From: Pit Capitain <pit@...>
Date: 2003-02-12T17:53:47+09:00
Subject: Re: value of assignment (Re: Order of the value of an expression changed? (PR#579))

Hi Mathieu,

thanks for the code example.

> # if out-of-range, auto-adjusts percent to closest valid value
> def quality=percent
>   @percent = [[percent,0].max,100].min
> end
> 
> According to the old behaviour, this quite reasonable piece of code makes
> (o.quality=x)==o.quality always true, but according to the new behaviour,
> it's no longer the case.

Yes, this is true. I see your point. But, at least for me, after

  o.quality = 999'999

it feels strange that

  o.quality == 100

The auto-adjust code might be handy if you always know what you're 
doing, but it could also hide some errors in your program. I think if 
I'd want to auto-adjust instead of raising an error, I would code it 
like this:

  def adjust_to_percent( value )
    [[value,0].max,100].min
  end

  percent = o.quality = adjust_to_percent( 999'999 )

to make it obvious whats going on.

Regards,
Pit