From: Shashank Date <sdate@...>
Date: 2004-04-14T13:04:14+09:00
Subject: New Local Variable Scope rule

In one of Matz's slides at RubyConf ,

(http://www.rubyist.net/~matz/slides/rc2003/mgp00012.html)

he mentions his New Local Variable Scope rule as follows:

#---------------------------------------------------------------
def foo
    a = nil
    ary.each do |b|
        # b is block local
        c = b
        a = b
        # a and c are local to the method
    end
    # a and c available here
end
#---------------------------------------------------------------

I was wondering what would happen if it was written as follows:

#---------------------------------------------------------------
def foo(&block)
    a=nil;
    ary.each(&block)
end;

foo(lambda {|b| a=b; c=b})
#---------------------------------------------------------------

In other words, in general, what is the advantage of having variables in
closures leak out?
-- shanko