var json = {
    itema: {stuff: 'stuff'},
    itemb: {stuff: 'stuff'},
    itemc: {stuff: 'stuff'},
    itemd: {stuff: 'stuff'}
}

print json.items()
[{stuff: 'stuff'},{stuff: 'stuff'},{stuff: 'stuff'},{stuff: 'stuff'}]

function items(obj) {
 var i, arr = [];
 for(i in obj) {
   arr.push(obj[i]);
 }
 return arr;
}

>>> {1:2, 2:3}.items()
[(1, 2), (2, 3)]
>>> {1:2, 2:3}.values()
[2, 3]

function items(obj){

    var ret = [];
    for(v in obj){
        ret.push(Object.freeze([v, obj[v]]));
    }
    return Object.freeze(ret);
}