javascript - Loop and get key/value pair for JSON array using jQuery

Question

I'm looking to loop through a JSON array and display the key and value.

It should be a simplified version of the following post, but I don't seem to have the syntax correct: jQuery 'each' loop with JSON array

I also saw the post Get name of key in key/value pair in JSON using jQuery?, but it also seemed like lots of code for a simple activity.

This illustrates what I'm looking for (but it doesn't work):

var result = '{"FirstName":"John","LastName":"Doe","Email":"[email protected]","Phone":"123 dead drive"}';
$.each(result, function(k, v) {
             //display the key and value pair
            alert(k + ' is ' + v);
        });

There is no mandatory jQuery requirement, but it is available. I can also restructure the JSON if it cuts down the required code.

Answer 1

You have a string representing a JSON serialized JavaScript object. You need to deserialize it back to a JavaScript object before being able to loop through its properties. Otherwise you will be looping through each individual character of this string.

var resultJSON = '{"FirstName":"John","LastName":"Doe","Email":"[email protected]","Phone":"123 dead drive"}';
var result = $.parseJSON(resultJSON);
$.each(result, function(k, v) {
    //display the key and value pair
    alert(k + ' is ' + v);
});

Live demo.