From: Hugo de Paix de Coeur <kabhal@...>
Date: 2002-06-12T20:01:46+09:00
Subject: array reference ?

Hi,
consider this bunk of code:

	irb(main):001:0> def modify(a)
	irb(main):002:1>   a += [ 2 ]
	irb(main):003:1> end
	nil
	irb(main):004:0> a = [ 1 ]
	[1]
	irb(main):005:0> modify(a)
	[1, 2]
	irb(main):006:0> a
	[1]                                  <<<< a hasn't been modified
	irb(main):007:0>

Why "a" isn't modified by "modify" function?, because this work with a
Hash class:

	irb(main):013:0> def modify(h)
	irb(main):014:1>   h[2] = 2
	irb(main):015:1> end
	nil
	irb(main):016:0> h = { 1 => 1 }
	{1=>1}
	irb(main):017:0> modify(h)
	2
	irb(main):018:0> h
	{1=>1, 2=>2}                          <<<< h has been modified

How can i make it working with an array?
thanks ..