Add param to all objects in an Array - Javascript

Question

I have an Array of Objects like:

[
   {
      title: 'Title 1',
      value: 'value 1'
   },
   {
      title: 'Title 2',
      value: 'value 2'
   }
]

I need to add a new param to all the objects.

I know I can do a for over the array and modify each object, I'm trying to find a way to solve with a native method. Does that exists?

There are any number of ways to hide the fact that you're looping (`forEach`, `map` etc), but in the end what you need is a simple loop. — deceze, Nov 17 '16 at 15:47

score 3 · Answer 1 · answered Nov 17 '16 at 15:48

3

var arrayObj=[
   {
      title: 'Title 1',
      value: 'value 1'
   },
   {
      title: 'Title 2',
      value: 'value 2'
   }
];

arrayObj.forEach(function(obj){
  obj.newProp='new';
  });
console.log(arrayObj);

answered Nov 17 '16 at 15:48

Mr.Bruno

4,519
2
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score 2 · Answer 2 · answered Nov 17 '16 at 15:48

2

You can do like this

a.forEach(function(item,index){
item.newParam=index

});

DEMO

answered Nov 17 '16 at 15:48

brk

46,805
5
49
71

score 2 · Answer 3 · answered Nov 17 '16 at 15:59

2

YourList.forEach(function(entry) { entry['newElement'] = "test"; console.log(entry); });

answered Nov 17 '16 at 15:59

Pruna Catalin

65
3

score -3 · Answer 4 · answered Nov 17 '16 at 15:48

-3

var newData = data.map(function(o){
  o.newElem = 10;//whatever you want
  return o;
});

answered Nov 17 '16 at 15:48

user2693928

3,507
2
14
25

1

Unnecessarily wasteful. Why create a new array? – deceze Nov 17 '16 at 15:48

Add param to all objects in an Array - Javascript

4 Answers4