Remove attribute from JSON objects in a array

Question

I have an array of json objects.

var user =[ { id: 1, name: 'linto', img: 'car' },
  { id: 2, name: 'shinto', img: 'ball' },
  { id: 3, name: 'hany', img: 'kite' } ]

From this is want to remove attribute img from all the elements of the array, so the output looks like this.

var user =[ { id: 1, name: 'linto' },
  { id: 2, name: 'shinto' },
  { id: 3, name: 'hany' } ]

Is there a way to do this in java script.

score 7 · Answer 1 · answered Oct 06 '18 at 04:26

You can use .map() with Object Destructuring:

let data =[
  { id: 1, name: 'linto', img: 'car' },
  { id: 2, name: 'shinto', img: 'ball' },
  { id: 3, name: 'hany', img: 'kite' }
];
  
let result = data.map(({img, ...rest}) => rest);

console.log(result);

score 4 · Accepted Answer · answered Oct 06 '18 at 04:27

4

Array.prototype.map()

The map() method creates a new array with the results of calling a provided function on every element in the calling array.

You can use map() in the following way:

var user =[ { id: 1, name: 'linto', img: 'car' },
  { id: 2, name: 'shinto', img: 'ball' },
  { id: 3, name: 'hany', img: 'kite' } ]
  
user = user.map(u => ({id: u.id, name: u.name}));
console.log(user);

answered Oct 06 '18 at 04:27

Mamun

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can we add some kind of condition while doing the mapping? Like if we want to check Id is null or not. – Souradeep Banerjee-AIS Jan 20 '21 at 10:37
1

@SouradeepBanerjee-AIS, `map()` is designed to iterate over all the array items and you can manipulate the items based on some condition. If you want to filter out some items then you can use `filter()`:) – Mamun Jan 20 '21 at 12:06
1

Thanks, I used the filter function and was able to do it. – Souradeep Banerjee-AIS Jan 21 '21 at 13:02
@SouradeepBanerjee-AIS, you are most welcome:) – Mamun Jan 21 '21 at 13:14

Remove attribute from JSON objects in a array

2 Answers2