These tests check that, with the prototype fix in place

$H({fruit:"apple", vegetable:"cucumber"}).reject(
  function(el) { return (el[1] == 'cucumber');}
) == $H({fruit:"apple"})

and

$H({fruit:"apple", vegetable:"cucumber"}).findAll(
  function(el) { return (el[1] == 'apple'); }
) == $H({fruit:"apple"})