javascript - Create An Array Dynamically, Then Loop Through Another Array To Compare If Data Exist -

what trying achieve create array dynamically , use array compare array if data exist.

what happening right code compare arrays executing before array finish creating. comparing data empty array.

what technique can use make code execute code a when code a finished execute code b?

var awayteamplayersplayedarray = []; vm.awayteamplayers = $firebasearray(awayteamplayersquery);  // add data awayteamplayersplayedarray angular.foreach(vm.awayteamplayersplayed, function(value, key) {     var awayteamplayerref = new firebase(firebase_url + 'players/' + key);     var awayteamplayer = $firebaseobject(awayteamplayerref);     awayteamplayer.$loaded().then(function() {         awayteamplayersplayedarray.push(awayteamplayer.name);         console.log(awayteamplayersplayedarray)     }); });  // loop through vm.awayteamplayers see if exist in awayteamplayersplayedarray angular.foreach(vm.awayteamplayers, function(value, key) {     if(awayteamplayersplayedarray.indexof(value.name) > -1) {         console.log(value.name + ' yes');     } else {         console.log(value.name + ' no');     } }); 

you should use loop after promises finished.

var allpromises = []; // add data awayteamplayersplayedarray angular.foreach(vm.awayteamplayersplayed, function(value, key) {   var awayteamplayerref = new firebase(firebase_url + 'players/' + key);   var awayteamplayer = $firebaseobject(awayteamplayerref);   var promise = awayteamplayer.$loaded().then(function() {     awayteamplayersplayedarray.push(awayteamplayer.name);     console.log(awayteamplayersplayedarray);   });   allpromises.push(promise); }); $q.all(allpromises).then(function() {   // loop through vm.awayteamplayers see if exist in awayteamplayersplayedarray    angular.foreach(vm.awayteamplayers, function(value, key) {     if(awayteamplayersplayedarray.indexof(value.name) > -1) {       console.log(value.name + ' yes');     } else {       console.log(value.name + ' no');     }   }); });