javascript - Return a promised value to variable in angular.extend() -

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in example below, how can set myvar value return async service method

angular.extend(this, {     myvar: (function() {         getval();     })() });  function getval() {     var d = $q.defer();     myfactory.get()         .then(function (resp) {             d.resolve(resp.data);         });     return d.promise; // myvar should equal resp.data };

i think i'm showing lack of understanding of promises/deferral, advice great.

since myvar variable set anywhere in controller. in initialization can assign fallback value or set undefined. , set after async call success.

angular.extend(vm, {     myvar: 'fallback' });

or: 

angular.extend(vm, { });

then: in controller:

getvar(); function getvar() {     getval().then(function(data){         vm.myvar = data;     }); }  function getval() {     var d = $q.defer();     myfactory.get()         .then(function (resp) {             d.resolve(resp.data);         });     return d.promise; // myvar should equal resp.data };

or more efficiently:

getval();  function getval() {     myfactory.get()         .then(function (resp) {             vm.myvar = resp.data;         }); };

changed this vm removing conflict this keyword may throw.


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