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Filter array of objects by array of objects [TypeScript] [ES6]


How to filter array of objects by array of objects with conditions.

Interfaces:

interface Person {
    age: number;
    available: boolean;
}

interface PersonFilter {
    predicateFn(arg: Person): boolean;
}

Data:

const persons = [
  {
    "age": 2,
    "available": false
  },
  {
    "age": 5,
    "available": true
  }
];

Conditions to filter:

const filters = [
    {predicateFn: person => person.available},
    {predicateFn: people => person.age > 2}
];

How to filter this array of objects using current filters structure ?

function getFilteredPersons(filters): Person[]{
return persons.filter( ?? );
}    

Expected output:

  [
      {
        "age": 5,
        "available": true
      }
    ]

Solution

  • You can try it with the Array.prototype.every function, it would be something like:

    const persons = [{
        age: 2,
        available: false
      },
      {
        age: 5,
        available: true
      }
    ];
    
    const filters = [{
        predicateFn: person => person.available
      },
      {
        predicateFn: person => person.age > 2
      }
    ];
    
    function getFilteredPersons(filters) {
      return persons.filter(p => filters.every(filter => filter.predicateFn(p)));
    }
    
    console.log(getFilteredPersons(filters));