AngularJS: How to get the key of a JSON Object - json

Question

I am unsure if this has got anything to do with AngularJS at all and if it is only JSON related.
Anyhow, let us say that we have the following JSON:
$scope.dataSets = {
"names": ["Horace", "Slughorn", "Severus", "Snape"],
"genders": ["Male", "Female"]
}
Now, I am using the ng-repeat directive to print the above as follows:
<div ng-repeat="data in dataSets>
//Continue readig to know what I am expcting here
</div>
What I expect within the <div></div> tags is to print "name" and "genders". That is, I wish to print the keys of the JSON. I have no idea what the keys are, as in they could be anything. How can I do this?

Answer 1

As docs state it:
(key, value) in expression – where key and value can be any user defined identifiers, and expression is the scope expression giving the collection to enumerate.
<div ng-repeat="(key, data) in dataSets">
{{key}}
</div>

Answer 2

for accessing Json key-value pair from inside controller in AngularJs.
for(var keyName in $scope.dataSets){
var key=keyName ;
var value= $scope.dataSets[keyName ];
alert(key)
alert(JSON.stringify(value));
}

Answer 3

if dataSets is an array and not an object you first need to ng-repeat the array items and then the key or value.
<div ng-repeat="item in dataSets">
<div ng-repeat="(key, value) in item">
{{key}}
{{value}}
</div>
</div>
just my 2 cents.

Answer 4

For every dataSet in dataSets, print the key and then iterate through the individual items:
<div ng-repeat="(key, dataSet) in dataSets">
<div>{{key}}</div>
<div ng-repeat="value in dataSet">
{{value}}
</div>
</div>
{{dataset}} can be displayed in one go also, the array would be displayed as a comma separated list of values.