411 REFERENCE · Wikibooks
Rebol Programming/header-rules
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
USAGE:
HEAD? series
DESCRIPTION:
Returns TRUE if a series is at its head.
HEAD? is an action value.
ARGUMENTS
series -- (Type: series port)
SOURCE CODE
head?: native[
"Returns TRUE if a series is at its head."
series [series! port!]
]