duplicates ( set -- seq )
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Vocabulary
sets

Inputs

set

a set

Outputs

seq	a sequence

Word description
Outputs a sequence consisting of elements which occur more than once in set.

Examples

USING: sets prettyprint ; { 1 2 3 1 2 1 } duplicates .
{ 1 2 1 }

Definition

IN: sets

GENERIC: duplicates ( set -- seq )

Methods

USING: kernel ranges sets ;

M: range duplicates drop f ;


USING: hash-sets kernel sequences sets ;

M: sequence duplicates
    dup length <hash-set> [ ?adjoin ] curry reject ;


USING: kernel sets ;

M: set duplicates drop f ;