let list = $("#test-div li"),strArr = ["Pascal", "Lua", "Ruby"],
ul = $("#test-div>ul"),
i = 0;
list.each((a, b) => { strArr.push($(b).find("span").text()); })
strArr.sort();
ul.children().remove();
while (strArr.length) {
let text = strArr.shift();
ul.append(`<li><span>${text}</span></li>`)
}
懒喵