From: Morton Goldberg <m_goldberg@...>
Date: 2006-09-20T20:34:22+09:00
Subject: Re: Something strange in ruby or I'm a newbie?

On Sep 20, 2006, at 6:32 AM, Hussachai Puripunpinyo wrote:

> Question 1:
>
> #IS THIS A BUG
> class TestBug
>   def test
>     "Hello Bug"
>   end
> end
> class FoundBug < TestBug
>   def test
>     super +" ,I found you !" #Notice here
>   end
> end
> test = FoundBug.new()
> puts test.test
>
> It blame me that
>  "undefined method `+@' for " ,I found you !":String (NoMethodError)
> 	from C:/DOCUME~1/HUSSAC~1/LOCALS~1/Temp/rb1F.tmp:12"
> Why?
> This is bug or I miss something?
>
> If I replace the line in '#Notice here' to
>
> super+" ,I found you !" #With no space between super and my string
> #OR
> super + " ,I found you !" #With space both side of '+'
> #I found that no error
>
> Why?

No, I'm afraid it's a feature ;).  if you rewrite

>     super +" ,I found you !" #Notice here

to
>     super + " ,I found you !" #Notice space after '+'.

it will work. By leaving out the space, you have invoked the unary  
'+' operator. But, of course, you wanted the binary '+' operator. In  
Ruby there are times when spaces and parentheses are critical.

Regards, Morton