我有一个这样的数组：

const faces= [
    [[128516], "grinning face with smiling eyes", "20201001"],
    [[128512], "grinning face", "20201001"],
    [[128578], "slightly smiling face", "20201001"],
    [[128579], "upside-down face", "20201001"],
    [[128521], "winking face", "20201001"]
]

我想使用Java或JavaScript将其转换为格式化的JSON，但两者都可以：

[
  {
    "id": 128516,
    "name": "grinning face with smiling eyes",
    "date": "20201001"
  },
  {
    "id": 128512,
    "name": "grinning face",
    "date": "20201001"
  }
]

任何帮助都很感激。

Answer 1

使用数组的“映射”功能的简单一行代码。

const faces= [
    [[128516], "grinning face with smiling eyes", "20201001"],
    [[128512], "grinning face", "20201001"],
    [[128578], "slightly smiling face", "20201001"],
    [[128579], "upside-down face", "20201001"],
    [[128521], "winking face", "20201001"]
];

let newObj = []; 

faces.map(eachObj => {
  const obj = {
   id: eachObj[0][0],
   name: eachObj[1],
   date: eachObj[2]
  };
  newObj.push(obj);
});

console.log('New Obj ==>', newObj);

Answer 2

您可以使用reduce：

const faces = [
  [
    [128516], "grinning face with smiling eyes", "20201001"
  ],
  [
    [128512], "grinning face", "20201001"
  ],
  [
    [128578], "slightly smiling face", "20201001"
  ],
  [
    [128579], "upside-down face", "20201001"
  ],
  [
    [128521], "winking face", "20201001"
  ]
]

const result = faces.reduce((result, value) => {
  result.push({
    id: value[0][0],
    name: value[1],
    date: value[2]
  })
  return result
}, [])

console.log(result)

Answer 3

js lang-js prettyprint-override">const faces = [
  [
    [128516], "grinning face with smiling eyes", "20201001"
  ],
  [
    [128512], "grinning face", "20201001"
  ],
  [
    [128578], "slightly smiling face", "20201001"
  ],
  [
    [128579], "upside-down face", "20201001"
  ],
  [
    [128521], "winking face", "20201001"
  ]
]

let result = []
faces.forEach(item => {
  let a = {
    id: item[0][0],
    name: item[1],
    date: item[2]
  }
  result.push(a)
})

console.log(JSON.stringify(result))