What is the best way to collapse an array within an object?

Question

What is the best way to collapse an array within an object?

I'm looking for a way to flatten an array within an object using JavaScript, preferably ES6. I'm not sure if "flattening" is the correct term here, but I just want a solution to achieve this transformation.

Currently, I have this structure:

{
  id: "123",
  name: "test",
  history: [
    {
      id: "456",
      name: "test2"
    },
    {
      id: "789",
      name: "test3"
    }
  ]
}

And I want to convert it to:

{
  id: "123",
  name: "test"
},
{
  id: "456",
  name: "test2"
},
{
  id: "789",
  name: "test3"
}

The original object includes a "history" property specific to that object. Any suggestions on how to approach this?

javascript arrays json object flatten

Answer 1

Answer №1

To efficiently separate history and the first object, you can utilize destructuring along with rest syntax. Afterwards, merge them into a single array using spread or concat methods.

const { history, ...obj1 } = {"id":"123","name":"test","history":[{"id":"456","name":"test2"},{"id":"789","name":"test3"}]}

const result = [obj1, ...history]

console.log(result)

Answer 2

To efficiently separate history and the first object, you can utilize destructuring along with rest syntax. Afterwards, merge them into a single array using spread or concat methods.

const { history, ...obj1 } = {"id":"123","name":"test","history":[{"id":"456","name":"test2"},{"id":"789","name":"test3"}]}

const result = [obj1, ...history]

console.log(result)

Answer 3

Answer №2

give this a shot:

 let dataObj =  {
  "id": "123",
  "name": "example",
  "log": [
    {
      "id": "456",
      "name": "example2"
    },
    {
      "id": "789",
      "name": "example3"
    }
  ]
}

const  {id, name, log} =  dataObj;
const finalArr  = [{id, name} , ...log];

console.log(finalArr);

Answer 4

give this a shot:

 let dataObj =  {
  "id": "123",
  "name": "example",
  "log": [
    {
      "id": "456",
      "name": "example2"
    },
    {
      "id": "789",
      "name": "example3"
    }
  ]
}

const  {id, name, log} =  dataObj;
const finalArr  = [{id, name} , ...log];

console.log(finalArr);

What is the best way to collapse an array within an object?

Answer №1

Answer №2

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