deep-map ( ... obj quot: ( ... elt -- ... elt' ) -- ... newobj )
Factor handbook » The language » Collections » Sequence operations » Deep sequence combinators

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Vocabulary
sequences.deep

Inputs

obj	an object
quot	a quotation with stack effect ( ... elt -- ... elt' )

Outputs

newobj

the mapped object

Word description
Execute a quotation on each nested element of an object and its children, in preorder. That is, the result of the execution of the quotation on the outer is used to map the inner elements.

See also
map

Definition

USING: kernel sequences ;

IN: sequences.deep

: deep-map
    ( ... obj quot: ( ... elt -- ... elt' ) -- ... newobj )
    [ call ] keep over branch?
    [ [ deep-map ] curry map ] [ drop ] if ; inline recursive