Re: [sc-users] out of scope variables when passing functions was: Re: [sc-users] SystemClock-schedAbs explodes when time arg not used?

[Charlls Quarra <charlls_quarra@xxxxxxxxxxxx>]

 Ok, i found this... solution? hack? workaround? who
cares?

instead of:

5.do{arg i; 
 SystemClock.schedAbs( thisThread.clock.seconds + i +
1.0 , {arg time; myA.dump( k ); nil } );
("but while i is "++i++" k is "++k).postln;
k = k + i;
}

do this:

5.do{arg i; 
  var val;
 val = k;
SystemClock.schedAbs( thisThread.clock.seconds + i +
1.0 , {arg time; myA.dump( val ); nil } );
("but while i is "++i++" k is "++k).postln;
k = k + i;
}

so the variable k gets asigned to a shorter-lived
scope and which keeps the desired value







 --- Charlls Quarra <charlls_quarra@xxxxxxxxxxxx>
escribió:

>  was: Re: [sc-users] SystemClock-schedAbs explodes
> when time arg not used?
> 
> 
>   --- James Harkins <jamshark70@xxxxxxxxx> escribió:
>  
>  > A function is aware of variables in all enclosing
>  > scopes, unless the 
>  > function defines a variable or argument having
> the
>  > same name as a 
>  > variable in a higher-level scope.
>  > 
>  > arg item ,i, at=i;
>  
>  This is a one or two weeks old thread, but
> tinkering
> with the SystemClock explode thread examples i could
> manage to come up with an example that truly
> reproduces the problem i was having (and is the true
> reason of the other thread)
> 
> look this:
> 
> MyClassA {
> 
> *new { 
>  ^super.new.init
> }
> 
> init {
> }
> 
> dump { | me |
> 
> (" great "++me).postln;
> }
> 
> }
> 
> MyClassB {
> 
> var <>myA;
> 
> *new { 
> ^super.new.init
> }
> 
> init {
> myA = MyClassA.new;
> }
> 
> play { 
> var k;
> k = 0;
> 5.do{arg i; 
>   
> SystemClock.schedAbs( thisThread.clock.seconds + i +
> 1.0 , {arg time; myA.dump( k ); nil } );
> ("but while i is "++i++" k is "++k).postln;
> k = k + i;
> }
> }
> 
> }
> 
> then;
> 
> a = MyClassB.new;
> a.play;
> 
> but while i is 0 k is 0
> but while i is 1 k is 0
> but while i is 2 k is 1
> but while i is 3 k is 3
> but while i is 4 k is 6
> a MyClassB
>  great 10
>  great 10
>  great 10
>  great 10
>  great 10
> 
> So i'm getting the value of k at the time of the
> execution of the scheduled function. What i want is
> to
> pass the value of k at the time of the _scheduling_,
> that is what i want *views to the heavens with a
> thanks gesture*
> 
> 
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