Jarmo Pertman wrote in post #984005:
> When analyzing the differences between Scala and Ruby in that concrete
> example then i can see that Scala "wins" by automatically initializing
> local variable "_" in the context of "block".

Setting _ with block arguments is pretty ugly, especially if the block 
takes multiple arguments (you'd get an array). It's like Perl's $_ which 
Ruby unfortunately inherits for gets.

Your instance_eval solution changes the object context; code in your 
block would not be able to use instance variables or methods of the 
object to which the enclosing method belongs, which would be a major 
stumbling block for anything other than the simple cases you give.

If you want to make the code shorter than scala, you could always alias 
:s :select

:-)

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