javascript - 将类似的 JSON 对象分组到数组中

Question

我有一个库返回的模型，格式如下:

var givenData = [{"fName": "john"}, {"fName": "mike"}, {"country": "USA"}]

如何将“fName”组合在一起并添加“[]”以获得:

{ 'fName[]': ['john','mike'],'country[]': ['USA'] };

**注意 country 和 fName 完全不相关。

Answer 1

建议(使用ES6语法)

const transformData = (data) => {
  const newData = {}
  data.forEach( (item) => {
    for (let key in item) {
       const newKey = key + "[]"
       if (!newData.hasOwnProperty(newKey)) newData[newKey] = []
       newData[newKey].push(item[key])
    }
  })
  return newData
}

/* added some extra keys just to test */
let givenData = [
  {"fName": "john", "country": "England"}, 
  {"fName": "mike"}, 
  {"country": "USA"},
  {"language": "English"}
]

console.log(transformData(givenData))
/*
{
    "fName[]": ["john","mike"],
    "country[]": ["England","USA"],
    "language[]":["English"]
}
*/