将数组复制到另一个对象属性javascript

Question

I have two objects:

Group which has a users property, containing an array of ObjectIds:

["59f5c8b62f73d036bc4f5673","59f5c7d42f73d036bc4f566b",
"59f5c81a2f73d036bc4f566d","59f5c8482f73d036bc4f566f"]

And another object which has a property which needs to be populated with that exact array of objectIds, so when I create it in the back, it looks like this right now:

var object = new Object({
      title: req.body.title
      group: req.params.id,
      objectArray: { user: group.users, value: 1 }
    });

I am expecting to get the population as follows:

object: {
    title: some-title,
    group: someRefId,
    objectArray: [ 
       {user: ObjectId1, value: 1},
       {user: ObjectId2, value: 1},
       {user: ObjectId3, value: 1},
       {user: ObjectId4, value: 1}
    ]
}

I need to iterate through that array somehow and then declare {user: user of group.users, value:1} or something. I don't understand how to iterate through that array while declaring a new object...

Answer 1

 var req = { body: { title: 'some-title' }, params: { id: 'someRefId' } }; var group = { users: [ "59f5c8b62f73d036bc4f5673", "59f5c7d42f73d036bc4f566b", "59f5c81a2f73d036bc4f566d", "59f5c8482f73d036bc4f566f" ] }; var object = { title: req.body.title, group: req.params.id, objectArray: group.users.map(function(user) { return { user: user, value: 1 }; }) }; console.log(object); 

Answer 2

You could use Array.prototype.map to do this.

ES6

...
objectArray: group.users.map((user) => ({ user, value: 1 }))
...

ES5

...
objectArray: group.users.map(function (user) {
    return { 
        user: user, 
        value: 1 
    };
})
...