From: Love U Ruby <lists@...>
Date: 2013-03-11T19:05:11+09:00
Subject: Re: Confusion with block local variable declaration with block variable declaration within the pipe

Joel Pearson wrote in post #1101045:
> You're looking for "Inject"
> http://ruby-doc.org/core-2.0/Enumerable.html#method-i-inject

No, please look at the symbol `;`, which is used to declare block local 
variables with the block parameters inside the `|`.


>> [1,2,3].each {}
=> [1, 2, 3]
>> [1,2,3].each {|x;y| print y}
=> [1, 2, 3]
>> [1,2,3].each {|x;y| y=x; print y}
123=> [1, 2, 3]

See above. Here `x` is block parameter and `y` is local variable to the 
block. The only problem if you try to get that `y` to initialize in the 
same place inside the `|`. - Why so?

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