From: Steve Hull <p.witty@...>
Date: 2009-06-01T16:53:40+09:00
Subject: eval?  instance_eval??  hmm

Hey ruby wizards.  I got a question for you.  I want to call a method on
my object instance, with the method name specified by a string.  I want
to *pass in* a hash to my method.

I tried:

myMethodName = "doSomeStuff"
myObject.instance_eval "#{myMethodName}(#{myHash})"

But it complained that it didn't have a method named #{myHash.to_s}.

So I tried myObject.instance_eval { myMethodName(myHash) }

But it compalined that it didn't have a method named "myMethodName"
(which is obvious -- the method I wanted to call is doSomeStuff).

I'm new to metaprogramming in ruby.  What am I missing here?

Last thought:  I guess I could assign a transient local var
"@input_hash", then call the method which would use @input_hash instead
of requiring an input.  That just seems a little ugly though.  Any
prettier solution?

-Steve
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