Filter nested object by keys using JavaScript

Suppose, we have an array of objects like this −

const arr = [{ 'title': 'Hey',
   'foo': 2,
   'bar': 3
}, {
   'title': 'Sup',
   'foo': 3,
   'bar': 4
}, {
   'title': 'Remove',
   'foo': 3,
   'bar': 4
}];

We are required to write a JavaScript function that takes in one such array as the first input and an array of string literals as the second input.

Our function should then prepare a new array that contains all those objects whose title property is partially or fully included in the second input array of literals.

Example

The code for this will be −

const arr = [{ 'title': 'Hey',
   'foo': 2,
   'bar': 3
}, {
   'title': 'Sup',
   'foo': 3,
   'bar': 4
}, {
   'title': 'Remove',
   'foo': 3,
   'bar': 4
}];
const filterTitles = ['He', 'Su'];
const filterByTitle = (arr = [], titles = []) => {
   let res = [];
   res = arr.filter(obj => {
      const { title } = obj;
      return !!titles.find(el => title.includes(el));
   });
   return res;
};
console.log(filterByTitle(arr, filterTitles));

Output

And the output in the console will be −

[ { title: 'Hey', foo: 2, bar: 3 }, { title: 'Sup', foo: 3, bar: 4 } ]