How do I check if all elements of an array are null?

Question

What\'s the best way to check for an array with all null values besides using Lodash, possibly with ES6?

var emp = [null, null, null];
if (_.compact(emp).len         


        

Answer 1

You can use Array#every or lodash's _.every() with _.isNull():

var emp = [null, null, null];

var result = emp.every(_.isNull);

console.log(result);