map function with a helper function

[Mic]

Hi,
I tried to create a map function which should use the following conditions:

 - e.g. chr.no = 5 and chr.no = 6
 - chr.letter between two objects/dicts in chr are not the same and no X

I have the following function but I do not know how to combine it with
`emit`

    var judge = function (no1, no2) {
        var unexpect = "X";
        var letter1 = unexpect, letter2 = unexpect;
        for (var i in this.chr) {
            var chr = this.chr[i];
            if (chr.no == no1) {
                letter1 = chr.letter;
            } else if (chr.no == no2) {
                letter2 = chr.letter;
            }
        }
        if (letter1 != letter2 && letter1 != unexpect && letter2 !=
unexpect) {
            return true;
        }
        return false;
    };


CouchDB has the below content:


    {
      "total_rows":5,
      "offset":0,
      "rows":[
        {
          "_id":"10",
          "_rev":"3-5288068d2c4ef3e6a9d3f8ff4e3377dd",
          "chr":[
            {
              "letter":"T",
              "no":4
            },
            {
              "letter":"A",
              "no":5
            },
            {
              "letter":"X",
              "no":6
            }
          ]
        },
        {
          "_id":"14",
          "_rev":"3-21300d06c31224416b8ff71b71b304d8",
          "chr":[
            {
              "letter":"T",
              "no":4
            },
            {
              "letter":"G",
              "no":5
            },
            {
              "letter":"G",
              "no":6
            }
          ]
        },
        {
          "_id":"7",
          "_rev":"2-1516ba547bdd21724158bc854f39f66b",
          "chr":[
            {
              "letter":"C",
              "no":5
            },
            {
              "letter":"T",
              "no":6
            }
          ]
        },
        {
          "_id":"8",
          "_rev":"2-750078ccc9e74616f33a2537e41b8414",
          "chr":[
            {
              "letter":"C",
              "no":5
            },
            {
              "letter":"T",
              "no":6
            }
          ]
        },
        {
          "_id":"9",
          "_rev":"2-3d68352a2d98c56fd322ae674fb7c38a",
          "chr":[
            {
              "letter":"A",
              "no":5
            },
            {
              "letter":"G",
              "no":6
            }
          ]
        }
      ]
    }

How is it possible to write a map function combine with the above `judge`
function or maybe there is better way to do it?

P.S. I also asked the same question here (
http://stackoverflow.com/questions/27688196/map-function-with-a-helper-function-in-couchdb
 )

Thank you in advance.

Mic