collect-elements ( element seq -- elements )
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elements ( elt-type element -- seq )

Vocabulary
help.markup

Inputs

element	a markup element
seq	a sequence of words

Outputs

elements

a new sequence

Word description
Collects the arguments of all sub-elements of element whose markup element type occurs in seq.

Notes
Used to implement article-children.

Definition

USING: kernel make sequences ;

IN: help.markup

: collect-elements ( element seq -- elements )
    swap [ elements* ] curry [ each ] curry { } make
    [ rest ] map concat ;