From: Austin McDonald <austin-mcdonald@...>
Date: 2004-06-12T16:02:33+09:00
Subject: Re: Any way to get the calling method's binding?

Excellent; I had the right idea, but yours is much cleaner.

For giggles, and maybe b/c it's a little more explicit, you could use 
Kernel#binding to make it obvious what's going on:

def trace(expr, b)
    LOG.debug "#{expr} = #{eval(expr, b)}"
end

def something()
    x=5
    y=7
    trace "x+y", binding
end

something # ==> x+y = 12

Although I like Joel's version better, I think this is a little clearer.

Austin



Joel VanderWerf wrote:

> Austin McDonald wrote:
>
>> In the meantime, you could do this:
>>
>> def trace (expr)
>>    LOG.debug "#{expr} = #{yield expr}"
>> end
>>
>> def something
>>    x=5
>>    x=7
>>    trace "x+y", {|n| eval n}
>> end
>>
>> something => 12
>
>
> def trace(&block)
>   expr = block.call
>   puts "#{expr} = #{eval(expr, block)}"
> end
>
> def something
>   x = 5
>   y = 7
>   trace {"x + y"}
> end
>
> something   # ==> x + y = 12
>
>
>