Nesting a JSON object using a value in the data. Cross-browser replacement for d3.nest() .key() .entries()

gistfile1.txt

http://jsfiddle.net/mhkeller/ezvuB/

var sets = [
    {
    "uid": "a1",
    "quote": "hey",
    "source": "facebook"},
{
    "uid": "a1",
    "quote": "yo",
    "source": "facebook"},
{
    "uid": "a2",
    "quote": "yo",
    "source": "facebook"}]

var nested = {};

for (var set in sets) {
    if (sets.hasOwnProperty(set)) {

        // If this value is new, make it the key of a new array
        if (!nested[sets[set].uid]) {
            nested[sets[set].uid] = new Array;
        }
        var key = sets[set].uid;
        var entry = sets[set];

        // Get rid of the attribute that is the key
        delete entry.uid

        // Create the nested object
        nested[key].push(entry)



    }
}

console.log('nested', nested)​