find-from ( ... n seq quot: ( ... elt -- ... ? ) -- ... i elt )
Factor handbook » The language » Collections » Sequence operations » Searching sequences

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Vocabulary
sequences

Inputs

n	a starting index
seq	a sequence
quot	a quotation with stack effect ( ... elt -- ... ? )

Outputs

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-from, search

Definition

USING: kernel sequences.private ;

IN: sequences

: find-from
    ( ... n seq quot: ( ... elt -- ... ? ) -- ... i elt )
    [ do-find-from index/element ] curry bounds-check-call ;
    inline