是否有任何选项可以从对象数组中单独获取键值并将其作为 object 的单独数组在单引号内

Question

var Header =[
{
  "COL_1": "Name",
  "COL_2": "Subject",
  "COL_3": "likes",
  "COL_4": "city",
  
},
{
  "COL_1": "mohan",
  "COL_2": "maths",
  "COL_3": "3",
  "COL_4": "chennai",
  
}

  ];

expected output:

    var output=[
  {
  "COL_1":'Name,Subject,Likes,city'
  },
  {
  "COL_1":'mohan,maths,3,chennai'
  }
  ];

Answer 1

Use map and Object.values

 var Header = [ { COL_1: "Name", COL_2: "Subject", COL_3: "likes", COL_4: "city", }, { COL_1: "mohan", COL_2: "maths", COL_3: "3", COL_4: "chennai", }, ]; const res = Header.map((obj) => { const [key] = Object.keys(obj); return { [key]: Object.values(obj).join(), }; }); console.log(res)

Answer 2

Can try out this:

 var Header =[ { "COL_1": "Name", "COL_2": "Subject", "COL_3": "likes", "COL_4": "city", }, { "COL_1": "mohan", "COL_2": "maths", "COL_3": "3", "COL_4": "chennai", } ]; let output = []; Header.forEach(elem => { let str = ''; Object.keys(elem).forEach(key => str += elem[key] + ','); output.push({COL_1: str}); }); console.log('output:', output);

Answer 3

Apply the map() method on the original array. Then use the Object.keys() method to get the key for each object, and the Object.values() method to get the values from the object. I would also recommend that you use const or let instead of var for variable declaration.

 const Header = [ { "COL_1": "Name", "COL_2": "Subject", "COL_3": "likes", "COL_4": "city", }, { "COL_1": "mohan", "COL_2": "maths", "COL_3": "3", "COL_4": "chennai", } ]; const output = Header.map((el) => { const key = Object.keys(el)[0]; return { [key]: `${Object.values(el)}` } }); console.log(output);