From: Ahmed Abdelsalam <ahmed@...>
Date: 2009-04-23T01:35:03+09:00
Subject: Re: JRuby problem

Ahmed Abdelsalam wrote:
> James Herdman wrote:
>> My guess is that the context fails to keep track of local variables. Try 
>> an
>> experiment with something simpler:
>> 
>> ScriptContext sct = jruby.getContext
>> jruby.eval("name = 'Ahmed'")
>> jruby.eval('puts "My name is #{name}"')
>> 
>> If things explode, my theory is correct.
>> 
>> James
>> 
>> PS: Semi-colons aren't required, nor are empty parenthesis. It's 
>> considered
>> out of the Ruby norm to use them. As such, I'd avoid them in your 
>> coding.
>> See http://www.pathf.com/blogs/ruby-and-rails-style-guide/
> 
> Thanks for response. the code you sent is missing using sct, but I 
> updated it:
> ScriptContext sct = jruby.getContext();
>         jruby.eval("name = 'Ahmed'", sct);
>         jruby.eval("puts \"My name is #{name}\"", sct);
> 
> also not working, the same error: undefined local variable or method 
> `name' for main:Object
> 
> PS: Semi-colon is required by java code

I found a solution for the problem, it's a discussed bug:
Take a look: markmail.org/message/ze4vwkscc6w3cpc7
and http://jira.codehaus.org/browse/JRUBY-371

A temporary solution is to add $ before variable name so that it's seen 
in the same context with successive eval commands

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