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comp.lang.ruby

Re: Dynamically referencing class constants?

Chris Carter

6/14/2007 1:24:00 AM

On 6/13/07, list. rb <list.rb@gmail.com> wrote:
> How can I do this?
>
> Socket.constants.each {|i|
> puts Socket::#{i} ##does not work of course
> }
>
>
> #################################
> Futile attempts:
>
> irb(main):023:0> puts Socket::SEEK_CUR ##works of course, the rest does
> not
> 1
> irb(main):029:0> puts Socket.new.SEEK_CUR
> ArgumentError: wrong number of arguments (0 for 3)
> from (irb):29:in `initialize'
> from (irb):29:in `new'
> from (irb):29
> irb(main):030:0> x = "SEEK_CUR"
> => "SEEK_CUR"
> irb(main):031:0> Socket::#{x}
> irb(main):032:0*
> irb(main):033:0* end
> NoMethodError: undefined method `end' for Socket:Class
> from (irb):33
> irb(main):034:0> Socket::send("SEEK_CUR")
> NoMethodError: undefined method `SEEK_CUR' for Socket:Class
> from (irb):34:in `send'
> from (irb):34
>

Socket.const_get("SEEK_CUR")

--
Chris Carter
concentrationstudios.com
brynmawrcs.com