last ( seq -- elt )
Factor handbook » The language » Collections » Sequence operations » Accessing sequence elements

Prev:	?second ( seq -- elt/f )
Next:	?last ( seq -- elt/f )

Vocabulary
sequences

Inputs

seq	a sequence

Outputs

elt

an object

Word description
Outputs the last element of a sequence.

Errors
Throws an error if the sequence is empty.

See also
first, first2, last2, but-last, but-last-slice, rest, rest-slice

Definition

USING: sequences.private ;

IN: sequences

: last ( seq -- elt )
    index-of-last bounds-check-head nth-unsafe ; inline