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Subject: sc-users-digest V1 #108
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sc-users-digest        Saturday, April 15 2000        Volume 01 : Number 108




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Date: Tue, 11 Apr 2000 11:29:43 +0000
From: julian rhrhbr <---@---.--->
Subject: Re: iteration question extra

thanks, that is a good explanation.
So it makes most of the difference to change the collection itself or the
values it points to.(if there is no change in the datatypes).

James McCartney wrote:


> However in either example what you are doing looks OK since wrapAt will
> insure that you never index out of bounds. The problems come when you are
> trying to do something like remove items from a list and you remove them
> from the list you are iterating over. In this case you should return a new
> list without those items. If you use the Collection 'reject' method, then
> that is what it does.

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Date: Wed, 12 Apr 2000 20:33:21 -0700
From: cramakrishnan@acm.org
Subject: Function semantics

Hi James.  A question concerning functions in SC.

Executing:
(
var soundGen;
soundGen = SinOsc.ar(200);
{soundGen.postln
}.value
)

returns: a SinOsc

but when I try to play the function:
(
var soundGen;
soundGen = SinOsc.ar(200);
{soundGen
}.play
)

there are no UGens in the synth it it makes a very high pitched sound.

On the other hand, when I move the var declaration and assignment into
the function, it plays fine:
(
{
var soundGen;
soundGen = SinOsc.ar(200);
soundGen
}.play
)

Why does it behave this way?

- - sekhar

- --
C. Ramakrishnan        cramakrishnan@acm.org

------------------------------

Date: Wed, 12 Apr 2000 23:35:55 -0500
From: James McCartney <---@---.--->
Subject: Re: Function semantics

on 4/12/00 10:33 PM, cramakrishnan@acm.org at cramakrishnan@acm.org wrote:

> 
> Hi James.  A question concerning functions in SC.
> 
> Executing:
> (
> var soundGen;
> soundGen = SinOsc.ar(200);
> {soundGen.postln
> }.value
> )
> 
> returns: a SinOsc
> 
> but when I try to play the function:
> (
> var soundGen;
> soundGen = SinOsc.ar(200);
> {soundGen
> }.play
> )
> 
> there are no UGens in the synth it it makes a very high pitched sound.
> 
> On the other hand, when I move the var declaration and assignment into
> the function, it plays fine:
> (
> {
> var soundGen;
> soundGen = SinOsc.ar(200);
> soundGen
> }.play
> )
> 
> Why does it behave this way?
> 
> - sekhar
> 
> --
> C. Ramakrishnan        cramakrishnan@acm.org
> 

In order to be installed in a Synth a UGen has to be created by the Synth.
func.play is really executing Synth.new(func).play
The Synth in its 'new' method collects all of the UGens being created. If
you create a UGen outside of the ugenGraph function, then it is not
installed in a Synth and does not get executed.



- --- james mccartney   james@audiosynth.com   <http://www.audiosynth.com>
SuperCollider - a real time synthesis programming language for the PowerMac.
<ftp://www.audiosynth.com/pub/updates/SC2.2.7.sea.hqx>

------------------------------

Date: Sat, 15 Apr 2000 22:49:48 -0400 (EDT)
From: Paul Lansky <---@---.--->
Subject: array question

Hi,
Sorry for the dumb question, but I'm beating my head against
it and need help

I have a two dimensional array, e.g.

x = [[3,6,9],[8,2],[1,2,3,4]];

and want to create a second array which individually indexes
each element in the first array, e.g.

y = [[0,0],[0,1],[0,2],[1,0],[1,1],[2,0],[2,1],[2,2],[2,3]];

the following fails because it keeps the innter arrays intact.

y = Array.fill(x.size, {arg a; Array.fill(x.at(a).size,{arg b; [a,b]})});

yields
[[[0,0],[0,1],[0,2]],[[1,0],[1,1]],[[2,0],[2,1],[2,2],[2,3]]]

I'm sure the solution is obvious, but I'm too old and stoopid...

thanks

paul lansky

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End of sc-users-digest V1 #108
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