i have this json { cb="Adiesel", litros=47}, Object , Object { cb="Gasolina 95", litros=1327}, Object { cb="Gasolina 98", litros=130}, i need to transform this in { "Adiesel"=47, "Gasóleo"=1008, "Gasolina 95"=1327, "Gasolina 98"=130}

gistfile1.js

var key, obj, res={}, _i, _len;

collection = [
    {cb:"Adiesel", litros:47},
    {cb:"Gasóleo", litros:1008}
    // etc
];

trans = function(collection){
    for (_i = 0, _len = collection.length; _i < _len; _i++) {
        obj = collection[_i];
        res[obj.cb] = obj.litros;
    }
    return res;
}

console.log(trans(collection));