REBOL提供如下几种函数：
NATIVE、FUNCTION、MEZZANINE、OPERATOR、ROUTINE
2.求值函数
2.1参数
friend: [email protected] message: "message in a bottle" send friend message
send [email protected] "message in a bottle"
send friend ** Script Error: send is missing its message argument. ** Where: send friend
send friend message "urgent"
send friend detab copy message
send friend (detab (copy message))
file: %image insert tail insert file %graphics/ %.jpg print file graphics/image.jpg
insert (tail (insert file %graphics/)) %.jpg
2.2参数数据类型
send 1234 "numbers"
** Script Error: send expected address argument of type: email block.
** Where: send 1234 "numbers"
help send
USAGE:
SEND address message /only /header header-obj
DESCRIPTION:
Send a message to an address (or block of addresses)
SEND is a function value.
ARGUMENTS:
address -- An address or block of addresses (Type: email block)
message -- Text of message. First line is subject. (Type: any)
REFINEMENTS:
/only -- Send only one message to multiple addresses
/header -- Supply your own custom header
header-obj -- The header to use (Type: object)
send [email protected] $1000.00
2.3精化
copy/part (copy just part of a string)
find/tail (return the tail of the match)
load/markup (return XML/HTML tags and strings)
find/case/tail (match case and return tail)
insert/only/dup (insert entire block multiple times)
string: "no time like the present"
print copy string
no time like the present
print copy/part string 7
no time
help copy
USAGE:
COPY value /part range /deep
DESCRIPTION:
Returns a copy of a value.
COPY is an action value.
ARGUMENTS:
value -- Usually a series (Type: series port bitset)
REFINEMENTS:
/part -- Limits to a given length or position.
range -- (Type: number series port)
/deep -- Also copies series values within the block.
str: "test"
insert/dup/part str "this one" 4 5
print str
this this this this test
str: "test"
insert/part/dup str "this one" 4 5
print str
thisthisthisthisthistest