~~~ /*let fn = function () { // let ary = [].slice.call(arguments, 0); // let ary = [...arguments]; //=>把类数组转换为数组 let ary = Array.from(arguments);//=>把类数组转换为数组 ary.sort(function (a, b) { return a - b; }).pop(); ary.shift(); return (eval(ary.join('+')) / ary.length).toFixed(2); };*/ let fn = function (...ary) { ary.sort(function (a, b) { return a - b; }).pop(); ary.shift(); return (eval(ary.join('+')) / ary.length).toFixed(2); }; console.log(fn(10, 9.8, 9.5, 8.7, 8.8, 8, 9.2, 8.9)); ~~~