[PD] (breaking symbols) was Re: find a list of numbers in a text file
Jonathan Wilkes
jancsika at yahoo.com
Sun Sep 4 04:47:46 CEST 2011
----- Original Message -----
> From: Mathieu Bouchard <matju at artengine.ca>
> To: Jonathan Wilkes <jancsika at yahoo.com>
> Cc: Chris McCormick <chris at mccormick.cx>; Miller Puckette <msp at ucsd.edu>; "pd-list at iem.at" <pd-list at iem.at>
> Sent: Saturday, September 3, 2011 1:20 PM
> Subject: Re: [PD] (breaking symbols) was Re: find a list of numbers in a text file
>
> On Wed, 31 Aug 2011, Jonathan Wilkes wrote:
>
>> Keep in mind that [list implode] must be smart enough to output the float
>> atom "12" given the input "49 50". If it gives you
> "symbol 12" then your
>> back to the [makefilename] madness from my original vanilla solution.
>
> It's not that simple.
It needs to be that simple for the general case because Pd Vanilla has no (sensible) mechanism to convert
a symbol atom into a float.
If symbol atoms which look like numbers to the naked eye are going to start flying around more freely in Pd
then the docs need to explain how atoms are a kind of weird file cabinet where the label on the cabinet tells
you which file-folder inside actually holds the data. So if you send the symbol-atom "15" to [max], the file clerk will
complain because it's looking for a number but the label on the cabinet says "A_SYMBOL". (Additionally, if you tell
the clerk to ignore the label and just pull out a number, the clerk will look in "A_FLOAT" and give you a "0", because
the "15" is in the "A_SYMBOL" file-folder.)
Hm... is there a way you can tell the clerk to be a real go-getter when looking for a float atom inside a
cabined labeled "A_SYMBOL" by just going ahead and seeing if the data in the "A_SYMBOL" file-folder looks like a
number, and if so convert it to a float and send it on its way?
Also, I'm assuming [list implode] would accept and process a list at the left inlet, unlike [s2l] (which passes the
1st element to the right inlet).
> People might not want always a cast to float, because
> then, it might destroy part of the information in the symbol.
>
> see :
> http://lists.puredata.info/pipermail/pd-list/2006-09/042419.html
>
> that's how [gf/s2l] is different : it outputs only symbols. I think I could
> make it an option, but I wouldn't know how to call it. E.g. :
>
> [gf/s2l /, docast]
> [gf/s2l /, convert]
> [gf/s2l /, atof]
>
> where the name after the comma is an attribute method taking one optional float
> arg defaulting to 1, just like all other flags in GF, defined like this :
>
> \attr bool docast;
>
> void cast_if_wanted (t_atom *foo) {if (docast) ........;}
>
> _______________________________________________________________________
> | Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC
>
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