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

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Vocabulary
sequences

Inputs

obj	an object
i	a start index
seq	a sequence

Outputs

n

an index

Word description
Outputs the index of the last element in the sequence equal to obj, traversing the sequence backwards starting from the ith element and finishing at the first. If no element is found, outputs f.

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

Definition

USING: kernel ;

IN: sequences

: last-index-from ( obj i seq -- n )
    rot [ = ] curry find-last-from drop ;