deep-reduce ( ... obj identity quot: ( ... prev elt -- ... next ) -- ... result )

Vocabulary

sequences.deep

Inputs

obj	an object
identity	an object
quot	a quotation with stack effect ( ... prev elt -- ... next )

Outputs

result

the final result

Word description

Execute a quotation on each nested element of an object and its children, in preorder. The first iteration is called with

identity

and the first element. Subsequence iterations are called with the result of the previous iteration and the next element.

See also

reduce

Definition

USING: kernel ;

IN: sequences.deep

: deep-reduce
    ( ... obj identity quot: ( ... prev elt -- ... next ) -- ... result )
    swapd deep-each ; inline