Looping through array of object based on a key and change its value in javascript

Question

Loop through a object array find a key and then change its value in javascript

Hi I have a below array of objects

[
  {
    createdDateTime: {
      '$gte': '2023-02-08T00:00:00.000Z',
      '$lte': '2023-05-09T23:59:59.000Z'
    }
  },
  { user: 'customer' }
]

I want to change it to below

[
  {
    createdDateTime: {
      '$gte':new Date( '2023-02-08T00:00:00.000Z'),
      '$lte':new Date( '2023-05-09T23:59:59.000Z')
    }
  },
  { user: 'customer' }
]

What I tried

var check = filtersFromRequest.some(obj => obj.hasOwnProperty("createdDateTime"));
  if(check){
   // stuck here as what to do , 
  }

Kindly guide

Answer 1

You can loop through the array, and then for each object, check if it has the createdDateTime property. If it does, update the $gte and $lte values with new Date objects.

Here's how you can do it:

// Assuming payloads is your initial array
const updatedPayloads = payloads.map(obj => {
  if(obj.hasOwnProperty('createdDateTime')) {
    let newObject = {...obj}; // clone the object to avoid modifying original
    if(newObject.createdDateTime.hasOwnProperty('$gte')) {
      newObject.createdDateTime['$gte'] = new Date(newObject.createdDateTime['$gte']);
    }
    if(newObject.createdDateTime.hasOwnProperty('$lte')) {
      newObject.createdDateTime['$lte'] = new Date(newObject.createdDateTime['$lte']);
    }
    return newObject;
  } else {
    return obj; // return object as it is if it does not contain 'createdDateTime'
  }
});

This code will create a new array called updatedPayloads with the date strings replaced by Date objects. The original payloads array will remain unchanged.