[ <merged> ] keep first like ;
: 2merge ( seq1 seq2 -- seq )
- [ <2merged> ] 2keep drop like ;
+ [ <2merged> ] keepd like ;
: 3merge ( seq1 seq2 seq3 -- seq )
- [ <3merged> ] 3keep 2drop like ;
+ [ <3merged> ] keepdd like ;
M: merged length
seqs>> [ [ length ] [ min ] map-reduce ] [ length ] bi * ; inline