Problem: Grouping

Code: Grouping/tails_1645506898

Nibbles version: 0.2 | 0.21 | 0.22 | 0.23 | 0.24 | 0.25 | 1.00

Format: Compact | Simple | +Type | Table | JSON | .nbl (DeBruijn) | .nbl (names)

: (append) 
    \ (reverse) 
        `< (sort) 
            . (map) 
                =~ (group by (also sorts)) 
                    _ (= ints) 
                    $ (= A) <--arg( A ) 
                , (length) <--arg( B ) 
                    $ (= B) 
    "\n" (string)