q-lang-users

[q-lang-users] Q Question

[Larry G. <lg...@ac...>]

People:

I have downloaded Q, and am trying the following, using Qpad, but I get 
an error:

==> fac N = N*fac (N - 1) if N>0;
! Syntax error
 >>> fac N = N*fac (N - 1) if N>0;
                                           ^
I copied this from the qdoc.pdf.   This occurs using the interpreter, 
but I imagine it would be the same with the compiler.

Thanks,
Larry Gregg

Re: [q-lang-users] Q Question

[ww <wwa...@ea...>]

----- Original Message ----- 
From: "Larry Gregg" <lg...@ac...>
To: <q-l...@li...>
Sent: Tuesday, October 19, 2004 10:44 PM
Subject: [q-lang-users] Q Question


> People:
> 
> I have downloaded Q, and am trying the following, using Qpad, but I get 
> an error:
> 
> ==> fac N = N*fac (N - 1) if N>0;
> ! Syntax error
>  >>> fac N = N*fac (N - 1) if N>0;
>                                            ^
> I copied this from the qdoc.pdf.   This occurs using the interpreter, 
> but I imagine it would be the same with the compiler.
> 
> Thanks,
> Larry Gregg

Hi Larry,

I did a cut-n-paste of the offending line and my Qpad (ver 5.5)
session accepted it w/o an error report. To finish the definition 
you'll need to expand fac to;

fac 0 = 1;
fac N = N*fac (N - 1) if N>0;

Could the problem w/ your session be on the previous line?

Regards,

Walt

Re: [q-lang-users] Q Question

[<Dr....@t-...>]

> ==> fac N = N*fac (N - 1) if N>0;
> ! Syntax error
>  >>> fac N = N*fac (N - 1) if N>0;

You can't enter the script directly in the interpreter (which is just an 
expression evaluator). Enter it in the upper pane of Qpad, save the 
script, then run it. At the prompt, you can now enter something like fac 
100.

HTH
Albert

-- 
Dr. Albert Gr"af
Dept. of Music-Informatics, University of Mainz, Germany
Email:  Dr....@t-..., ag...@mu...
WWW:    http://www.musikwissenschaft.uni-mainz.de/~ag

Re: [q-lang-users] Q Question

[Larry G. <lg...@ac...>]

Albert Graef wrote:

>> ==> fac N = N*fac (N - 1) if N>0;
>> ! Syntax error
>>  >>> fac N = N*fac (N - 1) if N>0;
>
>
> You can't enter the script directly in the interpreter (which is just 
> an expression evaluator). Enter it in the upper pane of Qpad, save the 
> script, then run it. At the prompt, you can now enter something like 
> fac 100.
>
> HTH
> Albert
>
Thank you, Dr. Graef, that worked.  I thank you, too, Walt, for your 
help.  I am sure I will have more questions, so I hope you will not mind 
when I ask .

I've been an imperative language programmer for some time.   I thought I 
would stretch my mind, and try learning a functional programming 
language.  This started off badly, but it is looking better, now!

Larry

Re: [q-lang-users] Q Question

[<Dr....@t-...>]

Larry Gregg wrote:
> Thank you, Dr. Graef, that worked.  I thank you, too, Walt, for your 
> help.  I am sure I will have more questions, so I hope you will not mind 
> when I ask .

That's what this list is for. :)

Albert

-- 
Dr. Albert Gr"af
Dept. of Music-Informatics, University of Mainz, Germany
Email:  Dr....@t-..., ag...@mu...
WWW:    http://www.musikwissenschaft.uni-mainz.de/~ag