add arrayFlatEqual
add arrayFlatEqual


Former-commit-id: ea3dcd7306f8dd8cf61eb396fcd867c9ca0f2a97
mvertes/skale-engine,skale-me/skale-engine,skale-me/skale-engine,mvertes/skale-engine,mvertes/skale-engine,skale-me/skale-engine