each-index ( ... seq quot: ( ... elt index -- ... ) -- ... )
Factor handbook » The language » Collections » Sequence operations » Sequence combinators

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Vocabulary
sequences

Inputs

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

Outputs
None

Word description
Calls the quotation with the element of the sequence and its index on the stack, with the index on the top of the stack.

Examples

USING: arrays sequences prettyprint ; { 10 20 30 } [ 2array . ] each-index
{ 10 0 } { 20 1 } { 30 2 }

Definition

USING: math sequences.private ;

IN: sequences

: each-index
    ( ... seq quot: ( ... elt index -- ... ) -- ... )
    sequence-index-operator each-integer ; inline