title: MongoDB Map Reduce
body: <p>Hi I had following document in collection</p>
  
  <pre><code>{
   "_id" : ObjectId("5236b303e4b074ca9f4ed453")
   "Commands":{
      "netstat -tulpn":"Active Internet connections (only servers)
  Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
  tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      2285/mysqld         
  tcp        0      0 0.0.0.0:63342               0.0.0.0:*                   LISTEN      3992/java           
  tcp        0      0 0.0.0.0:33359               0.0.0.0:*                   LISTEN      1913/rpc.statd      
  tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      1794/rpcbind        
  tcp        0      0 0.0.0.0:3216                0.0.0.0:*                   LISTEN      3485/skype          
  tcp        0      0 0.0.0.0:28017               0.0.0.0:*                   LISTEN      3821/mongod         
  tcp        0      0 192.168.122.1:53            0.0.0.0:*                   LISTEN      2628/dnsmasq        
  tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      2147/sshd           
  tcp        0      0 127.0.0.1:44567             0.0.0.0:*                   LISTEN      11436/GoogleTalkPlu 
  tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      1987/cupsd          
  tcp        0      0 127.0.0.1:6942              0.0.0.0:*                   LISTEN      3992/java           
  tcp        0      0 127.0.0.1:55777             0.0.0.0:*                   LISTEN      11436/GoogleTalkPlu 
  tcp        0      0 127.0.0.1:6311              0.0.0.0:*                   LISTEN      5088/Rserve         
  tcp        0      0 0.0.0.0:27017               0.0.0.0:*                   LISTEN      3821/mongod         
  tcp        0      0 127.0.0.1:9001              0.0.0.0:*                   LISTEN      2382/java           
  tcp        0      0 :::111                      :::*                        LISTEN      1794/rpcbind        
  tcp        0      0 :::22                       :::*                        LISTEN      2147/sshd           
  tcp        0      0 :::36441                    :::*                        LISTEN      1913/rpc.statd      
  udp        0      0 0.0.0.0:111                 0.0.0.0:*                               1794/rpcbind        
  udp        0      0 127.0.0.1:39287             0.0.0.0:*                               3485/skype          
  udp        0      0 0.0.0.0:631                 0.0.0.0:*                               1987/cupsd          
  udp        0      0 0.0.0.0:3216                0.0.0.0:*                               3485/skype          
  udp        0      0 0.0.0.0:52777               0.0.0.0:*                               1913/rpc.statd      
  udp        0      0 0.0.0.0:817                 0.0.0.0:*                               1913/rpc.statd      
  udp        0      0 192.168.122.1:53            0.0.0.0:*                               2628/dnsmasq        
  udp        0      0 0.0.0.0:697                 0.0.0.0:*                               1794/rpcbind        
  udp        0      0 0.0.0.0:67                  0.0.0.0:*                               2628/dnsmasq        
  udp        0      0 0.0.0.0:68                  0.0.0.0:*                               18609/dhclient      
  udp        0      0 :::111                      :::*                                    1794/rpcbind        
  udp        0      0 :::697                      :::*                                    1794/rpcbind        
  udp        0      0 :::47419                    :::*                                    1913/rpc.statd    "
     }
  }
  </code></pre>
  
  <p>and my map reduce code was given below</p>
  
  <pre><code> var mapfunction = function(){
    var key,values;
        for (var i in this.Commands) {
           key = {id:this._id};
               values = {commands:this.Commands};
               emit(key,values);
      }
   }
   var reducefunction = function(key,values){
   var reduced = {netstat:[]};
    for(var i =0 ; i&lt; values.length;i++){
          reduced.netstat = values[i].commands.netstat -tulpn;
       }
       return reduced;
     }
   db.collectioname.mapReduce(mapfunction,reducefunction,{
   out: {replace:"final"}
   })
  </code></pre>
  
  <p>When I was run this code mongoshell it shows following error
  "JavaScript execution failed: map reduce failed:{
      "errmsg" : "exception: JavaScript execution failed: ReferenceError: tulpn is not defined near '.netstat -tulpn;         '  (line 5)",
      "code" : 16722,
      "ok" : 0
   }</p>
  
  <p>Can any one tell me why mongo map reduced not worked on key which contains spaces in two words? Any one knows how to solved this issues? </p>