[js高手之路]寄生組合式繼承的優(yōu)勢詳解

function Person( uName ){
      this.skills = [ 'php', 'javascript' ];
      this.userName = uName;
    }
    Person.prototype.showUserName = function(){
      return this.userName;
    }
    function Teacher ( uName ){
      Person.call( this, uName );
    }
    Teacher.prototype = new Person();

    var oT1 = new Teacher( 'ghostwu' );
    oT1.skills.push( 'linux' );
    var oT2 = new Teacher( 'ghostwu' );
    console.log( oT2.skills ); //php,javascript
    console.log( oT2.showUserName() ); //ghostwu

function Person( uName ){
      this.skills = [ 'php', 'javascript' ];
      this.userName = uName;
    }
    Person.prototype.showUserName = function(){
      return this.userName;
    }
    function Teacher ( uName ){
      Person.call( this, uName );
    }

    function object( o ){
      var G = function(){};
      G.prototype = o;
      return new G();
    }

    function inheritPrototype( subObj, superObj ){
      var proObj = object( superObj.prototype ); //復(fù)制父類superObj的原型對象
      proObj.constructor = subObj; //constructor指向子類構(gòu)造函數(shù)
      subObj.prototype = proObj; //再把這個對象給子類的原型對象
    }

    inheritPrototype( Teacher, Person );

    var oT1 = new Teacher( 'ghostwu' );
    oT1.skills.push( 'linux' );
    var oT2 = new Teacher( 'ghostwu' );
    console.log( oT2.skills ); //php,javascript
    console.log( oT2.showUserName() ); //ghostwu