Tips for comparing and adding a field to a sub-array within an object

Question

Tips for comparing and adding a field to a sub-array within an object

I have a scenario where I have two objects. The first object contains name and id, while the second object has some fields along with the id field from the first object.

For Example:

FirstObj = [{
  _id: '48765465f42424',
  Name : 'Sample'
},{
  _id: '48765465f654654',
  Name : 'Sample1'
}]
secondObj = [{
  Field1 : 5464,
  subarray : [{
        Field2 : 14654,
        Field3 : { IsActive : true,
                     FirstObjid : '48765465f42424'
                  },
        Field4 : { IsActive : true,
                     FirstObjid : '48765465f654654'
                  }
            }]
    },
    {
  Field1 : 2145,
  subarray : [{
        Field2 : 544644,
        Field3 : { IsActive : true,
                     FirstObjid : '48765465f654654'
                  },
        Field4 : { IsActive : true,
                     FirstObjid : '48765465f42424'
                  },
        }]
    }]

In this case, I need to compare both objects and add the corresponding name from the first object to the secondobj's subobj alongside the FirstObjid field.

The Expected Output should be:

 secondObj = [{
  Field1 : 5464,
  subarray : [{
        Field2 : 14654,
        Field3 : { IsActive : true,
                     FirstObjid : '48765465f42424',
                    Name : 'Sample'
                  },
        Field4 : { IsActive : true,
                     FirstObjid : '48765465f654654',
                    Name : 'Sample1'
                  }
            }]
    },
    {
  Field1 : 2145,
  subarray : [{
        Field2 : 544644,
        Field3 : { IsActive : true,
                     FirstObjid : '48765465f654654',
                     Name : 'Sample1'
                  },
        Field4 : { IsActive : true,
                     FirstObjid : '48765465f42424',
                    Name : 'Sample'
                  },
        }]
    }]

If you are thinking how to achieve this, keep reading!

javascript angularjs

Answer 1

Answer №1

Give this a shot

secondObj.subarray.forEach(function(element){
if(element.FirstObjid==FirstObj._id)
    element.Name = FirstObj.Name
})

Answer 2

Give this a shot

secondObj.subarray.forEach(function(element){
if(element.FirstObjid==FirstObj._id)
    element.Name = FirstObj.Name
})

Answer 3

Answer №2

Utilize the map function to compare object ids in this way

var secondObj =  [{
  Field1 : 5464,
  subarray : [{
        Field2 : 14654,
        Field3 : 'sfsadf',
        FirstObjid : '48765465f42424'
        }]
    },
    {
  Field1 : 2145,
  subarray : [{
        Field2 : 544644,
        Field3 : 'awrfsa',
        FirstObjid : '48765465f654654'
        }]
    }]
    
 var FirstObj = [{
  _id: '48765465f42424',
  Name : 'Sample'
},{
  _id: '48765465f654654',
  Name : 'Sample1'
}]

secondObj.subarray = secondObj.map(o => o.subarray.map(k=> FirstObj.map(l=> { 
  if(l._id == k.FirstObjid){
     k.Name = l.Name
  }
  return o;
})))
 

console.log(secondObj)

Answer 4

Utilize the map function to compare object ids in this way

var secondObj =  [{
  Field1 : 5464,
  subarray : [{
        Field2 : 14654,
        Field3 : 'sfsadf',
        FirstObjid : '48765465f42424'
        }]
    },
    {
  Field1 : 2145,
  subarray : [{
        Field2 : 544644,
        Field3 : 'awrfsa',
        FirstObjid : '48765465f654654'
        }]
    }]
    
 var FirstObj = [{
  _id: '48765465f42424',
  Name : 'Sample'
},{
  _id: '48765465f654654',
  Name : 'Sample1'
}]

secondObj.subarray = secondObj.map(o => o.subarray.map(k=> FirstObj.map(l=> { 
  if(l._id == k.FirstObjid){
     k.Name = l.Name
  }
  return o;
})))
 

console.log(secondObj)

Tips for comparing and adding a field to a sub-array within an object

Answer №1

Answer №2

Similar questions

What is the best way to set up multiple unique uglify tasks in grunt?

Learn the process of playing a video in an HTML5 video player after it has finished downloading

The error message "ReferenceError: $ is not defined" is displayed within

Tips for displaying the data on top of individual column bars: Hightcharts, Vue-chartkick, and Cube Js

I was disappointed by the lackluster performance of the DataTable in CodeIgniter; it did not

Performing a synchronous loop with Javascript promises

Is there a way to combine multiple incoming WebRTC audio streams into one cohesive stream on a server?

What could be causing the Or operator to malfunction within the ng-pattern attribute in AngularJS?

Is it possible for JavaScript to access and read a local file from a web page hosted locally

Changing the state using setState outside of the component does not trigger an update

Tips for showcasing JSON data within an array of objects

Certain public files in Express cannot be accessed locally

ExpressJS, defining routes, locating controllers, and documenting APIs

What is the best way to send JSON data to a code behind method instead of a Webmethod?

Issue with BlobUrl not functioning properly when included as the source in an audio tag

Guide on making a persistent sidebar using CSS and JavaScript

Is there a way to alter visibility once a radio button has been selected?

Use Entity Objects instead of Strings in your Ajax requests for improved data handling

Filtering Sails.js query model based on a collection attribute

Items in a pair of distinct columns