Funciones de map reduce para sumar los intereses de las personas por pais

map_reduce.js

/// SUMA DE INTERESES POR PAIS
var mapFun = function () {
  var intereses = {};
  for (var i = this.intereses.length - 1; i >= 0; i--) {
    intereses[ this.intereses[i] ] = 1;
  }
  emit( this.pais, intereses );
};
var reduceFun = function (key, value) {
  var temp = value[value.length-1];
  for (var i = value.length - 2; i >= 0; i--) {

    var inters = value[i];
    for ( var attr in  inters) {
      if (temp.hasOwnProperty(attr))
        temp[attr] = temp[attr] + inters[attr];
      else
        temp[attr] = inters[attr];
    }
    
  }
  return temp;
};
var finalizeFun = function (key, reducedVal) {
  var intereses = { musica: 0, arte: 0, juegos: 0, peliculas: 0, anime: 0, vida: 0, amanecer: 0, amor: 0, familia: 0, tv: 0, 'medio ambiente': 0, mechanotherapeutic: 0, protectorate: 0, phytopaleontological: 0, springlet: 0, diectasis: 0, sconcheon: 0, noncompetitive: 0, bellonion: 0, hami: 0, accusable: 0, operatable: 0, linitis: 0, hoastman: 0, unlanguid: 0, isokurtic: 0, benchboard: 0, gastroplication: 0, alumiferous: 0, chapterful: 0, yeldrock: 0, axopodia: 0, smokebox: 0, fireworky: 0, semideltaic: 0, intimation: 0, tarsioid: 0, fotui: 0, woft: 0, Mandingo: 0, pretincture: 0, pamper: 0, extraneously: 0, consternation: 0, malleate: 0, thisn: 0, ribbony: 0, Lapland: 0, Monticulipora: 0, cetylene: 0, fie: 0, pluvious: 0, gunl: 0, monsieur: 0, producal: 0, Limnophilidae: 0, daitya: 0, octahedral: 0, pegger: 0 };

  for ( var attr in reducedVal) {
    intereses[attr] = reducedVal[attr];
  }
  return intereses;
};

// db.personas.mapReduce(mapFun, reduceFun, {out: "intereses_pais", finalize: finalizeFun, verbose: true});