程式語言教學

按此前往javascript完整教學目錄

成員函式鍊：所謂成員函式鍊，是在一行程式碼中執行超過一個成員函式，寫法就像鎖鏈般一個連著一個，讓撰寫變得更為快速，更減少程式碼行數。製作函式鍊的範例如：

function create_student(name_,age_,score_,money_)

{

          var student_=new Object(

          {

                   name:name_,

                   age:age_,

                   score:score_,

                   money:money_,

                   re_name:function(s){this.name=s;return this;},  //成員函式回傳物件本身，使物件在執行成員函式後，在語法上仍是物件本身。

                   add_age:function(n){this.age+=n;return this;},

                   add_score:function(n){this.score+=n;return this;},

                   add_money:function(n){this.money+=n;return this;},

                   show_me:function(){

                             document.write("my name is "+this.name+","+this.age+" years ago."+"</br>");

                             document.write("I got "+this.score+" at this exam, then the teacher give me "+this.money+" $!!");

                             }

          });

          return student_;

}

var s1=create_student("jade",16,80,7000);

var s2=create_student("umei",12,60,10000);

s1.add_score(5).add_money(600).show_me();   //函式鍊在此!

//顯示：

my name is jade,16 years ago.
I got 85 at this exam, then the teacher give me 7600 $!!

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