ZKJABLE

摘要：let p1 = new Person() Person.prototype.isPrototypeOf(p1) // return boolean; Object.getPrototypeOf(p1) // return obj; 阅读全文

摘要：function sum(num1, num2){ 2. return num1 + num2; 3.} 4.function callSum1(num1, num2){ 5. return sum.apply(this, arguments); // 传入arguments 对象 6.} 7.fu 阅读全文