Rebol Programming/default
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USAGE:[edit | edit source]
DEFAULT 'word value
DESCRIPTION:[edit | edit source]
Set a word to a default value if it hasn't been set yet.
DEFAULT is a function value.
ARGUMENTS[edit | edit source]
- word -- The word (use :var for word! values) (Type: word set-word lit-word)
- value -- The value (Type: any)
SOURCE CODE[edit | edit source]
default: func [ {Set a word to a default value if it hasn't been set yet.} 'word [word! set-word! lit-word!] "The word (use :var for word! values)" value "The value" ][ unless all [value? word not none? get word] [set word :value] :value ]