javascript - angular js - missing : after property id -

i'm using angular js creating json, when tried make json shown below

$scope.newcolumns =[{"file 1":"file1.png"},{"file 1":"file2.png"}]

i'm getting missing : after property id

my code given below

 $scope.newcolumns = [];     angular.foreach( $scope.datas, function(data){             $scope.newcolumns.push({data.id : data.value});     });

can please tell me solution this

i think need this,

var obj={}; obj[data.id]= data.value; $scope.newcolumns.push(obj);

{data.id : data.value} not valied syntax data.id should name property cannot variable. if need have variable field names need above.

And