August 2008 - chuck-users - lists.cs.princeton.edu

.size() fails to properly instantiate objects
by Kassen 10 Aug '08

10 Aug '08

Fellow ChucKists, Below you'll find some example code proving that extending a array of instances of a home-made class using ".size()"doesn't properly instantiates the new objects, leading to nullpointers and the shred being dropped. The "<<" operator, using "new" does lead to proper instantiation. I feel this is a bug. Yours, Kas. =====================8<============================== //instantiate a array of home made classes foo bar[1]; //check that this works <<<"your lucky number is ", bar[0].value>>>; //grow by one. bar << new foo ; //make sure it's instantiated <<<"your lucky number is ", bar[1].value>>>; //grow by a another one bar.size(bar.size() + 1); //make sure we did, size should now be 3 <<<"size is now", bar.size()>>>; //try to verify this is instantiated, it won't be <<<"your unlucky number is ", bar[2].value>>>; class foo { Std.rand2(0, 10) => int value; } ===================================================

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pass arguments without the pesky colons
by N. Cameron Britt 10 Aug '08

10 Aug '08

Don't know if this is useful to anyone, but here's a little Perl script that allows you to pass arguments to Chuck separated by spaces rather than colons. Run this and let Perl run Chuck for you with properly formatted arguments. Should be in the same directory as the Chuck file you're trying to run. #!/usr/bin/perl my $args = join(":", @ARGV); $cmd = "chuck YOUR_CHUCK_FILE.ck" . ":$args"; #print "$cmd\n"; exec($cmd); Run with a command something like this: ./arg.pl arg1 arg2 arg3 etc I could imagine something like this being expanded into some sort of on the fly programming front end, to pass arrays of pitches for example.

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me.numArgs() broken?
by N. Cameron Britt 06 Aug '08

06 Aug '08

Is me.numArgs() broken? This code taken from the concurency/shreds page of language specification: // print out all arguments for( int i; i < me.numArgs(); i++ ) <<< me.arg( i ) >>>; returns this error: "class 'Shred' has no member 'numArgs'"

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Re: [chuck-users] [chuck] updates and clarifications
by Kassen 04 Aug '08

04 Aug '08

2008/8/4 Ge Wang <ge(a)ccrma.stanford.edu> > Greetings all, Hey, Ge! > Please feel free to write me, or continue this discussion on [chuck-users] and/or the forum. Cool, I will :¬) The "ChucK => MIR programming" workshop at the upcoming > ISMIR already has 40 registrants; The user base seems to be growing > steadily. > Sounds great! Will more info on this "MIR" concept be available for the geographically challenged as well? I'm becoming really interested in analysis of incoming signals (not just audio but also patterns and structures in other forms of realtime input like HID) but this is hard stuff and any help would -well- help. :¬) Yours, Kas.

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