From: "Peña, Botp" <botp@...>
Date: 2007-07-04T13:55:51+09:00
Subject: block params scoping  (was ruby-talk 257917: RE: Using a block to surround a string?)

Fr David Black:
# Method definitions always have their own local scope, so a, b, and
# string are strictly local to the method.  Blocks pick up the scope
# that they're created in, and can also create variables that weren't
# already in that scope.  Those variables disappear when the block
# exits; the ones that were there already survive:
# 
#    x = 1
#    some_method { y = x + 1 }   # same x; new y
#    y                           # undefined; block's y didn't survive
#    x                           # same x

Hi David,

How about parameter variables, will its scoping change/stay in ruby2 ?

Currently,

irb(main):011:0> x="testing"
=> "testing"
irb(main):012:0> 5.times{|x|}
=> 5
irb(main):013:0> x
=> 4

i'd prefer

x = "testing"
some_method { |x| y = x + 1 }   # different x; overrides any x 
x                               # => "testing", same x outside

just asking for ruby englightenment
kind regards -botp