From: Daniel Sheppard <daniels@...>
Date: 2004-08-24T10:36:57+09:00
Subject: Re: *with* block?

If you're just after configuring the instance variables, you might go
for:

my_obj = boxWidget.new
my_obj.instance_eval do
  @x = 0
  @y = 10
  @width = 100
  @height = 100
end

Though doing so will make you code fairly fragile - setting variables in
this way will bypass the setters, so you can't customize your setting
actions. (I was suprised that instance_eval didn't actually grant the
ability to call methods on the object without prefixing them)

Something like this maybe?

class BoxWidget
  attr_accessor :x, :y, :width, :height
end

class Object
  def set_all(hash)
    hash.each { |k,v| send("#{k}=", v) }
  end
end

my_obj = BoxWidget.new
my_obj.set_all({
  :x => 10,
  :y => 10,
  :width => 100,
  :height => 100,
})

my_obj

=> #<BoxWidget:0x2caa6d0 @y=10, @x=10, @height=100, @width=100>

    

> -----Original Message-----
> From: Zach Dennis [mailto:zdennis@mktec.com] 
> Sent: Tuesday, 24 August 2004 11:09 AM
> To: ruby-talk ML
> Subject: *with* block?
> 
> I am looking for a structure like:
> 
> my_obj = boxWidget.new
> with my_obj do
>     x = 0
>     y = 10
>     width = 100
>     height = 100
> end
> 
> instead of having to say
> 
> my_obj = boxWidget.new
> my_obj.x = 0
> my_obj.y = 10
> my_obj.width = 100
> my_obj.height = 100
> 
> 
> 
> Can you do this already? If not....anyone support an RCR for 
> it besides me?
> 
> Zach
> 
> 
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