couchdb map function for static user view's

mapfunction.js

function(doc) {
  var userID = 500;
  var userTags = [
       100000036,
       100000065,
       100000077,
       100000046,
       100000062,
       100000103
   ];
  if(userID != doc.userID)
  {
    var matchingTags = 0;

    for (i in doc.userTags)
    {
      // Increment matching count for each matching tag
      if(userTags.indexOf(doc.userTags[i]) != -1) matchingTags++;
    }
	
	if(matchingTags > 0)
	{
		emit(doc.userID, matchingTags)  
	}
    
  }
}

reduceFunctionOnlySum.js

function(keys, values, rereduce) {
  return sum(values);
}

reduceFunctionWithTagIDs.js

function(keys, values, rereduce) {
var rv = {};
for (i in values) {
    var value = values[i];
    for (k in value) {
        rv[k] = (rv[k] || 0) + value[k];
    }
}
return rv;
}