Underscore extend recursive sort (Thanks: Craig Shoemaker)

_sortRecursive.js

_.sortRecursive = function(array, propName, propChild) {

    array.forEach(function(item) {
        var keys = _.keys(item);
        keys.forEach(function(key) {
            if (_.isArray(item[key])) {
                item[key] = _.sortRecursive(item[key], propName);
            } else if (_.isObject(item[key])) {
                if (item[key].hasOwnProperty(propChild)) {
                    item[key][propChild] = _.sortRecursive(item[key][propChild], propName, propChild);
                }
            }
        });
    });

    return _.sortBy(array, propName);
};