javascript - Check whether all rest requests got response or not in backbone js -


i want callback function called after rest requests got response server in backbone js. function execute after requests got response, not each response.

i know success, error, , complete methods but, these methods executes each response.

please tell me other functions present or called after response received server.

i posted code below fetch data server.

fetchnextpage : function( successcallback, errorcallback, completecallback, context )     {         this.requestnextpage({             remove : false,             success : function( collection, response, options ) {                 if ( typeof successcallback === "function" )                 {                     successcallback.apply( context, [ collection, response, options ]);                 }             },              error : function( collection, response, options ) {                 if ( typeof errorcallback === "function" )                 {                         errorcallback.apply( context, [ collection, response, options ]);                 }             },              complete: function( xhr, status ){                 if ( typeof completecallback === "function" )                 {                         completecallback.apply( context, [ xhr, status ]);                 }               }         });     }

you want jquery $.when() function.

jquery.when( deferreds )

provides way execute callback functions based on 1 or more objects, deferred objects represent asynchronous events.

each jquery ajax request return jqxhr object part of jquery's implementation of promises. jqxhr object returned synchronously, , triggers again when asynchronous operation represents completes. can set listener/callback on 1 (or more) of promises $.when(). value returned asynchronous operation passed callback wrapped then.

$.when(jqxhr1, jqxhr2, jqxhr3).then(function(return1, return2, return3) {     //callback here run after requests returned      //asyncronous operations linked jqxhr 1-3 completed. });

Comments

Post a Comment

Popular posts from this blog

php - failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request -

this code i'm using find latitude , longitude of place: function coords($address){ echo $url="http://maps.googleapis.com/maps/api/geocode/json?address=".$address; $json = file_get_contents(urlencode($url)); $data = json_decode($json, true); print_r($data['results'][0]['geometry']['location']['lat']); print_r($data['results'][0]['geometry']['location']['lng']); } however returns warning: failed open stream: http request failed! http/1.0 400 bad request if use above code in simple procedure works fine not in function. note: have tried curl_init()... method produced same result? instead of encoding whole url encode address part. following code work fine $add='jamshoro phase 2'; $url="http://maps.googleapis.com/maps/api/geocode/json?address=".urlencode($add); $json = file_get_contents($url); $data = json_decode($json, true); print_r($data['r
Read more

java - How to filter a backspace keyboard input -

i have code gives message when key number pressed: txtvalueofclause.addeventfilter(keyevent.key_typed, new eventhandler<keyevent>() { @override public void handle(keyevent t) { char ar[] = t.getcharacter().tochararray(); char ch = ar[t.getcharacter().tochararray().length - 1]; if (!(ch >= '0' && ch <= '9')) { system.out.println("the char entered not number"); t.consume(); } } }); now if press on wrong button , press backspace remove it, error message. how can add backspace input if statement? i have found answer: txtvalueofclause.addeventfilter(keyevent.key_typed, new eventhandler<keyevent>() { @override public void handle(keyevent t) { char ar[] = t.getcharacter().tochararray(); char ch = ar[t.getcharacter().tochar
Read more

java - Show Soft Keyboard when EditText Appears -

i have code in android app, alert dialog , keyboard, , when dialog shown want keyboard appear. not , not sure why? here code: final alertdialog.builder alert = new alertdialog.builder(this); alert.settitle("title"); alert.setmessage("message"); final edittext input = new edittext(this); input.setinputtype(inputtype.type_class_number); alert.setview(input); input.setonfocuschangelistener(new view.onfocuschangelistener() { @override public void onfocuschange(view v, boolean hasfocus) { if (hasfocus) { log.i(tag, "in focus"); inputmethodmanager inputmethodmanager = (inputmethodmanager) getsystemservice(context.input_method_service); inputmethodmanager.showsoftinput(input, inputmethodmanager.show_implicit); } } }); but keyboard not appear though edit text in focus, , tell appear why, doesn't come up? thanks in advance.
Read more