From: Robert Klemme <shortcutter@...>
Date: 2012-01-20T19:55:19+09:00
Subject: Re: Beginner Questions

On Thu, Jan 19, 2012 at 11:32 PM, Ryan Davis <ryand-ruby@zenspider.com> wrote:
>
> On Jan 19, 2012, at 14:22 , Robert Klemme wrote:
>
>> Another remark: $dives.to_yaml(f) is potentially more efficient since
>> output is directly written to the stream whereas the form with #write
>> first creates the complete string in memory before writing it.
>
> Huh. I didn't know you could do that. Normally I use YAML.dump and pass the IO in.

Even better!  That way you can easily exchange persistence with Marshal.

irb(main):004:0> data = {:now => Time.now}
=> {:now=>2012-01-20 11:53:17 +0100}
irb(main):005:0> f="x"
=> "x"
irb(main):006:0> [Marshal, YAML].each do |perst|
irb(main):007:1* File.open(f,'wb'){|io| perst.dump(data, io)}
irb(main):008:1> p File.open(f,'rb'){|io| perst.load(io)}
irb(main):009:1> end
{:now=>2012-01-20 11:53:17 +0100}
{:now=>2012-01-20 11:53:17 +0100}
=> [Marshal, Psych]

:-)

Kind regards

robert

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