Method sortBy2

java/lib/src/main/java/io/github/ccxt/base/Generic.java:109–129

(Object array, Object key1, Object key2, Object desc2)

    }

    public static List<Object> sortBy2(Object array, Object key1, Object key2, Object desc2) {
        boolean desc = (desc2 instanceof Boolean b) ? b : false;
        List<Object> lst = (List<Object>) array;

        if (key1 instanceof String k1 && key2 instanceof String k2) {
            List<Object> sorted = new ArrayList<>(lst);
            sorted.sort(Comparator
                .comparing((Object s) -> {
                    Object v = ((Map<String, Object>) s).get(k1);
                    return v == null ? null : v.toString();
                }, Comparator.nullsFirst(Comparator.naturalOrder()))
                .thenComparing((Object s) -> {
                    Object v = ((Map<String, Object>) s).get(k2);
                    return v == null ? null : v.toString();
                }, Comparator.nullsFirst(Comparator.naturalOrder()))
            );
            if (desc) Collections.reverse(sorted);
            return sorted;
        }
        return null;
    }

    // ---------- filterBy ----------