keys ( assoc -- keys )
Factor handbook » The language » Collections » Associative mapping operations » Lookup and querying of assocs

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Vocabulary
assocs

Inputs

assoc

an assoc

Outputs

keys	an array of keys

Word description
Outputs an array of all keys in the assoc.

See also
values

Definition

IN: assocs

GENERIC: keys ( assoc -- keys )

Methods

USING: assocs kernel ;

M: assoc keys [ drop ] { } assoc>map ;


USING: accessors assocs biassocs ;

M: biassoc keys from>> keys ;


USING: accessors arrays assocs sequences ;

M: enumerated keys seq>> length <iota> >array ; inline


USING: assocs hashtables hashtables.private kernel ;

M: hashtable keys [ drop ] collect-pairs ;


USING: accessors assocs mirrors sequences ;

M: mirror keys object-slots [ name>> ] map ;


USING: assocs persistent.hashtables ;

M: persistent-hash keys >alist keys ;


USING: accessors assocs hashtables.wrapped sequences ;

M: wrapped-hashtable keys
    underlying>> keys [ underlying>> ] map! ;