Vocabulary
sets

Inputs and outputs

set	a set
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: 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