Array2Binary addition

/*Description:
Given an array containing only integers, add all the elements and return the binary equivalent of that sum.

If the array contains any non-integer element (e.g. an object, a float, a string and so on), return false.

Note: The sum of an empty array is zero.

arr2bin([1,2]) == '11'
arr2bin([1,2,'a']) == false
*/

function arr2bin(arr){
  if(arr.filter(v=>typeof v != 'number').length>0) return false
  return arr.reduce((a,b)=>a+b,0).toString(2)
}