How to slice the first object in the Array JS

userevLR 0
Viewed 52

I have an array containing objects :

userFromDb [
  {
    _id: new ObjectId("62d54652982bed4574869188"),
    userName: 'adi',
    password: '1234'
  },
  {
    _id: new ObjectId("62d54747982bed457486919f"),
    userName: 'an',
    password: '12345'
  }
]

I need to edit the _id in JS. This is the desired output:

userFromDb [
  {
    _id:'62d54652982bed4574869188',
    userName: 'adi',
    password: '1234'
  },
  {
    _id:'62d54747982bed457486919f',
    userName: 'an',
    password: '12345'
  }
]

I tried :

let userFromDb2 = userFromDb.map(x => x._id.slice(12))

And I got an error

TypeError: x._id.slice is not a function

Someone knows how to do it?

javascript
2 Answers

It really depends on structure of ObjectId class
for expample

class ObjectId {
    constructor(id) {
        this.id = id;
    }
}

in this class you can easily get id like this

let userFromDb2 = userFromDb.map(x => x._id.id)

and if you are using mongoDB this may help you this may help you

Afshar Sharifi0

You should specify the start and number of characters to cut in the string. so syntax let userFromDb2 = userFromDb.map(x => x._id.slice(0,12)) Hope this would help

KARTHICK RAVI0
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