AsyncNodeJS: Error: Callback was already called
javascript,node.js,jquery-callback,asynccallback
If callback throws an error, it is going to get called in both the then and the following catch. You should probably be calling it in the done function. .then(function(existingFriend) { if(existingFriend === null) { friends.push({ 'details': { 'phoneNumber': phonenum } }); } else { friends.push({'details': existingFriend}); } }) .catch(function(err)...
What happens when an asynchronous callback calls a virtual function, while base class constructor is not returned yet?
c++,constructor,callback,virtual,asynccallback
According to the C++ Lite FAQ 23.5, Base::virt() will be called. Anyway, it's really not something you want to do - if your object is used by another thread without proper initialization, you can encounter all sorts of nasty race conditions. For example, what would happen if the second thread...
How to implement reusable callback functions
javascript,node.js,callback,reusability,asynccallback
In general, there is no getting around having to create another function in-line that has access to the closures. You can create the function in-line by having a simple anonymous function that passes some arguments to the parent callback as parameters while accepting the rest (i.e. a partial function), or...
How to do ajax postback with typeahead directive of Angular-ui-bootstrap
angularjs,angular-ui,asynccallback,angular-ui-typeahead
Just call an angular service from your controller that returns the data. It can use $http or any other method. In this example it's calling a service that returns a promise. When it completes it will call the then() bit of code and you can do what you want. $scope.callBack...
How to use callbacks to make Asynchronous calls in Swift so that main UI does not Hang?
ios,swift,parse.com,callback,asynccallback
You are getting confuse between background threads and completion handler. logInWithUsernameInBackground is a async function that runs in the background however all the code that runs in the completion handler runs back in the main thread: completion: ((result:Bool?) -> Void)!) {//The code here runs in the main thread} So basically...
Node Callback hell + async advice
node.js,callback,async.js,asynccallback
Yes there are at least 100 different ways to solve this problem and many of them are not necessarily better than any other -- it depends on what you and your team are most comfortable with and what works best for your needs. You can really only figure that out...
How do you stop a function when an Error object is received?
node.js,meteor,error-handling,callback,asynccallback
I haven't seen exactly this way of coding before, so it's difficult to comment if this is the correct way without knowing a bit more about what you are really trying to do. I assume that the block: try { var resultOne = requestSync() var resultTwo = callback(resultOne) // more...
In GWT project CellTable created with using AsyncDataProvider, isn't showed
java,gwt,gwt-rpc,celltable,asynccallback
Your CellTable has a height of zero. This is why you don't see it. You either have to set height of your CellTable in code, or you should add it to a widget that implements ProvidesResize interface, like a LayoutPanel....
Javascript: hold vars value before changing
javascript,for-loop,callback,asynccallback
You can create a scope for each iteration and deal with this problem. A simple example can be like this : for (var i =0; i<10 ; i++){ (function(j){ $.get('https://stackoverflow.com',function(){ console.log("I am from callback with the value of j ",j); }) })(i); } Updated the code sample with passing arguments...
Send db-query-result to client
node.js,socket.io,node-mysql,asynccallback
You might be sending the locations object back, which is always undefined. Try: io.on('connection', function(socket){ socket.on('admin', function() { getUserInfo(function(e,c){ if(!e){ socket.emit('locations', c); } }); }); }); ...