Hey Sai, I look into your solution for problem-solving. I have a doubt

on 1st Ques you use Object.hasOwnProperty.call(result,key) for condition

if(Object.hasOwnProperty.call(result, key)){
                    result[key] = result[key] + obj[key]
                  }else{
                  result[key] = obj[key]
                } 
    }

but result.hasOwnProperty also work

if(result.hasOwnProperty(key)){
                    result[key] = result[key] + obj[key]
                  }else{
                  result[key] = obj[key]
                } 
    }

Is there any difference in using one then another