Hi, Hallvard,
There's more consistency that meets the eye, just not well
documented...
Hallvard Ystad wrote:
>
> Hi again
>
> OK, so I accept that RT wants all characters in tags to be
> accessible, so that <a href=""> and <a href = ""> are not
> alike. But how about this:
>
> >> print <a href="">
> <a href="">
> >> print join <a href=""> "^/"
> <a href=""
> >
> >>
>
> It seems JOIN <a href=""> "^/" puts in the linebreak too early.
>
Think of TAG! as a subtype of STRING! which uses < and > as its
delimiters instead of " and " or { and } .
Consider this console transcript, which makes it clear that the
corner-brackets are the syntax that identifies a tag, but are
not part of the tag's data content:
>> foo: <a href="">
== <a href="">
>> foreach item foo [print item]
a
h
r
e
f
=
"
"
Now let's try another example:
>> baz: join foo { border="0"}
== <a href="" border="0">
which shows that JOIN (as well as the other series operations,
including APPEND, etc.) will operate on the *data*content* of
the tag, which doesn't include the delimiters. I simply used
a printable string instead of the whitespace value of "^/" to
make the illustration more visible.
After all, if I wrote
foo: {a href=""}
and then evaluated
join foo "###"
you'd expect to get a result which would MOLD something like
{a href=""###}
instead of
{a href=""}###
wouldn't you?
>
> Or am I mistaken again? If I FORM or MOLD the TAG!, it seems
> to work fine...
>
But the effect of FORM or MOLD is to manufacture a STRING! value
from other data types. It just happens that the external format
for a TAG! value is always bracketed with the < and > to make it
clear that we're dealing with something other than a plain string.
HTH!
-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" ;
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