node.js - dictionary changes when passed to callback - node.js

Question

I am using the async.map function to call a neo4j database on each element of "arrayOne".
async.map(
arrayOne,
function(item, callback){
getClientsNb({id:item},function (err, res) {
if (err) {console.log(err); return callback(err);}
console.log(res.results[0].data); //1
callback(null,res.results[0].data);
});
},
function(err,res) {
if (err) return console.log(err);
console.log(res); //2
}
)
The first console.log displays what I want:
[ { row: [ 'DIE ZAUBERFLOETE-2013', 1355 ] } ]
But the second console.log in the final function does not display the same result:
[ { row: [Object] } ],
Where does it come from? I would like to have the same result in the second console.log.
NB: the getClientsNb function is the following:
function getClientsNb(param, callback) {
request.post({
uri: httpUrlForTransaction,
json: {statements: [{
statement: 'MATCH (n:Show {id:{id}})<-[:BUYS]-(m) RETURN n.name, count(distinct m)',
parameters: param}]}
},
function (err, res, body) {
if (err) {
console.log(err);
return callback(err)
} else {
return callback(null,body)
}
}).auth('neo4j', password, true);
}

Answer 1

[EDITED]
By changing the second console.log() call to output the data as JSON, you can display more details about what you are actually getting back: console.log("%j", res);. The result is probably in that Object.
Additional issue
This may or may not not solve the issue you are asking about, but you do have a logic error with respect to error handling.
async.map() requires that its callback be called once for every item in the array. But in your code, if the anonymous callback passed to getClientsNb() is passed an err value, it returns without ever calling callback.
This code fixes the above issue:
async.map(
arrayOne,
function(item, callback){
getClientsNb({id:item}, function (err, res) {
if (err) { console.log(err); return callback(err); }
console.log(res.results[0].data); //1
callback(null,res.results[0].data);
});
},
function(err,res) {
if (err) return console.log(err);
console.log(res); //2
}
)