u010396639的专栏

判断js对象是否是某个名称的实例 方法：通过原型链中构造函数的名称进行判断 function checkClass(obj, class_name) { if (class_name === 'object') return true; if (!obj) return false; let proto = obj.__proto__.constructor; if (proto.name === class_name) return true; return

classTree{ constructor(data,lchild,rchild){ this.data=data; this.lchild=lchild; this.rchild=rchild; } } lettree=newTree('A',newTree('B',null,null),newTre...