Rebol Programming/header-rules

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USAGE:[edit | edit source]

HEAD? series 

DESCRIPTION:[edit | edit source]

Returns TRUE if a series is at its head.

HEAD? is an action value.

ARGUMENTS[edit | edit source]

  • series -- (Type: series port)

SOURCE CODE[edit | edit source]

head?: native[
  "Returns TRUE if a series is at its head." 
  series [series! port!]
]