deep-filter ( ... obj quot: ( ... elt -- ... ? ) -- ... seq )
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 -- ... ? )

Outputs

seq	a sequence

Word description
Creates a sequence of sub-nodes in the object which satisfy the given quotation, in preorder. This includes the object itself, if it passes the quotation.

See also
filter

Definition

USING: kernel ;

IN: sequences.deep

: deep-filter
    ( ... obj quot: ( ... elt -- ... ? ) -- ... seq )
    over [ branch? ] 1guard deep-filter-as ; inline