What to use binding for?

Ruby
1

Hi everyone,

There was a post a couple of days ago that included a call to binding

I was interested in this and went to look up the binding docs. All
good, it
seems simple enough, but I can’t think of how to use it.

Could anyone provide a simple explaination/code of an example of how it
might be used.

Thanx

Daniel

2

Daniel N wrote:

Hi everyone,

There was a post a couple of days ago that included a call to binding

I was interested in this and went to look up the binding docs. All good, it
seems simple enough, but I can’t think of how to use it.

Could anyone provide a simple explaination/code of an example of how it
might be used.

Google say:

http://extensions.rubyforge.org/rdoc/classes/Binding.html
http://groups.google.com/group/comp.lang.ruby/browse_frm/thread/1d08d0cdb3b53d11

http://onestepback.org/index.cgi/Tech/Ruby/RubyBindings.rdoc/style/print

3

Gene T. wrote:

might be used.

Google say:

http://extensions.rubyforge.org/rdoc/classes/Binding.html
http://groups.google.com/group/comp.lang.ruby/browse_frm/thread/1d08d0cdb3b53d11

http://onestepback.org/index.cgi/Tech/Ruby/RubyBindings.rdoc/style/print

Looking at Jim W.'s article on writing a local variable swap method
using binding, I couldn’t help but think that the following would reduce
code size, complexity, and call keystrokes in the final embodiment of
the method:

def swap(a, b, bind)
eval “#{a}, #{b} = #{b}, #{a}”, bind
end

a = Object.new #=> #Object:0x2c64540
b = Object.new #=> #Object:0x2c617c8

swap(:a, :b, binding)

a #=> #Object:0x2c617c8
b #=> #Object:0x2c64540

Not that I have any delusions about this pedagogical method having any
relevance in the real world, but there it is just the same.

Tom

4

On 7/28/06, Tom W. [email protected] wrote:

seems simple enough, but I can’t think of how to use it.

end
a = Object.new #=> #Object:0x2c64540
Tom

–
Tom W.
Helmets to Hardhats
Software Developer
[email protected]
www.helmetstohardhats.org

Thanx guys. This has helped me see how to use binding. Although I’m
still not sure when to use it :slight_smile: