如何在JavaScript数组中计算重复值

function count() {

    array_elements = ["a", "b", "c", "d", "e", "a", "b", "c", "f", "g", "h", "h", "h", "e", "a"];    array_elements.sort();    var current = null;    var cnt = 0;    for (var i = 0; i < array_elements.length; i++) {        if (array_elements[i] != current) { if (cnt > 0) {     document.write(current + ' comes --> ' + cnt + ' times<br>'); } current = array_elements[i]; cnt = 1;        } else { cnt++;        }    }    if (cnt > 0) {        document.write(current + ' comes --> ' + cnt + ' times');    }}count();