Vocabulary
sequences

Inputs and outputs

n	a starting index
seq	a sequence
quot	a quotation with stack effect ( ... elt -- ... ? )
i	the index of the first match, or f
elt	the first matching element, or f

Word description
Applies the quotation to each element of the sequence in turn, until it outputs a true value or the end of the sequence is reached. If the quotation yields a true value for some sequence element, the word outputs the element index and the element itself. Otherwise, the word outputs an index of f and f as the element.

See also
find, find-last, find-last, find-last-from, search

Definition

USING: math sequences.private ;

IN: sequences

: find-from
( ... n seq quot: ( ... elt -- ... ? ) -- ... i elt )
[ (find-integer) ] (find-from) ; inline