how to get json data using jquery

[doforumda]

How can I get the comments from below json data?

{
"data":
[
    {
        "id":"123",
        "from":{"name":"name","id":"12"},
        "message":"Message",
        "comments": {
                        "data":
                        [
                            {
                                "id":"342",
                                "from":{"name":"name","id":"32"},
                                "message":"comment message 1"
                            },
                            {
                                "id":"341",
                                "from":{"name":"name","id":"21"},
                                "message":"comment message 2"
                            }
                        ],
                        "count":2
                    }
    },
    {
        "id":"143",
        "from":{"name":"name","id":"52"},
        "message":"Message",
        "comments": {
                        "data":
                        [
                            {
                                "id":"362",
                                "from":{"name":"name","id":"72"},
                                "message":"comment message 1"
                            },
                            {
                                "id":"341",
                                "from":{"name":"name","id":"41"},
                                "message":"comment message 2"
                            }
                        ],
                        "count":2
                    }
    }
]
}

I know how to get id, from and message. but I do not know how can I get data inside comments.

here is my jquery code

$.getJSON(newsfeed_url,function(d) {
    $.each(d.data, function(i,res) {
        html += "<div class='container'>";
        html += "<li>"+ res.from.name +"</li>";
        html += "<li class='message'>" + res.message + "</li>";
        html += "<li>Comments: " + res.comments.count + "</li>";

        $.each(res.comments.data, function(i, comment) {
            html += "<li class=''>" + comment.message + "</li>";
        });
        html += "</div>";            
    });
    html += "</ul>";
    $("#contents").html(html);
});

my current code does get res.from.name, res.comments.count but it does not get data inside comments i.e. res.comments.data.

how can I achieve it?