How do I extract even elements of an Array?

Question

var arr = [4, 5, 7, 8, 14, 45, 76];

function even(a) {
  var ar = [];

  for (var i = 0; i < a.length; i++) {
    ar.push(a[2 * i + 1]);
  }

  return ar;
}

ale         


        

Answer 1

why don't you try with the % operator. It gives you the remaining of a division.

replace the loop block with

if ((i % 2) === 0) {
    ar.push(a[i])
}