From: Mike Gold <mike.gold.4433@...>
Date: 2009-01-12T10:02:13+09:00
Subject: Re: functional programming

Joel VanderWerf wrote:
> Mike Gold wrote:
>>   data = [[1,2,3], [4,5,6,7]]
>> On this example alone, I think my characterization of "quite profound" 
>> is justified.
> 
> Why isn't this the ruby candidate for comparison:
> 
> mean = lambda { |ary|
>    (ary.inject { |acc, x| acc + x })/ary.size.to_f
> }
> data.map(&mean) # => [2.0, 5.5]

Sure, you can solve a different problem than the one I gave.
But the original problem remains.  We cannot, in general, modify
'mean'.

Do you propose to change every method in the ruby standard library
to take just one argument--an array?  That would work.  Sounds like
Lisp.
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