From: James Coglan <jcoglan@...>
Date: 2009-06-01T17:46:18+09:00
Subject: Re: eval? instance_eval?? hmm

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2009/6/1 Steve Hull <p.witty@gmail.com>

> 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?



myObject.__send__(myMethodName, myHash) is a more appropriate idiom for what
you seem to be doing.

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