cardinality ( set -- n )
Factor handbook » The language » Collections » Sets » Operations on sets

Prev:	members ( set -- seq )
Next:	adjoin ( elt set -- )

Vocabulary
sets

Inputs

set

a set

Outputs

n	a non-negative integer

Word description
Returns the number of elements in the set. All sets support this operation.

Definition

IN: sets

GENERIC: cardinality ( set -- n )

Methods

USING: accessors bit-sets math.bitwise sets ;

M: bit-set cardinality table>> bit-count ;


USING: kernel sets ;

M: f cardinality drop 0 ;


USING: accessors hash-sets kernel math sets ;

M: hash-set cardinality [ count>> ] [ deleted>> ] bi - ; inline


USING: accessors assocs linked-sets sets ;

M: linked-set cardinality assoc>> assoc-size ;


USING: accessors ranges sets ;

M: range cardinality length>> ;


USING: sequences sets ;

M: sequence cardinality fast-set cardinality ;


USING: sequences sets ;

M: set cardinality members length ;


USING: accessors hash-sets.wrapped sets ;

M: wrapped-hash-set cardinality underlying>> cardinality ;
    inline