text: const Person = function(name){
      this.name = name
  }
  Person.prototype.getName = function(){
      console.log(this.name);
  }
  
  Person.prototype.name = 'name'
  
  const Man = function(sex){
      this.sex = sex
  }
  Person.prototype.getSex = function(){
      console.log(this.sex);
  }
  
  const _extends = function(Sup, Sub){
      for(var k in Sup){
          if (Sup.hasOwnProperty(k)){
              Sub[k] = Sup[k];
          }
      }
      Sub.prototype = Sup.prototype;
      var obj = 
  }
  
  