[PD] Understanding Selectors, Atoms, Lists ...
fbar at footils.org
Wed Apr 19 13:11:37 CEST 2006
Sciss hat gesagt: // Sciss wrote:
> this may be related to a thread last week about the nature lists ?
> as a experienced max-user i'm having problems to understand the
> nature of PD atoms. there seems to be the possibility that an atom is
> neither a symbol, nor a number nor a list ? like in this patch some
> inputs leave [route] through the rightmost outlet:
Being the author of http://puredata.info/dev/PdMessages I would just
repeat myself here with text from there.
> there seems to be no logic whether one has can use a message "as
> such" and when one has to prepend the "symbol" selector. also there
> seems to be no logic whether an object outputs a list "as such" or
> with a prepended "list" selector ; like [pack] accepts a symbol
> without "symbol" in the left inlet, but not in the right inlet ; it
> will output a list prepended by "list" ; if i put this list into
> [zl], the list-prefix is stripped.
I consider this a bug of [zl]. With newer Pd's you should use [list]
instead for basic operations on lists. [list] *always* outputs a
list-message with list-selector for messages with more than one
element, except [list trim] which trims the selector.
> also, what kind of atom is this [alpha beta gamma( if not a list?
It's something Miller calls a "meta-message". The most common example
is the "set"-meta-message.
Frank Barknecht _ ______footils.org_ __goto10.org__
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