From: Love U Ruby <lists@...>
Date: 2013-03-26T15:54:48+09:00
Subject: Re: Need help on Kernel#eval

D. Deryl Downey wrote in post #1103183:
> Why? To what purpose? What exactly are you doing? What does this apply
> to? What exactly are you trying to do? Show us the code where this would
> matter to you.
>
> What *exactly* are you having trouble understanding? In what context did
> you run across this?


I have tried the below to understand the relationship between `eval` and 
`Binding` object,with local variable context.


C:\>irb --simple-prompt
>> def display
>> eval("puts str",b)
>> ^C
>> def display(b)
>> eval("puts str",b)
>> end
=> nil
>> str="hi"
=> "hi"
>> display(binding)
hi
=> nil
>> str = "hello"
=> "hello"
>> display(binding)
hello
=> nil
>> str = "good"
=> "good"
>> str="bad"
=> "bad"
>> display(binding)
bad
=> nil
>>

The above is understood. But didn't make such simple example to 
understand for **methods, value of self, and possibly an iterator block 
that can be accessed in this context are all retained**. Thus asked you 
like experts to give me such snippet to understand those inside the **.

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