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

Vocabulary

sequences.deep

Inputs

obj	an object
quot	a quotation with stack effect ( ... elt -- ... ? )
exemplar	a sequence

Outputs

seq	a sequence

Word description

Creates a sequence (of the same type as exemplar) of sub-nodes in the object which satisfy the given quotation, in preorder. This includes the object itself, if it passes the quotation.

Definition

USING: kernel sequences ;

IN: sequences.deep

: deep-filter-as
    ( ... obj quot: ( ... elt -- ... ? ) exemplar -- ... seq )
    [ selector [ deep-each ] dip ] dip [ like ] when* ; inline
    recursive