xslt - 从最后一个元素中删除逗号

def remove_comma(lst):
    if len(lst) > 0:
        lst[-1] = lst[-1].replace(",", "")
    return lst

function removeComma(lst) {
    if (lst.length > 0) {
        lst[lst.length - 1] = lst[lst.length - 1].replace(",", "");
    }
    return lst;
}