instance methods

[Stefan Nussbaumer-3]

sorry, probably i'm missing something ...

i have this class-definition:

Test {

    someTest { arg in; ^in*5 }

}

after having recompiled i'm trying to execute this:

10.someTest.postln

shouldn't that post 50? i'm just getting an error: ERROR: Message
'somTest' not understood (and some other lines ...).


i've read through the writing classes help and i've written a couple of
class methods that work the way they are supposed to. what am i missing
about instance methods?

thanks for any help

stefan
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[Josh Parmenter]

But, 10 isn't an instance of Test... you would need to do:

a = Test.new;
a.someTest(10);

Josh

On May 12, 2008, at 9:33 AM, Stefan Nussbaumer wrote:

> sorry, probably i'm missing something ...
>
> i have this class-definition:
>
> Test {
>
>    someTest { arg in; ^in*5 }
>
> }
>
> after having recompiled i'm trying to execute this:
>
> 10.someTest.postln
>
> shouldn't that post 50? i'm just getting an error: ERROR: Message
> 'somTest' not understood (and some other lines ...).
>
>
> i've read through the writing classes help and i've written a couple  
> of
> class methods that work the way they are supposed to. what am i  
> missing
> about instance methods?
>
> thanks for any help
>
> stefan
> _______________________________________________
> sc-users mailing list
> sc-users@...
> http://lists.create.ucsb.edu/mailman/listinfo/sc-users

******************************************
/* Joshua D. Parmenter
http://www.realizedsound.net/josh/

“Every composer – at all times and in all cases – gives his own  
interpretation of how modern society is structured: whether actively  
or passively, consciously or unconsciously, he makes choices in this  
regard. He may be conservative or he may subject himself to continual  
renewal; or he may strive for a revolutionary, historical or social  
palingenesis." - Luigi Nono
*/

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[Eirik Blekesaune]

Hi Stefan,

If you create the method definition like this:

Test {
        *someTest {arg in; ^in*5}
}

you've created a classmethod which you can run with:
Test.someTest(10) //returns 50


If you want to use an instance method you need to create an instance  
of Test:
a = Test.new; //create an instance of Test

Then you can use the method for that object:
a.someTest(10) //returns 50


The reason that the example you posted doesn't work is that the number  
10 is in fact an instance of Integer ( 10.class.postln ), not an  
instance of Test. This gives you access to Integers method, and the  
methods of Integers superclasses.

-Eirik




Den 12. mai. 2008 kl. 18.33 skrev Stefan Nussbaumer:

> sorry, probably i'm missing something ...
>
> i have this class-definition:
>
> Test {
>
>    someTest { arg in; ^in*5 }
>
> }
>
> after having recompiled i'm trying to execute this:
>
> 10.someTest.postln
>
> shouldn't that post 50? i'm just getting an error: ERROR: Message
> 'somTest' not understood (and some other lines ...).
>
>
> i've read through the writing classes help and i've written a couple  
> of
> class methods that work the way they are supposed to. what am i  
> missing
> about instance methods?
>
> thanks for any help
>
> stefan
> _______________________________________________
> sc-users mailing list
> sc-users@...
> http://lists.create.ucsb.edu/mailman/listinfo/sc-users

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[Stefan Nussbaumer-3]

Josh Parmenter schrieb:
> But, 10 isn't an instance of Test... you would need to do:
>
> a = Test.new;
> a.someTest(10);

stupid me, of course ... sorry. spring has let my braincells go for a
walk ...

much rather i'm interested how and if i can pass in an array into a
function (a method). currently i'm doing something like this:

*myMethod { arg min, max;
    ...
}

which let's me operate on a consecutive range of numbers.
instead of a range i'd like to pass in an array like  [ 34, 35, 39, 42 ]

would there be an easy way of doing this?

thanks, stefan

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[Josh Parmenter]

Ah... spring. It may show up here in Seattle soon.

Not sure what you mean... you can already pass in the array if you  
want...

if myMethod is:

        *myMethod {arg in;
                ^in * 5;
        }

Then

a = Test.myMethod(10); // should work
a = Test.myMethod([0, 1, 2, 3, 4]); // should also work.

Or - do you want the method to do something different with the input?  
Or make the input flexible to take multiple values???

        *myMethod {arg ... in; // in will always be an array... no matter how  
many elements you pass in
                ^[in.minItem, in.maxItem]
                }

Then:

a = Test.myMethod(10); // should return [10, 10]
a = Test.myMethod(10, 12, 4, 56, 102); // should return [4, 102]

Hope that help.

Josh

On May 12, 2008, at 10:03 AM, Stefan Nussbaumer wrote:

> Josh Parmenter schrieb:
>> But, 10 isn't an instance of Test... you would need to do:
>>
>> a = Test.new;
>> a.someTest(10);
>
> stupid me, of course ... sorry. spring has let my braincells go for a
> walk ...
>
> much rather i'm interested how and if i can pass in an array into a
> function (a method). currently i'm doing something like this:
>
> *myMethod { arg min, max;
>    ...
> }
>
> which let's me operate on a consecutive range of numbers.
> instead of a range i'd like to pass in an array like  [ 34, 35, 39,  
> 42 ]
>
> would there be an easy way of doing this?
>
> thanks, stefan
>
> _______________________________________________
> sc-users mailing list
> sc-users@...
> http://lists.create.ucsb.edu/mailman/listinfo/sc-users

******************************************
/* Joshua D. Parmenter
http://www.realizedsound.net/josh/

“Every composer – at all times and in all cases – gives his own  
interpretation of how modern society is structured: whether actively  
or passively, consciously or unconsciously, he makes choices in this  
regard. He may be conservative or he may subject himself to continual  
renewal; or he may strive for a revolutionary, historical or social  
palingenesis." - Luigi Nono
*/

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[Stefan Nussbaumer-3]

Josh Parmenter schrieb:

> ...
>
> a = Test.myMethod(10); // should work
> a = Test.myMethod([0, 1, 2, 3, 4]); // should also work.
>
> Or - do you want the method to do something different with the input?  
> Or make the input flexible to take multiple values???
>
> *myMethod {arg ... in; // in will always be an array... no matter how  
> many elements you pass in
> ^[in.minItem, in.maxItem]
> }
>
> Then:
>
> a = Test.myMethod(10); // should return [10, 10]
> a = Test.myMethod(10, 12, 4, 56, 102); // should return [4, 102]
>
> Hope that help.
>  

that help a lot :) thanks for clarification ... i've always been
confused about this

i've broken my function down to this now. i want to sort out
"characterists" of numbers - say, i'm dividing it by itsself to one and
any time a whole-numbered result is returned i'll add it to my
output-array (i have to cheat a little bit as i don't want to have empty
arrays in my result, so i just add 1 to the original value and let
function work on it again ... until i have the number of slots in my
output array:

    *divFunc { arg val, list, limit, inList, secondrun=false, pat=nil;
            var temp, outList, lim, max, min, orig;
            if(secondrun == false, { orig = list }, { orig = pat });
//            [list, inList].postln;
            max = list.maxItem;
//            max.postln;
            min = list.minItem;
            if(limit.notNil, {
                if(list.size < limit, { lim = list.size }, { lim = limit });
            });
//            limit.postln;
            if(inList.isNil, { outList = Array() }, { outList = inList });
            val.isPrime.if{val = val + 1};
            val.do{ |i| if(list.includes(i), {
                temp = val/i;
                if(temp.mod(1) == 0 and:{ outList.includes(i).not }
and:{ orig.includes(i) }, { outList = outList.add(i) });
            })};
            if(limit.notNil and:{ outList.size < lim }, {
//                "case 1".postln;
                ^this.divFuncArr(val+1, list, lim, outList, true, orig)
            }, {
//                "case 2".postln;
                ^outList.sort
            });
    }


should work:

Test.divFunc(23187, [4, 7, 17, 18], 3) // given you name the class
"Test" and the number to operate on isn't too high ...

good way to go or can this be optimized?


thanks a lot again (and hope, spring is going to arrive in seattle soon)

stefan
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