From: Lionel Thiry <lthiryidontwantspams@...>
Date: 2005-08-29T23:46:22+09:00
Subject: Re: Calling object method from variable

Frodo Larik a �crit :
> Hi all,
> 
> I have two questions regarding object methods
> 
> 1. Is it possible to call a method from a variable?
> Something like this:
> 
> i_am_just_a_var = 'this_is_the_real_method'
> o = Object.new
> o.#{i_am_just_a_var} = 'some thing I want'

 var_method = YourClass.instance_method(:real_method)
 o = YourClass.new
 var_method.bind(o).call

or

 o = YourClass.new
 var_method = o.method(:real_method)
 var_method.call

also

 o = YourClass.new
 var_method = o.method(:real_method=)
 var_method.call 'some thing I want'

Please note: do not write var_method.call='some thing I want', you'll
get an error.

> 
> 
> 
> 2. What is the best way to check for a method of an object?
> 
> After playing around in irb I came up with this:
> 
> o = Object.new
> if ( o.methods.grep(/^some_method_name$/ )
>    # do stuff
> else
>    # do something else
> end
> 
> 
> Sincerely,
> 
> Frodo Larik


-- 
Lionel Thiry

Personal web site: http://users.skynet.be/lthiry/