From: Mark Hahn <mchahn@...>
Date: 2001-11-30T10:16:06+09:00
Subject: [ruby-talk:27011] Re: Why use symbols (was: Can this be factored?)


Thanks.  I knew there had to be some other way to use them than just eval.

-----Original Message-----
From: Matt Armstrong [mailto:matt+dated+1007513886.2f1102@lickey.com]
Sent: Thursday, November 29, 2001 4:58 PM
To: ruby-talk ML; Mark Hahn
Cc: ruby-talk ML
Subject: [ruby-talk:27008] Re: Why use symbols (was: Can this be
factored?)


"Mark Hahn" <mchahn@facelink.com> writes:

> I've never processed symbols before.  If I have an object and a symbol of
an
> instance variable, do I have to use eval to access the value, or is there
a
> faster way?

Object#send

> def printSide obj, side
> 	puts eval("obj."+side.id2name)
> end
> printSide(node,:left)

Try:

    def printSide(obj, side)
        puts obs.send(side)
    end


--
matt