adjoin ( elt set -- )
Factor handbook » The language » Collections » Sets » Operations on sets

Prev:	cardinality ( set -- n )
Next:	delete ( elt set -- )

Vocabulary
sets

Inputs

elt	an object
set	a set

Outputs
None

Word description
Destructively adds elt to set. For sequences, this guarantees that this element is not duplicated, and that it is at the end of the sequence.

Each mutable set type is expected to implement a method on this generic word.

Examples

USING: prettyprint sets kernel ; V{ "beans" "salsa" "cheese" } clone "nachos" over adjoin "salsa" over adjoin .
V{ "beans" "cheese" "nachos" "salsa" }

Side effects
Modifies set

Definition

IN: sets

GENERIC: adjoin ( elt set -- )

Methods

USING: accessors bit-sets kernel sequences sets ;

M: bit-set adjoin [ t ] 2dip table>> set-nth ;


USING: hash-sets hash-sets.private kernel sets ;

M: hash-set adjoin dup ?grow-hash (adjoin) drop ;


USING: accessors assocs deques kernel linked-sets
linked-sets.private sets ;

M: linked-set adjoin
    [ assoc>> ] [ dlist>> ] bi
    [ 2over key? [ 3dup (delete-at) ] when nip push-back* ]
    curry [ set-at ] 2bi ;


USING: kernel sequences sets ;

M: sequence adjoin [ delete ] [ push ] 2bi ;


USING: hash-sets.wrapped hash-sets.wrapped.private sets ;

M: wrapped-hash-set adjoin wrapper@ adjoin ; inline

This documentation was generated offline from a load-all image. If you want, you can also browse the documentation from within the UI developer tools. See the Factor website for more information.

Factor 0.99 x86.64 (2166, heads/master-60005b6cfd, Apr 11 2022 12:15:04)