Return from callback function in Javascript

Question

How do I get the return value from inside a value of node.js/javascript callback?

function get_logs(){
    User_Log.findOne({userId:req.user._id}, function(err,          


        

Answer 1

In node.js almost all the callbacks run after the function returns , so you can do something like this

function get_logs(){
    User_Log.findOne({userId:req.user._id}, function(err, userlogs){
        if(err) throw err;
        if(userlogs){
            // logs = userlogs.logs;
               do_something(logs)
        } else {
            console.log('No logs')
        }
    })
}