[PD] [change] bug?

[Jonathan Wilkes]

On 09/23/2013 07:55 PM, Mario Mey wrote:
> Thanks for answering!
>
> Who is the OP?

The Original Poster. :)

-Jonathan

> Me? Well, if it is me... yes, I would like to have NULL as init value. 
> But, I understand that [change] must work like it works right now. 
> It's OK.
>
> I use "I go bananas" patch to make it work (with [+ 1]). Then, I read 
> Jonathan's reply... that has the same fix (with [* -1]).
>
> Thanks everyone.
>
>
>
>
>
> El 23/09/13 15:45, Jonathan Wilkes escribió:
>>
>>
>>
>> ________________________________
>>> From: Alexandre Torres Porres <porres at gmail.com>
>>> To: Mario Mey <mariomey at gmail.com>
>>> Cc: pd-list <pd-list at iem.at>
>>> Sent: Monday, September 23, 2013 12:13 PM
>>> Subject: Re: [PD] [change] bug?
>>
>>
>>> that's the way it works alright.
>>
>> Yes.  It's helpful to know that in Pure Data, an object that takes an 
>> optional float argument
>> typically sets the value to zero if the user doesn't provide an 
>> argument.
>>
>> It's not a requirement: an external author can set the default value 
>> to anything they want.
>> It's just that doing that requires extra work (i.e., manually 
>> checking the arguments), whereas
>> defaulting to zero happens automatically.
>>
>> Anyway, I think the OP might want [change] to default to NULL-- that 
>> is, let the next incoming
>> value pass no matter what because there isn't a previous value yet.  
>> That could be handy.
>>
>> You can make your own version of that by first sending a copy of the 
>> incoming value through a
>> spigot:
>>
>> [spigot 1]
>> |
>> [* -1]
>> |
>> [set $1(
>> |
>> [change]
>>
>> Then set the right inlet of [spigot] to zero and send the incoming 
>> value to your [change]
>> object, and it will be guaranteed to pass.
>>
>> -Jonathan
>>
>>> If your first value sent to it is zero, just initialize it with some 
>>> other value as the argument
>>> cheers
>>
>>
>>>> 2013/9/23 Mario Mey <mariomey at gmail.com>
>>>> If i create [change] and send it a [0(, it outputs nothing. It 
>>>> seems like it has already the 0 value initiated.
>>>>
>>>> I think [change] should not work like this...
>>>>
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