From: Robert Klemme <shortcutter@...>
Date: 2010-08-20T20:37:38+09:00
Subject: Re: function call using reflection

2010/8/20 Rajarshi Chakravarty <raj_plays@yahoo.com>:
> Hi,
> I get each part of the following command in a string at runtime
> Mod1::Util.parser1("log.txt")
>
> So I have the following strings:
> s1 = "Mod1"
> s2 = "Util"
> s3 = "parser1"
> s4 = "log.txt"
>
> Now I want to prepare the command and execute it at runtime.
>
> Object::const_get(s1 + "::" + s2 + "." + s3 + "(\"" + s4 + "\")")
> does not work.

const_get will only resolve a constant (as the name indicates).  You
could either use eval instead but I recommend the more robust and
secure version with const_get and send.

Object::const_get(s1).const_get(s2).send(s3, s4)

Cheers

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/