From: Jeremy Tregunna <jtregunna@...>
Date: 2006-10-05T23:50:26+09:00
Subject: Re: dynamically changing superclass/mixins


On 06-10-05, at 09:35, Trans wrote:

>> It doesn't look much like Ruby, granted, but it *does* tie in with  
>> the
>> rest of Io. Consider if/else:
>>
>>   if(cond, writeln("aye"), writeln("nay"))
>>
>> Being able to pass multiple 'blocks' to a method facilitates things
>> like the above, which aren't possible with Ruby's single-block
>> approach.
>
> I agree. Multiple blocks are nice, but it could be be done with a  
> block
> notation too if one wanted:
>
>    if(cond) {writeln("aye")} {writeln("nay")}
>
> Hmm... does Io support currying? Then:
>
>    if(cond)(writeln("aye"))(writeln("nay"))

No, Io doesn't support currying out of the box; we just don't empose  
an arity field on our methods/blocks. That is to say, you could  
define a method which takes 3 arguments, if you only supply 2, the  
last argument will receive "nil" as its value instead of a message  
expression.

However, many attempts have been made (successfully I might add) to  
add different levels of currying to Io. Asking on our mailing list is  
likely to get you one or two examples =]

--
Jeremy Tregunna
jtregunna@blurgle.ca