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sum-lengths ( seq -- n )


Vocabulary
sequences

Inputs and outputs
seqa sequence of sequences
nan integer


Word description
Outputs the sum of the lengths of all sequences in seq.

Definition
IN: sequences

GENERIC: sum-lengths ( seq -- n )


Methods
USING: kernel math sequences ;

M: object sum-lengths 0 [ length + ] reduce ;


USING: accessors kernel math sequences ;

M: repetition sum-lengths [ length>> ] [ elt>> length ] bi * ;