javascript - Cannot set property in an object in angular js -

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this question has answer here:

$scope.objectdata = {}; $scope.objectdata[key]["digits"] =  set.first+','+set.second+','+set.third+','+set.fourth;

here key numerical value.the error 

typeerror: cannot set property 'digits' of undefined

you need set value of $scope.objectdata[key] object before can add more keys it.

$scope.objectdata[key] = {}; $scope.objectdata[key]['digits'] = 'foo';

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