实现了，一个在Javascript

Question

关系，我想要实现具有-A在Javascript关系， 在这里有Department对象和部门有多个学生，所以在厅中引用Student对象的数组，

这里是代码，

(function(){ 
    alert(" Hi !!!!! "); 

    var engBranch = { 
     compEng : "Bachelor of Engineering in Computer Science", 
     mechEng : "Bachelor of Engineering in Mechanical", 
     cvlEng : "Bachelor of Engineering in Civil", 
     prodEng : "Bachelor of Engineering in Production", 
     elecEng : "Bachelor of Engineering in Electrical", 
     extcEng : "Bachelor of Engineering in Electronics and Telecomminication" 
    }; 



    var StudentIdGenerator = function(studentId,dept){ 
     var _studentId = ""; 

     if(dept == engBranch.compEng){ 
      _studentId = "CS"+studentId; 
     }else if(dept == engBranch.mechEng){ 
      _studentId = "M"+studentId; 
     }else if(dept == engBranch.cvlEng){ 
      _studentId = "CVL"+studentId; 
     }else if(dept == engBranch.prodEng){ 
      _studentId = "P"+studentId; 
     }else if(dept == engBranch.elecEng){ 
      _studentId = "ELC"+studentId; 
     }else if(dept == engBranch.extcEng){ 
      _studentId = "EXTC"+studentId; 
     } 

     return _studentId; 
    } 

    var Student = function(studentName,studentId,department){ 

     var _studentId = StudentIdGenerator(studentId,department); 

     return function(){ 
      this.getStudentName = function(){ 
       return studentName; 
      } 

      this.getStudentId = function(){ 
       return _studentId; 
      } 

      this.display = function(){ 
       return "The Student Name is "+this.getStudentName()+" having ID "+this.getStudentId(); 
      } 
     }; 
    } 

    Student.prototype.display = function(){ 
     return "The Student Name is "+this.getStudentName()+" having ID "+this.getStudentId(); 
    } 

    var Department = function(deptName,deptId){  

     this.getDeptName = function(){ 
      return deptName; 
     } 

     this.getDeptId = function(){ 
      return deptId; 
     } 

     this.setStudents = function(students){ 
      this.students = students; 
     } 

     this.getStudents = function(){ 
      return this.students; 
     } 
    } 

    Department.prototype.display = function(){ 
     var str = "This is department, "+this.getDeptName()+", Students Belonging to this department are \n"; 

     for(var x=0; x < this.getStudents().length;x++){ 
      str += this.getStudents()[x].display()+"\n"; 
     } 

     return str; 
    } 


    var department = new Department(engBranch.cvlEng,"CMP007"); 

    var studentArray = [ 
          new (Student("Jack Nicholson","0021",department.getDeptName()))(), 
          new (Student("Heidi Klum","0043",department.getDeptName()))(), 
          new (Student("Stephen Halkwins","0345",department.getDeptName()))(), 
          new (Student("Jay Leno","1045",department.getDeptName()))(), 
          new (Student("Tomy Lee Johnes","3475",department.getDeptName()))(), 
          new (Student("Oliver Jackson","7345",department.getDeptName()))() 
         ]; 

    department.setStudents(studentArray); 

    alert(department.display()); 

    })(); 

在上面的代码，对象“engBranch”具有所有工科中可用的流。

有一个独立的函数StudentIdGenerator（），它的职责是创建一个StudentId，具体取决于学生所属的部门。

本身返回一个新函数的Student Constuctor函数，请参阅Student函数返回的内容。

这是根本不需要对学生的原型显示功能，请忽略它，

部门构造器功能，

而且在系的原型链中的显示功能，

所以，我的问题是，我的例子是否是一个适当的拥有一对多关系的实现。

我可以做一些新的或额外的下面的代码。

等待你的答复

Answer 1

尽管这是一个老问题，这个环节可能会有所帮助：

http://www.w3resource.com/java-tutorial/inheritance-composition-relationship.php

@Rahul，看看那个，让我知道你是否有进一步的问题。