Array search - Filter

We know find method looks for a single (first) element. But filter will check all passed data and return an array.

The syntax is same as find method,

let results = arr.filter(function(item, index, array) {
  ..................
});

Example:

let usersArrOfObject = [
  {id: 1, name: "John"},
  {id: 2, name: "Pete"},
  {id: 3, name: "Mary"},
  {id: 4, name: "Maths"},
  {id: 5, name: "Mercy"}
];

let outputUsers = usersArrOfObject.filter(item => item.id < 3);

alert(outputUsers.length); // 2
console.log(outputUsers);

From the above we are passing an item and checking the condition which specifies id is less than 3. So passed data as returned as array.