From: Jason Nordwick <jason@...>
Date: 2006-09-09T02:15:29+09:00
Subject: Re: symbol tricks



Gavin Kistner wrote:
> From: Jason Nordwick [mailto:jason@adapt.com] 
>> Plus for arrays and strings is concatenation. I don't like it 
>> either, b/c array plus should be addition of corresponding 
>> elements, but that is the way things are.
> 
> That's seems oddly specific to me, but if you don't like it, change it:
> 

Wouldn't that break pretty much everything else that used + for concatenation?

-j

> a = [ 1, 2, 3 ]
> b = [ 4, 5, 6 ]
> p a+b
> #=> [1, 2, 3, 4, 5, 6]
> 
> class Array
>   def +( other )
>     self.zip( other ).map{ |e| e[0]+e[1] }
>   end
> end
> 

> p a+b
> #=> [5, 7, 9]
>