ionic framework - Data not updating in AngularJS -

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i working on web app in ionic. here, have button in menu.html, when clicked should cause function in controllers.js add newdata "data" in appapi.js file getting error. can take look? here's code in menu.html , controllers.html: http://pastebin.com/gw0h2g3p , here appapi.js: http://pastebin.com/jbqqubcp

thanks!

in appapi service

var adddata = function(newdata) {     data[data.length] = newdata; }  return {     getdata: getdata };

adddata private. it's not exposed.

in controller: trying access adddata not available.

 $scope.add = function() {         appapi.adddata($scope.newdata);     }

to fix it: add adddata return object in service

var adddata = function(newdata) { data[data.length] = newdata; }

return {     getdata: getdata,     adddata  : adddata };

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