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 Forum index » DIY Hardware and Software » ChucK programming language
<<< chuck >>>
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kijjaz



Joined: Sep 20, 2004
Posts: 765
Location: bangkok, thailand
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PostPosted: Tue Aug 29, 2006 4:17 pm    Post subject: <<< chuck >>>
Subject description: printing in chuck
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Code:
// what'd it print out? eh.. i'm confused with this one
<<< <<< <<<0>>>, <<<1>>> >>> , <<< <<<2>>>, <<<3>>> >>> >>>;


i'm using chuck 1.2.0.6 (dracula)
i've got this result:

Code:
0 :(int)
1 :(int)
0 1
2 :(int)
3 :(int)
2 3
2 3

i can't figure out how the last line 2 3 is computed from..
please help me out heheh.. Laughing

actually i was playing with <<< >>>
and wanna know what more we can do with it.

i guess there must be a lot of fun way we can play with printing.
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ge



Joined: Aug 13, 2006
Posts: 105
Location: Palo Alto, CA

PostPosted: Wed Aug 30, 2006 12:26 am    Post subject: Re: <<< chuck >>>
Subject description: printing in chuck
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Code:
// what'd it print out? eh.. i'm confused with this one
<<< <<< <<<0>>>, <<<1>>> >>> , <<< <<<2>>>, <<<3>>> >>> >>>;

Interesting usage! The reason this works is because it was designed to work "out of band", so you can more easily observe subexpressions.

Code:
// the expression
3 + foo * x => bar;

// print out foo * x and still evaluate
3 + <<< foo * x >>> => bar;

It is not completely neutral to the expression. It's possible to change the precedent of the evaluation. Anyway, this is the first time I've seen <<< >>> nested. Cool!

Once file I/O is in, there will be many more ways of printing and writing to file.
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Blue Hell
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Joined: Apr 03, 2004
Posts: 23500
Location: The Netherlands, Enschede
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PostPosted: Wed Aug 30, 2006 2:58 am    Post subject: Reply with quote  Mark this post and the followings unread

I had expected the last output lune would have been

0 1 2 3

instead of

2 3

_________________
Jan
also .. could someone please turn down the thermostat a bit.
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kijjaz



Joined: Sep 20, 2004
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PostPosted: Wed Aug 30, 2006 3:12 am    Post subject: Reply with quote  Mark this post and the followings unread

Embarassed Blue Hell: hello
yeah, that's what i thought also.
that's what i'm still figuring out. hehehe..


oh i'm back!
yeah, i've figured it out.
expression , expression returns the last expression

try <<< <<< 1, 2 >>> >>>;
my result:
1 2
2 :(int)

1, 2 => int k; <<< k >>>; returns the same kind of 2 as the above.
maybe this is how it works that way.
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Blue Hell
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Location: The Netherlands, Enschede
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PostPosted: Wed Aug 30, 2006 4:27 am    Post subject: Reply with quote  Mark this post and the followings unread

kijjaz wrote:

expression , expression returns the last expression


Well I thought that as well at some stage (and I think I read something about it in a manual or a tutorial), but in that case I would have expected the output to be :

0
1
1
2
3
3
3

_________________
Jan
also .. could someone please turn down the thermostat a bit.
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kijjaz



Joined: Sep 20, 2004
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PostPosted: Wed Aug 30, 2006 4:49 am    Post subject: Reply with quote  Mark this post and the followings unread

(i guess again:) but surely with an exception that
<<< ___ , ___ , ___ >>>; will print the list out
but the value returned after printing is the last expression.
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kijjaz



Joined: Sep 20, 2004
Posts: 765
Location: bangkok, thailand
Audio files: 4

PostPosted: Tue Sep 12, 2006 8:32 am    Post subject: Reply with quote  Mark this post and the followings unread

wow.. this works like this..
i'll try to figure this out also hahah.


code:
Code:
<<<
<<< <<< <<< "<<< >>>" >>> , <<< "<<< >>>" >>> >>> >>>,
<<< <<< <<< "<<< >>>" >>> , <<< "<<< >>>" >>> >>> >>>
>>>;


result:
Code:
​"<<< >>>" : (string)
"<<< >>>" : (string)
<<< >>> <<< >>>
"<<< >>>" : (string)
"<<< >>>" : (string)
"<<< >>>" : (string)
<<< >>> <<< >>>
"<<< >>>" : (string)
<<< >>> <<< >>>


... oh! it's the same case and same method.
i was confused lol.
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