[REBOL] Re: [subject: escape characters]
From: joel:neely:fedex at: 24-Feb-2002 7:31
Hi, Pat,
pat665 wrote:
> ... What I would like now is to populate a third column
> with a more symbolic notation. For now, I have got only
> three item for this column.
>
According to
http://www.rebol.com/docs/core23/rebolcore-16.html
in the section on "Strings":
You can include special characters and operations in strings
by prefixing them with a caret (^). Special characters include:
Special Characters
Character Definition
" Inserts a double quote (").
} Inserts a closing brace (}).
^ Inserts a caret (^).
/ Starts a new line.
(line) Starts a new line.
- Inserts a tab.
(tab) Inserts a tab.
(page) Starts a new page.
(letter) Inserts control-letter (A-Z).
(back) Erases one character left of the insertion point.
(null) Inserts a null character.
(escape) Inserts an escape character.
(xx) Inserts an ASCII character by hex (xx) number.
and in the section on "Other Values / Character":
Characters can include escape sequences that begin with a
caret (^) and are followed by one or more characters of
encoding. This encoding can include the characters #"^A"
to #"^Z" for control A to control Z (upper- and lower-case
are the same):
#"^A" #"^Z"
Following is a table of control characters that can be
used in REBOL.
Control Characters
Character Definition
#"(null)" or #"@" null (zero)
#"(line)", #"/" or, #"." end of line
#"(tab)" or #"-" horizontal tab
#"(page)" new page (and page eject)
#"(esc)" escape
#"(back)" backspace
#"(del)" delete
#"^" caret character
#"^"" quotation mark
#"(00)" to #"(FF)" hex forms of characters
The entries all (except #"^"") contain the typo that the
^ prefix is omitted.
Also, notice that ^(esc) works for both character and string
literals, while ^(escape) works only in strings.
-jn-
--
; sub REBOL {}; sub head ($) {@_[0]}
REBOL []
# despam: func [e] [replace replace/all e ":" "." "#" "@"]
; sub despam {my ($e) = @_; $e =~ tr/:#/.@/; return "\n$e"}
print head reverse despam "moc:xedef#yleen:leoj" ;
