Javascript:filter array for even square

 

filter an array which are even

Code:

let arr = [2, 3, 4, 5, 6, 7];

let result = arr.flatMap((item) => {

    if (item % 2 === 0) {

        return [item * item];

    }

    return [];

});

console.log(result);

Output:

[4, 16, 36]

Explanation:

  flatMap is combination of filter & map.If no value is to be

returned is empty array & return value shoulld be put i array syntax.