Head? - Function Summary

Summary:

Returns TRUE if a series is at its head.

Usage:

head? series

Arguments:

series - The series argument. (must be: series port)

Description:

cds: [ "Rockin' REBOLs" "Carl's Addiction" "Jumpin' Jim" ] print head? cds true

cds: tail cds print head? cds false

until [ cds: back cds print first cds head? cds ] Jumpin' Jim Carl's Addiction Rockin' REBOLs

Related:

head - Returns the series at its head.
tail - Returns the series at the position after the last value.
tail? - Returns TRUE if a series is at its tail.