clumps
Factor handbook » The language » Collections » Sequence operations » Groups and clumps

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Vocabulary
grouping

Class description
Instances are virtual sequences whose elements are overlapping fixed-length subsequences of an underlying sequence. Clumps are mutable and resizable if the underlying sequence is mutable and resizable, respectively.

New clumps are created by calling <clumps> and <clumps>.

See also
circular-clumps, groups

Definition

USING: grouping.private ;

IN: grouping

TUPLE: clumps < chunking ;

Methods

USING: accessors grouping grouping.private kernel math ;

M: clumps group@ [ n>> over + ] [ seq>> ] bi ; inline


USING: accessors grouping kernel math math.order sequences ;

M: clumps length
    dup seq>> length
    [ drop 0 ] [ swap [ 1 + ] [ n>> ] bi* [-] ] if-zero ; inline


USING: accessors grouping kernel math sequences ;

M: clumps set-length [ n>> + 1 - ] [ seq>> ] bi set-length ;
    inline