From: Robert Klemme <shortcutter@...>
Date: 2009-10-08T16:55:58+09:00
Subject: Re: How to do explicit copy

2009/10/8 rickyr <rickyrm978@gmail.com>:
> On Oct 6, 10:50 pm, Patrick Okui <po...@psg.com> wrote:
>> On Oct 6, 2009, at 6:45 PM, rickyr wrote:
>>
>> > y = x
>>
>> y = x.dup may be sufficient for you (it does a shallowcopy).
>
> Thanks, it worked. Now, what are the differences between object#dup
> and object#clone. Both doing shallow copy.

It's in the docs:

ri Object#clone Object#dup

irb(main):001:0> s = "foo".freeze
=> "foo"
irb(main):002:0> t = s.clone
=> "foo"
irb(main):003:0> t << "ha!"
RuntimeError: can't modify frozen string
        from (irb):3
        from /opt/bin/irb19:12:in `<main>'
irb(main):004:0> t = s.dup
=> "foo"
irb(main):005:0> t << "ho!"
=> "fooho!"
irb(main):006:0> t
=> "fooho!"

Cheers

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/