From: SpringFlowers AutumnMoon <summercoolness@...>
Date: 2007-10-14T23:42:37+09:00
Subject: Parameter in a block is not local?

I thought a iterator with a block is like an nameless function call...
so if it is a function call, the parameter is local.
but for the following, the output is surprising:

a = 1
p a

1.upto(10) {|a| p a}

p a

--------------

E:\>ruby test_iterator.rb
1
1
2
3
4
5
6
7
8
9
10
10

a is changed!

but is it true that the "a" is not global to begin with....
but then, isn't the "a" inside the block more local than the "a"
outside?

like in Pascal, i think there can be nested functions and therefore,
there will be local and then "local that is more local" than the outer
local.
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