Re: Io N00B - basic questions

> Le Tue, 21 Apr 2009 10:47:12 -0700,
> HowardP <how2paut@...> s'exprima ainsi:
>
>> Thanks Jeremy - yes this is helpful.
>>
>>> Consider:
>>> foo ::= 42
>>> Creates a slot called "foo" with the value 42, and creates a  
>>> "setFoo"
>> which takes a single argument, the value to update the "foo" slot  
>> with.
>>
>> Then is a 'setWhatever' like a property encapsulation?  In other  
>> words, if I
>> use the " *::= *" operator/message, I *must* then use it for  
>> subsequent
>> access to the 'foo' (or 'Whatever') slot?  Or is " ::= " just  
>> allowing
>> access to more of what goes on under the hood, that is " *:= "  
>> hides* the
>> setWhatever, whereas "::=" bubbles it up so to speak?
>>
>> If I'm not totally off here, does that then mean then I'd have to use
>>
>> setFoo := 99   to get foo to be 99 - and that
>>
>> foo:=99  would be something else / or raise an exception?
>>
>> ( I'll test this of course, but thought it would be good to post  
>> the info
>> anyway, as several of my programming pals are also fuzzy on this  
>> too. )
>
> Io> x := Object clone
> ==>  Object_0x9d7df60:
>
> Io> x a ::= 1
> ==> 1
> Io> x
> ==>  Object_0x9d7df60:
>  a                = 1
>  setA             = method(...)
>
> Io> x setA(2)
> ==>  Object_0x9d7df60:
>  a                = 2
>  setA             = method(...)
>
> Io> x a = 3
> ==> 3
> Io> x
> ==>  Object_0x9d7df60:
>  a                = 3
>  setA             = method(...)
>
> Io> x a := 4
> ==> 4
> Io> x
> ==>  Object_0x9d7df60:
>  a                = 4
>  setA             = method(...)
>
>
> While I wouldn't guess about the intention of Io developpers, I  
> personly consider '::=' as a nicety that also sets a setter.
> set* does not build a kind of property. Note:
>
> Io> x m ::= method("m running")
> ==> m running
> Io> x
> ==>  Object_0x9d7df60:
>  a                = 4
>  m                = method(...)
>  setA             = method(...)
>  setM             = method(...)
>
>
> Denis
> ------
> la vita e estrany
>
>
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