Recursively merge properties and return a new object

merge.js

/**
 * Recursively merge properties
 * and return a new object
 * `merge(a, b[, ...])`
 *
 * @return object
 */
function merge() {
    var dst = {},
        src,
        p,
        args = [].splice.call(arguments, 0);

    while (args.length > 0) {
        src = args.splice(0, 1)[0];

        if ($.type(src) === 'object') {
            for (p in src) {
                if (src.hasOwnProperty(p)) {
                    if ($.type(src[p]) === 'object') {
                        dst[p] = merge(dst[p] || {}, src[p]);
                    } else {
                        dst[p] = src[p];
                    }
                }
            }
        }
    }

    return dst;
}