Getting all selected checkboxes in an array

foo.js

$('#process').on('click', function(){
  var checkboxs_checked = [];
 
  $("input:checkbox:checked").each(function() {
    checkboxs_checked.push($(this).val());
  });
 
  console.log(checkboxs_checked);
  if(checkboxs_checked.length == 0)
    alert('Seleccione al menos una hora extra para procesar!');
});