问在javascript中呈现数组的所有元素时出错

EN

var resultData = [];
      var uniqueparty= [];
      var wincolor = [];
     $.getJSON("https://spreadsheets.google.com/feeds/list/1IoNqeReOPKNFrYMlK2rnJVuMaLeAgnZneLbKYSQ7bs4/od6/public/values?alt=json", function(data) {
        var len = data.feed.entry.length;
        for (var i=0; i<len; i++) {
             //first row "title" column
             var current = data.feed.entry[i];
             resultData[i]= [
              current.gsx$constituency.$t, //0
              current.gsx$winner2010.$t, //1
              current.gsx$winningparty.$t, //2
              current.gsx$candidatename1.$t, //3
              current.gsx$party1.$t,//4
              current.gsx$candidatename2.$t,//5
              current.gsx$party2.$t,//6
              current.gsx$candidatename3.$t,//7
              current.gsx$party3.$t//8
              ]; 
              wincolor[i]=[current.gsx$winningparty.$t];
            }
            uniqueparty = wincolor.filter(
              function(a){
                if (!this[a]) {
                  this[a] = 1; return a;
                }
              },{}
            );
            document.write("Unique Party: "+uniqueparty.length+"<br>");
            document.write("Wincolor: "+wincolor.length);
          });