CODEWITHSUNDEEP
javascriptecmascript-6
krsna
krsna

Reputation: 4333

How to filter the result of array of objects having different keys

How to get the difference of array of objects having different keys by comparing the value? 

const array1 = [{
  name: 'BMW',
  type: 'car'
}]

const array2 = [{
    year: '2020',
    carName: 'BMW',
    model: 'SUV',
    value: 'car'
  },
  {
    year: '2019',
    carName: 'Benz',
    model: 'Sedan',
    value: 'car'
  },
  {
    year: '2018',
    carName: 'Audi',
    model: 'Coupe',
    value: 'car'
  }
]

const result = array1.filter(
  ({
    car: id1
  }) =>
  !array2.some(({
    carName: id2
  }) => id2 === id1)
);

console.log('Result ', result)

Below is what I'm expecting. The resultant array should filter out the results that are not there in array1

[
  {
    year: '2019',
    carName: 'Benz',
    model: 'Sedan',
    value: 'car'
  },
  {
    year: '2018',
    carName: 'Audi',
    model: 'coupe',
    value: 'car'
  }
]

Could anyone please help?

Upvotes: 0

Views: 64

Answers (4)

sergei
sergei

Reputation: 1176

You have a typo in you code. Use comparison with name and carName instead of carName and carName. This code should work:

array2.filter(({carName}) => !array1.some(({name}) => name === carName));

Upvotes: 0

joy08
joy08

Reputation: 9652

You could filter out array2 by comparing its name with carName property. This will give you items of array2 that are not in array1 

const array1 = [{
  name: 'BMW',
  type: 'car'
}]

const array2 = [{
    year: '2020',
    carName: 'BMW',
    model: 'SUV',
    value: 'car'
  },
  {
    year: '2019',
    carName: 'Benz',
    model: 'Sedan',
    value: 'car'
  },
  {
    year: '2018',
    carName: 'Audi',
    model: 'Coupe',
    value: 'car'
  }
]
var result = array2.filter(function(obj) {
  return !array1.some(function(obj2) {
    return obj.carName === obj2.name;
  });
});
console.log(result);

Upvotes: 1

user3839336
user3839336

Reputation: 62

const array1 = [{
  name: 'BMW',
  type: 'car'
}]

const array2 = [{
    year: '2020',
    carName: 'BMW',
    model: 'SUV',
    value: 'car'
  },
  {
    year: '2019',
    carName: 'Benz',
    model: 'Sedan',
    value: 'car'
  },
  {
    year: '2018',
    carName: 'Audi',
    model: 'Coupe',
    value: 'car'
  }
]
   const result1 = array2.filter(value => array1.some(arr1Val => arr1Val.name !== 
   value.carName))
console.log('Result ', result1)

Upvotes: 0

Hassan Imam
Hassan Imam

Reputation: 22534

You just need to compare the name with carName.

const array1 = [{ name: 'BMW', type: 'car' }],
      array2 = [{ year: '2020', carName: 'BMW', model: 'SUV', value: 'car' }, { year: '2019', carName: 'Benz', model: 'Sedan', value: 'car' }, { year: '2018', carName: 'Audi', model: 'Coupe', value: 'car'} ],
      result = array2.filter(o => !array1.some(({name}) => name === o.carName));
console.log('Result ', result)

Upvotes: 1

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