Looping through Dynamic JSON String

I have a POST request which receives a JSON String as a result. The fields, the values, or how deep the array is? These all are unknown. So, I need to loop through each of the json value, its index and its value and perform actions based on it. $.post( "test.php", { action: 'someaction', param: '2' }, function(data) { //now data is a json string $.each(data, function() { key = data.key; //i need to retrieve the key value = data.value; //i need to retrieve the value also //now below here, I want to perform action, based on the values i got as key and values } }, "json" ); How can i get the values of JSON seperated as `key` and `value`?

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