Get values from objects in array with rest parameter-CodePudding

let newValues = user.info.socialMedia ? [...user.info.socialMedia] : []

So here we get several objects into the array that have an id key, and instead of the objects themselves I want to have only the id strings in this array. How can I get this working? I am quite new to Javascript, so it would be nice to get some help here.

I tried a for of then a for in loop to get the ids out of there and push them to the array, tho this does not work for my case.

CodePudding user response：

instead of the objects themselves I want to have only the id strings

That sounds like a .map() operation, to project one array into another by applying a transformation to each object. Something like this:

let newValues = user.info.socialMedia ? user.info.socialMedia.map(s => s.id) : []

Or perhaps simpler:

let newValues = user.info.socialMedia?.map(s => s.id) ?? []

For example:

let user = {
  info: {
    socialMedia: [
      { id: 1, name: 'Ron' },
      { id: 2, name: 'Tammy' },
      { id: 3, name: 'Tammy 2' }
    ]
  }
};
let newValues = user.info.socialMedia?.map(s => s.id) ?? []
console.log(newValues);