From: Love U Ruby <lists@...>
Date: 2013-03-11T18:57:58+09:00
Subject: Confusion with block local variable declaration with block variable declaration within the pipe `|`

Why are we not allowed to create local variables or new object with
block variables?

The below are allowed :

a = "hello world".split(//).each{ |x;newstr = Array.new() | newstr =
x.capitalize;puts newstr }

H
E
L
L
O

W
O
R
L
D
=> ["h", "e", "l", "l", "o", " ", "w", "o", "r", "l", "d"]

and

[1,2,3].each {|num|temp =0 ; temp = num ; print temp}
#123=> [1, 2, 3]

For what reasons the below are not allowed?

[1,2,3].each {|num;temp =0| temp = num;print temp}

#SyntaxError: (irb):5: syntax error, unexpected '=', expecting '|'
#[1,2,3].each {|num;temp =0| temp = num;print}
                         ^
#(irb):5: syntax error, unexpected '}', expecting $end
#        from C:/Ruby193/bin/irb:12:in `<main>'

and

a = "hello world".split(//).each{ |x;newstr = Array.new() | newstr =
x.capitalize;puts newstr }

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