From: ara.t.howard@...
Date: 2006-08-03T06:38:22+09:00
Subject: Re: Can't convert String into Integer (TypeError)

On Thu, 3 Aug 2006, Timothy Hunter wrote:

> Okay, I'm stumped. I've been looking at this program off-and-on for 3 days 
> now and I can't understand why it's failing like it does. It's *supposed* to 
> fail, but not the way it does.
>
> The Image#dissolve method takes 2 arguments, an Image object and a 
> percentage. The percentage argument can be specified either as a number 
> between 0.0 and 1.0, or as a string in the form "NNN%", like "50%" for 
> example. In this test I'm passing "1x0%" as the percentage, which is clearly 
> incorrect. I expect dissolve to raise an ArgumentError exception with the 
> message "expected percentage, got `1x0%'". What actually happens is that I 
> get
>
> /Users/timothyhunter/Temporary/bug.rb:22:in `raise': can't convert String 
> into Integer (TypeError)
>       from /Users/timothyhunter/Temporary/bug.rb:22:in `dissolve'
>       from /Users/timothyhunter/Temporary/bug.rb:43
>
> Line 22 is the "raise" statement.
>
> What am I missing?

   jib:~ > ruby -r RMagick -e'  p Magick::Image.instance_methods.grep(/raise/)  '
   ["raise"]


btw, seems like you could get away with something like:

   pct = Float(pct) rescue (Float(pct.to_s.delete('%'))/100)
   r = 0.0 .. 1.0
   pct = [r.min, pct].max
   pct = [r.max, pct].min

cheers.

-a
-- 
we can never obtain peace in the outer world until we make peace with
ourselves.
- h.h. the 14th dali lama