collapse-slice ( m n slice -- m' n' seq )

Vocabulary

sequences

Inputs

m	a non-negative integer
n	a non-negative integer
slice	a slice

Outputs

m'	a non-negative integer
n'	a non-negative integer
seq	a sequence

Word description

Prepares to take the slice of a slice by adjusting the start and end indices accordingly, and replacing the slice with its underlying sequence.

Definition

USING: accessors kernel math ;

IN: sequences

: collapse-slice ( m n slice -- m' n' seq )
    [ from>> ] [ seq>> ] bi [ [ + ] curry bi@ ] dip ; inline