nths ( indices seq -- seq' )

Vocabulary

sequences

Inputs

indices	a sequence
seq	a sequence

Outputs

seq'	a sequence

Word description

Outputs a sequence of elements from the input sequence indexed by the indices.

Examples

USING: prettyprint sequences ; { 0 2 } { "a" "b" "c" } nths .
{ "a" "c" }

Definition

USING: kernel ;

IN: sequences

: nths ( indices seq -- seq' ) [ [ nth ] curry ] keep map-as ;