From: rickyr <rickyrm978@...>
Date: 2009-10-07T00:45:05+09:00
Subject: How to do explicit copy

Hi,

I notice Ruby uses reference copy by default. The problem is I need to
keep two variables keep separate copies of the same data.

If I do this:

x = Hash.new
# fill a with data

y = x
# delete some keys from x

I got those same keys deleted from y ('cos x & y reference the same
data, I believe). How to tell ruby that I want y keep a separate copy
of x's data, so that if I do anything to x, y is not effected.

TIA