From: "Bashar A. Asad" <baasad@...>
Date: 2001-12-27T20:35:23+09:00
Subject: [ruby-talk:29469] Re: imageMagick

hi,
thanks for the reply I tried it without #{} thingy and this is what came up 
with
dir = "."

def no_ext(n)
  n.sub(/\.gif/,'')
end

  
def createThumbFile(f)
  img = Magick::Image.new(f)
  img.scale('60%')
  n = no_ext(f) 
  img.write("filename"=>f+"thumb.gif")
end

Dir.foreach(dir){|file|
  createThumbFile(file)
}
and didn't work, the error message below
-----------------------------------------------------------------
/usr/lib/ruby/1.6/magick.rb:63: warning: Unable to open file: . (330)
/usr/lib/ruby/1.6/magick.rb:31:in `initialize': no implicit conversion from 
boolean (TypeError)
        from /usr/lib/ruby/1.6/magick.rb:31:in `new'
        from /usr/lib/ruby/1.6/magick.rb:31:in `parse_image_geometry'
        from /usr/lib/ruby/1.6/magick.rb:192:in `scale'
        from ./resize.rb:15:in `createThumbFile'
        from ./resize.rb:21
        from ./resize.rb:20:in `foreach'
        from ./resize.rb:20


On Thursday 27 December 2001 06:24, you wrote:
> Hello --
>
> On Thu, 27 Dec 2001, Bashar A. Asad wrote:
> > hello again,
> > I tried to write the script that will read img file and create thumbs
> > from the dir, and this is what I came up with but its not working, it
> > spells out a parse error on n = no_ext(#{f}), what am I doing wrong?
>
> Well, you've started a comment at a very strange place :-)
>
> I think you mean:
>
>   no_ext(f)
>
> don't you?
>
> Also:
> > require "magick"
> >
> > dir = "."
> >
> > def no_ext(n)
> >   r="#{n}"
>
> Why not just:  r = n
>
> >   r.sub(/\.gif/,'')
>
> If that's all that r exists for, then you could do just:
>
>   def no_ext(n)
>     n.sub(/\.gif$/, '')
>   end
>
> which won't do any damage to n.
>
> > end
> >
> >
> > def createThumbFile(f)
> >   img = Magick::Image.new(#{f})
>
> Here, again, #{f} isn't what you mean:
>
>    img = Magick::Image.new(f)
>
> >   img.scale('60%')
> >   n = no_ext(#{f})
> >   img.write("filename"=>"#{n}_thumb.gif")
> > end
> >
> > Dir.foreach(dir){|file|
> >   createThumbFile("file")
> > }
>
> "file" (in quotation marks) isn't going to give you the name of the
> file -- it's going to give you the word "file" every time.
>
>
> David