From: Robert Dober <robert.dober@...>
Date: 2006-09-20T21:04:36+09:00
Subject: Re: Something strange in ruby or I'm a newbie?

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On 9/20/06, Jan Svitok <jan.svitok@gmail.com> wrote:
>
> On 9/20/06, Morton Goldberg <m_goldberg@ameritech.net> wrote:
> > 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 =3D 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.
>
> In other words,
>
> super +"whatever" is the same as super(+"whatever") while
> super+"whatever" or super + "whatever" is the same as super(*args) +
> "whatever".


Impressive, well I kind of dislike it, there is a warning from ruby though

right?

Robert



--=20
Deux choses sont infinies : l'univers et la b=EAtise humaine ; en ce qui
concerne l'univers, je n'en ai pas acquis la certitude absolue.

- Albert Einstein

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