JS常用的设计模式(14)—— 备忘录模式

var Page = function(){ 
   var page = 1, 
      cache = {}, 
      data; 
   return function( page ){ 
      if ( cache[ page ] ){ 
               data =  cache[ page ]; 
               render( data ); 
      }else{ 
               Ajax.send( ‘cgi.xx.com/xxx‘, function( data ){ 
                   cache[ page ] = data; 
                   render( data ); 
               }) 
      } 
    } 
}()