Problem: number stairs

Code: number+stairs/tails_1723684389

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)

(implicit map with implicit range):[[[int]]] 
    9 (integer):int 
    : (append):[[int]] <--arg( B:int A:int ) 
        , (range from 1):[int] 
            $ (= B):int 
        ~ (auto = []):auto