last-index ( obj seq -- n )
Factor handbook » The language » Collections » Sequence operations » Searching sequences

Prev:	index-from ( obj i seq -- n )
Next:	last-index-from ( obj i seq -- n )

Vocabulary
sequences

Inputs

obj	an object
seq	a sequence

Outputs

n

an index

Word description
Outputs the index of the last element in the sequence equal to obj; the sequence is traversed back to front. If no element is found, outputs f.

See also
index, index-from, last-index-from, sorted-index

Definition

USING: kernel ;

IN: sequences

: last-index ( obj seq -- n ) [ = ] with find-last drop ;