async node.js not working?

Question

JavaScript

There is such a function

getBalance = function(id) {
    connection.query('SELECT balance FROM Users WHERE id = ?', id, function(error, result, fields) {
    	if(error)
    		return error;
        if(result[0]['balance'])
            return result[0]['balance'];
        return 0;
    });
};

I need to get the result from it using the async library, I do this:

var a = async.parallel(getBalance(123123), function(err, callback){
            if (err) throw err;
            return callback;
    });
    console.log(a);

I get underfind, what could be the problem?

Answer 1

async.parallel([getBalance(123123)], function(err, result){
            if (err)   return next(err); //<- custom error handler
            // do result;
           console.log(result);
    });

[getBalance(123123)] or {name:getBalance(123123)}

var getBalance = (callback) => {
    connection.query('SELECT balance FROM Users WHERE id = ?', id, (error, result, fields) => {
    	if(error)
    	   return callback(error);
        if(result[0]['balance'])
            callback(null, result[0]['balance']);
  
    });
      callback(null, 0);
}

;

Answer 2

don't you like native async await?