javascriptarraysecmascript-6javascript-objectsobject-comparison

How to compare two objects with nested array of object using loop

I have two objects, suppose

A = {
    name:'abc',
    age: 20,
    areaOfInterest:[
       { inSports:'badminton', outSports:'football' },
       { inSports:'chess', outSports:'tennis' }]
    }

B = {
    age: 20,
    name: 'abc',
    areaOfInterest:[
       { inSports:'chess', outSports:'tennis' },
       { inSports:'badminton', outSports:'football' }]
    }

As in given example above, the sequence of keys is different in both objects. Also, while comparing I dont want to go with

if(A.name == B.name)
if(A.areOfInterest.inSports == B.areOfInterest.inSports)

I want to compare them using loop like for...In or for...Of

Here is what I tried,

A = {
  name:'abc',
  age: 20,
  areaOfInterest:[
   { inSports:'badminton', outSports:'football' },
   { inSports:'chess', outSports:'tennis' }
  ]
}
    
B = {
  age:20,
  name: 'abc',
  areaOfInterest:[
   { inSports:'chess', outSports:'tennis' },
   { inSports:'badminton', outSports:'football' }
  ]
}
        
function objCompare(obj1, obj2){
  for (var [key, value] of Object.entries(obj1)) {
    for (var [k, v] of Object.entries(obj2)){
      if(k == key && v == value)
       console.log(true)
    }
  }
}

console.log(objCompare(A,B));

I am not getting true result. It gives undefined when it compares A.areOfInterest with B.areOfInterest

Solution

  • I'd do something like this:

    A = {
  name:'abc',
  age: 20,
  areaOfInterest:[
   { inSports:'badminton', outSports:'football' },
   { inSports:'chess', outSports:'tennis' }
  ]
}
    
B = {
  age:'abc',
  name: 20,
  areaOfInterest:[
   { inSports:'chess', outSports:'tennis' },
   { inSports:'badminton', outSports:'football' }
  ]
}

C = {
  age:'abc',
  name: 20,
  areaOfInterest:[
   { inSports:'chess', outSports:'tennis' },
   { inSports:'badminton', outSports:'football' }
  ]
}
        
function objCompare(obj1, obj2){
  var same = true;
  for (var [key, value] of Object.entries(obj1)) {
    if(typeof value === 'object') {
      same = objCompare(obj1[key], obj2[key]);
    } else {
      if(obj1[key] != obj2[key]) same = false;
    }
  }
  
  return same;
}

console.log(objCompare(A,B));
console.log(objCompare(B,C));

    So using the function recursively you can iterate over other objects inside the main objects.

    Hope that helps you :)