Javascript wildcard Search in array using jQuery

function search_array(a, query_value){
 keke = $.map(a, function (value) {
  re = RegExp(query_value, "gi");
  if(value.match(re)) return value;
  return null;
 });
 return keke
}

usage :

>>> search_array(["gula", "gila", "abu"], "la")

["gula", "gila"]
which im searching for string "la"