fighting__hg的博客

1. typeof运算符和普通的function一样 1 2 var func = a => a console.log(typeof func); // "function" 　　 2. instanceof也返回true，表明也是Function的实例 1

递归： var a = [];function arr(index){if(a.length<100){a.push(index);arr(index+1)}};arr(0);console.log(a); function arr(num){return num<0 :="" arr="" num-1="" concat="" num="" arr="" 100="" new="" array=